1) Write expressions of relational algebra for the following queries draw the query trees for each and write the SQL statement: a. What PC models have a speed of at least 3.00 b. What the model numbers of all color printers c. Which manufacturer make laptops with at least 100 GB d. Find the model and price of all products (of any type) made by manufacturer "B" e. Find the manufacturers that sell laptops but not PC.
Answers
Answer:
Explanation:
Find attach the solution
The expressions of relational algebra for the given queries and the query trees for each with the SQL statement are explained.
Given are expressions for the given queries in relational algebra, draw the query trees, and provide the corresponding SQL statements:
Let's assume we have the following tables:
PC (model, speed, ram, hd, price)
Printer (model, color, type, price)
Laptop (model, speed, ram, hd, screen, price)
Product (model, type, price)
Manufacturer (name, country)
a. Relational algebra expression: π model (σ speed ≥ 3.00 (PC))
Query tree:
π model
|
σ speed >= 3.00
|
PC
SQL statement:
SELECT model
FROM PC
WHERE speed >= 3.00;
b. Relational algebra expression: π model (σ color = 'color' (Printer))
Query tree:
π model
|
σ color = 'color'
|
Printer
SQL statement:
SELECT model
FROM Printer
WHERE color = 'color';
(Note: Replace 'color' with the actual value representing color printers.)
c. Relational algebra expression: π name (σ hd ≥ 100 (Laptop ⋈ Manufacturer))
Query tree:
π name
|
σ hd >= 100
|
Laptop ⋈ Manufacturer
SQL statement:
SELECT DISTINCT m.name
FROM Laptop l
INNER JOIN Manufacturer m ON l.model = m.model
WHERE l.hd >= 100;
d. Relational algebra expression: π model, price (σ name = 'B' (Product ⋈ Manufacturer))
Query tree:
π model, price
|
σ name = 'B'
|
Product ⋈ Manufacturer
SQL statement:
SELECT p.model, p.price
FROM Product p
INNER JOIN Manufacturer m ON p.model = m.model
WHERE m.name = 'B';
e. Relational algebra expression: π name (Manufacturer) - π name (σ type = 'PC' (Product ⋈ Manufacturer)) ⋈ π name (σ type = 'Laptop' (Product ⋈ Manufacturer))
Query tree:
π name (Manufacturer)
|
-
/ \
/ \
π name π name (σ type = 'Laptop' (Product ⋈ Manufacturer))
|
σ type = 'PC'
|
Product ⋈ Manufacturer
SQL statement:
SELECT DISTINCT m.name
FROM Manufacturer m
WHERE m.name NOT IN (
SELECT DISTINCT m2.name
FROM Product p
INNER JOIN Manufacturer m2 ON p.model = m2.model
WHERE p.type = 'PC'
)
AND m.name IN (
SELECT DISTINCT m3.name
FROM Product p
INNER JOIN Manufacturer m3 ON p.model = m3.model
WHERE p.type = 'Laptop'
);
Please note that the SQL statements assume the actual column names in the tables may vary, and you need to adjust them accordingly.
Learn more about SQL statements click;
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Related Questions
Write a method called swapPairs that switches the order of values in an ArrayList of strings in a pairwise fashion. Your method should switch the order of the first two values, then switch the order of the next two, then the next two, and so on. If the number of values in the list is odd, the method should not move the final element. For example, if the list initially stores ["to", "be", "or", "not", "to", "be", "hamlet"], your method should change the list's contents to ["be", "to", "not", "or", "be", "to", "hamlet"].
Answers
Answer:
import java.util.ArrayList; public class Main { public static void main(String[] args) { ArrayList<String> strList =new ArrayList<String>(); strList.add("to"); strList.add("be"); strList.add("or"); strList.add("not"); strList.add("to"); strList.add("be"); strList.add("hamlet"); swapPairs(strList); System.out.println(strList); } public static void swapPairs(ArrayList<String> list){ for(int i=0; i < list.size()-1; i+=2){ String temp = list.get(i); list.set(i, list.get(i+1)); list.set(i+1, temp); } } }Explanation:
Firstly, let's create a method swapPairs that take one ArrayList (Line 18). In the method, use a for-loop to traverse through each item in the ArrayList and swap the items between the current items at index-i and at index-i+1 (Line 19-22). The index-i is incremented by two in next loop and therefore the next swapping will proceed with third and fourth items and so forth.
In the main program, create a sample ArrayList (Line 5-12) and then test the method (Line 14) and print the output (Line 15). We shall get [be, to, not, or, be, to, hamlet].
I have been trying to work on this for a while now, and this is on excel
In cell H10, enter an INDEX function that will use a nested INDIRECT reference to the Dept named range listed in column C (C10), and use the Reason field in column B (B10) as the row number to return for the department name in the referenced named range.
Nest the function inside an IF function so that issues currently displaying as a 0 will display as a blank cell. Resize the column width as needed.
** I got this much of the formula
=INDEX(INDIRECT("Dept"),Reason)
but it only recalls and displays the Dept column contents. I need it to recall the Dept and display the Reason, I think? Then at that point, how would I get this into an IF statement?
I feel like I dont understand the instructions, and I know I am not that great on excel.
Answers
Answer:
=IF(INDEX(INDIRECT(C10), B10)=0,"",INDEX(INDIRECT(C10), B10))
Or
=IF((INDEX((INDIRECT(Dept,TRUE)),Reason))="","",(INDEX((INDIRECT(Dept,TRUE)),Reason)))
Explanation:
Given
Your formula:.
=INDEX(INDIRECT("Dept"),Reason)
Dept column = C (C10)
Reason field = B (B10)
The issue with your formula is that you failed to include a statement to test the falsity of the first condition; in other words, if your if statement is not true, what else should the formula do.
The question says that
"Nest the function inside an IF function so that issues currently displaying as a 0 will display as a blank cell" this means that
if the INDEX() function returns 0, a blank should be displayed in H10 blank, instead.
So, the right formula both of these two. You can use any of them
1. =IF(INDEX(INDIRECT(C10), B10)=0,"",INDEX(INDIRECT(C10), B10))
2. =IF((INDEX((INDIRECT(Dept,TRUE)),Reason))="","",(INDEX((INDIRECT(Dept,TRUE)),Reason)))
The two does the same function; the only difference is that
(1) considers the cell itself while (2) considers the contents of the cell.
The analysis of both is that
They both use a nested indirect reference to check for the content of cells displaying 0.
The first if checks for the above mentioned; if yes, cell H10 is made to display a blank else it's original content is displayed.
16. Budget Analysis Write a program that asks the user to enter the amount that he or she has budgeted for a month. A loop should then prompt the user to enter each of his or her expenses for the month, and keep a running total. When the loop finishes, the program should display the amount that the user is over or under budget.
Answers
Answer:
import java.util.Scanner;
public class num8 {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.println("Enter month's budget");
double monthBudget = in.nextDouble();
double totalExpenses = 0.0;
double n;
do{
System.out.println("Enter expenses Enter zero to stop");
n = in.nextDouble();
totalExpenses += n;
}while(n>0);
System.out.println("Total expenses is "+totalExpenses);
System.out.println("The amount over your budget is "+ Math.abs(monthBudget-totalExpenses));
}
}
Explanation:
Using Java programming languagePrompt user for month's budgetUse Scanner class to receive and store the amount entered in a variableUse a do while loop to continuously request user to enter amount of expensesUse a variable totalExpenses to add up all the expenses inside the do while loopTerminate the loop when user enters 0 as amount.Subtract totalExpenses from monthBudget and display the difference as the amount over the budgetYou’ve done merge (on Lists), so now it’s time to do merge sort (on arrays). Create a public non-final class named MergeSort that extends Merge. Implement a public static method int[] mergesort(int[] values) that returns the input array of ints sorted in ascending order. You will want this method to be recursive, with the base case being an array with zero or one value. If the passed array is null you should return null. If the passed array is empty you should return an empty array. You do not have to sort the array in place, but the returned array does not have to be a copy. To help you your parent class Merge provides two useful class methods: int[] merge(int[] first, int[] second): this merges two sorted arrays into a second sorted array. If either array is null it returns null, so you should not call it on a null array. int[] copyOfRange(int[] original, int from, int to): this acts as a wrapper on Arrays.copyOfRange, accepting the same arguments and using them in the same way. (You can’t use java.util.Arrays in this problem for reasons that will become obvious if you inspect the rest of the documentation…) Note that the test code will test that you call merge an appropriate number of times, so you should call it to join single-element arrays together.
Answers
Answer:
Kindly check explaination for code
Explanation:
/* Java program for Merge Sort */
class MergeSort
{
// Merges two subarrays of arr[].
// First subarray is arr[l..m]
// Second subarray is arr[m+1..r]
void merge(int arr[], int l, int m, int r)
{
// Find sizes of two subarrays to be merged
int n1 = m - l + 1;
int n2 = r - m;
/* Create temp arrays */
int L[] = new int [n1];
int R[] = new int [n2];
/*Copy data to temp arrays*/
for (int i=0; i<n1; ++i)
L[i] = arr[l + i];
for (int j=0; j<n2; ++j)
R[j] = arr[m + 1+ j];
/* Merge the temp arrays */
// Initial indexes of first and second subarrays
int i = 0, j = 0;
// Initial index of merged subarry array
int k = l;
while (i < n1 && j < n2)
{
if (L[i] <= R[j])
{
arr[k] = L[i];
i++;
}
else
{
arr[k] = R[j];
j++;
}
k++;
}
/* Copy remaining elements of L[] if any */
while (i < n1)
{
arr[k] = L[i];
i++;
k++;
}
/* Copy remaining elements of R[] if any */
while (j < n2)
{
arr[k] = R[j];
j++;
k++;
}
}
// Main function that sorts arr[l..r] using
// merge()
void sort(int arr[], int l, int r)
{
if (l < r)
{
// Find the middle point
int m = (l+r)/2;
// Sort first and second halves
sort(arr, l, m);
sort(arr , m+1, r);
// Merge the sorted halves
merge(arr, l, m, r);
}
}
/* A utility function to print array of size n */
static void printArray(int arr[])
{
int n = arr.length;
for (int i=0; i<n; ++i)
System.out.print(arr[i] + " ");
System.out.println();
}
// Driver method
public static void main(String args[])
{
int arr[] = {12, 11, 13, 5, 6, 7};
System.out.println("Given Array");
printArray(arr);
MergeSort ob = new MergeSort();
ob.sort(arr, 0, arr.length-1);
System.out.println("\nSorted array");
printArray(arr);
}
}
Answer:
Check the explanation
Explanation:
/* Java program for Merge Sort */
class MergeSort
{
// Merges two subarrays of arr[].
// First subarray is arr[l..m]
// Second subarray is arr[m+1..r]
void merge(int arr[], int l, int m, int r)
{
// Find sizes of two subarrays to be merged
int n1 = m - l + 1;
int n2 = r - m;
/* Create temp arrays */
int L[] = new int [n1];
int R[] = new int [n2];
/*Copy data to temp arrays*/
for (int i=0; i<n1; ++i)
L[i] = arr[l + i];
for (int j=0; j<n2; ++j)
R[j] = arr[m + 1+ j];
/* Merge the temp arrays */
// Initial indexes of first and second subarrays
int i = 0, j = 0;
// Initial index of merged subarry array
int k = l;
while (i < n1 && j < n2)
{
if (L[i] <= R[j])
{
arr[k] = L[i];
i++;
}
else
{
arr[k] = R[j];
j++;
}
k++;
}
/* Copy remaining elements of L[] if any */
while (i < n1)
{
arr[k] = L[i];
i++;
k++;
}
/* Copy remaining elements of R[] if any */
while (j < n2)
{
arr[k] = R[j];
j++;
k++;
}
}
// Main function that sorts arr[l..r] using
// merge()
void sort(int arr[], int l, int r)
{
if (l < r)
{
// Find the middle point
int m = (l+r)/2;
// Sort first and second halves
sort(arr, l, m);
sort(arr , m+1, r);
// Merge the sorted halves
merge(arr, l, m, r);
}
}
/* A utility function to print array of size n */
static void printArray(int arr[])
{
int n = arr.length;
for (int i=0; i<n; ++i)
System.out.print(arr[i] + " ");
System.out.println();
}
// Driver method
public static void main(String args[])
{
int arr[] = {12, 11, 13, 5, 6, 7};
System.out.println("Given Array");
printArray(arr);
MergeSort ob = new MergeSort();
ob.sort(arr, 0, arr.length-1);
System.out.println("\nSorted array");
printArray(arr);
}
}
/* This code is contributed by Rajat Maurya */
Write, run, and test a MARIE assembly language program.The program should allow the user to input 8 numbers and find the smallest and the largest. The program should then print the smallest number and the largest number. Numbers are limited to integers, and can be positive, negative, or zero. You do NOT have to prompt input or label output.
Answers
The language program is as follows:
Explanation:
ORG 100 / Calculation of the maximum
Load First /loading 1st array member
Store Next /address of next pointer,stores
Load Array /Loading 1st element
Store Max /maximum value with 1st element
Loop, Clear
AddI Next /Load next element!
Subt Max /Comparing with the maximum once
Skipcond 000 /If negative ->skip
Jump NewMax /If not negative ->max value
NextIdx, Load Next
Add One /pointer++
Store Next
Load Count /counter--
Subt One
Skipcond 800 /counter is positive ->same proceeding
Jump Print /else - printing the result
Store Count /counter decresed and stored
Jump Loop
NewMax, Clear / new maximum value
AddI Next
Store Max
Jump NextIdx
Print, Load Max
Output
Halt /Terminate program
First, Hex 11E /starting is location 11E(change as per...,as code changes don't forget to change it too)
Next, Hex 0 /next element index (memory location)
Max, Dec 0 /maximum value
Count, Hex 8 / loop counter decreases
One, Dec 1 /Loop stops
say array:
[Dec -5, Dec 15, Dec -17, Dec 20, Dec -23, Dec 12, Dec 130, Dec -12]
Moving Images are called________.
Group of answer choices
pictures
comic strips
films
animations
Answers
Answer:
films
Explanation:
- Pictures, comic strips, and animations is wrong because they are static images.
- Films are known as "moving pictures" and therefore are moving images. That makes film your correct answer.
- Hope this helps! If you would like a further explanation please let me know.
Consider the following requests to read data from sectors of a hard drives, where the current position of the head is at sector 103 and the head is moving towards sector 0. What is the order in which the sectors in the queue would be services using the SCAN disk scheduling algorithm? 19, 5, 109, 23, 10, 87, 32, 120, 74, 14, 151, 81, 1, 123, 198
Answers
Answer:
168
Explanation:
=(109-103)+(120-109)+(123-120)+(151-123)+(198-151)+(87-74)+(74-32)+(32-23)+(23-19)+(19-14)+(14-10)+(10-5)+(1-0)
=6+11+3+28+47+3+42+9+4+5+4+5+1
=168
2. Write the binary representation of number 1037.379 in IEEE 754 standard in single precision. Express the result in binary, oct, and hex formats. 3. Write the binary representation of number 64.48 in IEEE 754 standard in double precision. Express the result in binary, oct, and hex formats. 4. Register f3 contains the 32-bit number 10101010 11100000 00000000 00000000. What is the corresponding signed decimal number
Answers
Answer:
-1.75
Explanation:
kindly refer to attachment for a detailed step by step solution to the problem.
In this chapter, you subnetted a Class C private network into six subnets. In this project, you work with a Class B private network. Complete the steps as follows: 1. Your employer is opening a new location, and the IT director has assigned you the task of calculating the subnet numbers for the new LAN. You’ve determined that you need 50 subnets for the Class B network beginning with the network ID 172.20.0.0. How many host bits will you need to use for network information in the new subnets? 2. After the subnetting is complete, how many unused subnets will be waiting on hold for future expansion, and how many possible hosts can each subnet contain?
Answers
Answer:
1. 10 bits
2. 1022 Hosts / Subnet
Explanation:
Given Network ID is 172.20.0.0
Class B network contains :
Network ID = 16 bits
Host ID = 16 bits
For subnetting always host id bits are used.
Number of subnets required = 50. Subnets are always in power of two. Nearest power of two to 50 is 26 = 64.
So, to create subnet we require 6 bits from host id and 64 subnets can be created with those 6 bits.
1)
Number of host bits needed for new subnets for network information = 6 bits.
Therefore, New network information contains :
Network ID of subnet = 16 + 6 = 22 bits
Host ID = 16- 6 = 10 bits.
2)
Subnets required = 50
Subnets created with 6 bits = 64.
Number of subnets unused for future expansion = 64 - 50 = 14 subnets.
Host ID part contains 10 bits. Therefore, Total number of Hosts /Subnet = 210 = 1024 Hosts.
Number of usable hosts per subnet = 1024 -2 = 1022 Hosts / Subnet.
Subnetting the Class B private network 172.20.0.0 into 50 subnets requires using 6 bits for subnetting, leaving 10 bits for the hosts. This results in 14 unused subnets and 1022 possible hosts per subnet.
Subnetting a Class B private network to create 50 subnets involves several steps. Let's start by understanding the requirements:
1. Determine the number of host bits to borrow: The Class B network starting address is 172.20.0.0. Class B networks have a default subnet mask of 255.255.0.0, meaning the first 16 bits are for the network, and the remaining 16 bits are for the host.
We need to create 50 subnets. The number of bits needed to create 'n' subnets is calculated by the formula 2^n ≥ required subnets. Here, we need at least 50 subnets.
So, we need to solve 2^n ≥ 50, which results in n = 6 bits (since 2^6 = 64). The subnet mask will now be 255.255.252.0 (i.e., borrowing 6 bits from the host part).
2. Calculate the number of host bits left: Originally, there are 16 host bits. Borrowing 6 bits leaves us with 10 bits for hosts.
3. Determine unused subnets and possible hosts per subnet: We have created 64 subnets (2^6). We needed only 50, so there will be 14 unused subnets (64 - 50).
The number of hosts per subnet is calculated as 2^(number of host bits) - 2 (to account for network and broadcast addresses). So, 2^10 - 2 = 1022 hosts per subnet.
In summary:
6 bits are used for subnetting.There will be 14 unused subnets.Each subnet can contain up to 1022 hosts.please help guys I'm so lost
Answers
Answer:
The correct answer is C ( W * 5 )
1. Write an application that inputs five numbers, each between 10 and 100, inclusive. As each number is read, display it only if it’s not a duplicate of a number already read. Provide for the "worst case," in which all five numbers are different. Use the smallest possible array to solve this problem. Display the complete set of unique values input after the user enters each new value. This is a sample run of your program: Enter·an·integer·between·10·and·100:100↵ This·is·the·first·time·100·has·been·entered↵ Enter·an·integer·between·10·and·100:100↵ Enter·an·integer·between·10·and·100:10↵ This·is·the·first·time·10·has·been·entered↵ Enter·an·integer·between·10·and·100:20↵ This·is·the·first·time·20·has·been·entered↵ Enter·an·integer·between·10·and·100:20↵ The·complete·set·of·unique·values·entered·is:↵ Unique·Value·1:·is·100↵ Unique·Value·2:·is·10↵ Unique·Value·3:·is·20
Answers
Answer:
Check the explanation
Explanation:
import java.util.Scanner;
public class DuplicateElimination {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int arr[] = new int[5];
int size = 0, n;
for(int i = 0;i<5;i++){
System.out.print("Enter an integer between 10 and 100:");
n = scanner.nextInt();
if(size==0 || elemanVarmı(arr,size,n)){
System.out.println("This is the first time "+n+" has been entered");
arr[size] = n;
size++;
}
}
System.out.println("The complete set of unique values entered is");
for(int i = 0;i<size;i++){
System.out.println("Unique Value "+(i+1)+": is "+arr[i]);
}
}
private static boolean elemanVarmı(int dizi[], int size, int n)
{
for (int i = 0; i < size; i++)
{
if(dizi[i]==n)
{
return false;
}
}
return true;
}
}
Final answer:
The question is about designing a programming application that takes in up to five integers between 10 and 100 and displays each unique number entered by the user. The program maintains a small array to store the unique numbers and possibly includes functionality to determine the minimum and maximum values from the input, as well as error handling for invalid inputs.
Explanation:
Programming Unique Values Application
The application you're describing involves creating a program that accepts five integers between 10 and 100, inclusive. Each number entered by the user should be checked against the existing list of input numbers to determine if it is a duplicate. If it is not a duplicate, it should then be displayed and added to the list of unique values. To handle this scenario, the program could use an array with a length that corresponds to the maximum number of unique integers, which in the worst case would be five. As the user inputs each number, the program should check if the number is already present in the array. If it isn't, the number should be added to the array, and the current list of unique numbers should be displayed. This helps in avoiding the storage of duplicate numbers and efficiently manages the memory by using the smallest array necessary.
To extend the functionality, as indicated in Exercise 5.2, the same logical structure can be applied to also keep track and display the maximum and minimum value entered by the user at the end of the input sequence. We could also implement error handling to provide feedback if invalid input is given, similar to the approach outlined in Exercise 5.1 for detecting user input mistakes. This kind of functionality often involves iterative loops, array manipulation, and conditional statements to handle the logic.
gAssume that you are writing a program to merge two files named FallStudents and SpringStudents. Each file contains a list of students enrolled in a programming logic course during the semester indicated, and each file is sorted in student ID number order. After the program compares two records and subsequently writes a Fall student to output, the next step is to _________.
Answers
Answer:
read a FallStudents record
Explanation:
When data is input from a file, the data is processed and then placed in the output file. In order to verify the validity of this process, the output file is checked.
After comparing data in the FallStudents and SpringStudents files, and placing in sorted order by StudentID. The output data is placed in file FallStudents record. After the complete process is done, the output/file record which is the FallStudents record is read.
Compose a program to examine the string "Hello, world!\n", and calculate the total decimal numeric value of all the characters in the string (including punctuation marks), less the numeric value of the vowels.
The program should load each letter, add that numerie value to the running total to produce a total sum, and then add the value to a "vowels running total as well. The program will require a loop. You do not need a counter, since the phrase is null terminated. Remember, punctuation (even spaces!) have a numeric value as well.
Answers
Answer:
.data
str: .asciiz "Hello, world!\n"
output: .asciiz "\nTotal character numeric sum = "
.text
.globl main
main:
la $t0,str # Load the address of the string
li $t2,0 # Initialize the total value to zero
loop: lb $t1,($t0) # Load one byte at a time from the string
beqz $t1,end # If byte is a null character end the operation
add $t2,$t2,$t1 # Else add the numeric value of the byte to the running total
addi $t0,$t0,1 # Increment the string pointer by 1
b loop # Repeat the loop
end:
# Displaying the output
li $v0,4 # Code to print the string
la $a0,output # Load the address of the string
syscall # Call to print the output string
li $v0,1 # Code to print the integer
move $a0,$t2 # Put the value to be printed in $a0
syscall # Call to print the integer
# Exiting the program
li $v0,10 # Code to exit program
syscall # Call to exit the program
Explanation:
6. In cell K4, create a formula using the IF function to calculate the interest paid on the mortgage (or the difference between the total payments made each year and the total amount of mortgage principal paid each year). a. The formula should first check if the value in cell H4 (the balance remaining on the loan each year) is greater than 0. b. If the value in cell H4 is greater than 0, the formula should return the value in J4 subtracted from the value in cell D5 multiplied by 12. Use a relative cell reference to cell J4 and an absolute cell reference to cell D5. (Hint: Use 12*$D$5-J4 as the is_true argument value in the formula.) c. If the value in cell H4 is not greater than 0, the formula should return a value of 0. Copy the formula from cell K4 into the range K5:K18.
Answers
Answer:
a. =IF(H4>0,12*$D$5-J4,0)
Explanation:
a. =IF(H4>0,12*$D$5-J4,0)
If( H4>0 is the logical test,
12*$D$5-J4 is [value_if_true]
0 is [value_if_false]
b. Referencing to the above formula in (a), which is the required formula which should be typed in cell K4.
Absolute referencing of cell D5 means that this will not change while extending this formula to the entire column. Whereas, since cell H4 and J4 have relative cell referencing, these will change relatively as we extend the formula to the entire column.
Five batch jobs. A through E, arrive at a computer center at almost the same time. They have estimated running times of 10, 6, 2, 4, and 8 minutes. For each of the following scheduling algorithms, determine the average process turnaround time. Ignore process switching overhead. Note that all jobs are completely CPU bound. Assumption: The processes are added to the ready queue in this order: run in order A, B, C, D, E.
Answers
Answer:
a) Round Robin = 21.2 minutes
(b) First -come, First Serve = 19.2 minutes
(c) Shortest job first = 14 minutes
Explanation:
The five job have a time of 10, 6, 2, 4, and 8.
The question doesn't specify the scheduling algorithm, so we will solve for round Robin scheduling algorithm, First Come First Serve and shortest job first scheduling algorithm.
Shortest job first scheduling algorithm execute the job that has the shortest completion time first.
First Come First Serve scheduling algorithm execute the job based on order of arrival.
Round Robin scheduling algorithm execute job based on a given time slice. If the time given is finish and the job hasn't finished, the job is removed and put on the queue while another job enter for execution.
Turnaround time = Completion time - Arrival time
In this case; our arrival time is 0; so turnaround time = completion time.
(a) Round Robin: We were not given quantum time, so we assume quantum time of 1. The sequence of execution will be:
A B C D E | A B C D E | A B D E | A B D E | A B E | A B E | A E | A E | A | A
Average Turnaroud time =
((30-0) + (23-0) + (8-0) + (17-0) + (28-0))/5 = 106/5 = 21.2 minutes
(b) First -come, first served (run in order 10, 6, 2, 4, 8):
A B C D E = ((10-0) + (16-0) + (18-0) + (22-0) + (30-0))/5 = 96/5 = 19.2 minutes
(c) Shortest job first:
C D B E A = ((2-0) + (6-0) + (12-0) + (20-0) + (30-0))/5 = 70/5 = 14 minutes
A smart speaker has no screen or keypad for changing its settings. Order three steps to configure the speaker.
Connect the smartphone to the speaker’s Wi-Fi hotspot.
Download the speaker’s app to a smartphone.
Enter the password to the home Wi-Fi network.
Enter the password to the speaker’s Wi-Fi hotspot.
Answers
A smart speaker has no screen or keypad for changing its settings.
The steps we will follow to configure the speaker are
Firstly we need to enter the password to the speaker’s Wi-Fi hotspot .so that we can connect the speakers Wi-Fi.Secondly we should connect the smartphone to the speaker’s Wi-Fi hotspot.Thirdly we should download the speaker’s app to a smartphone.So that we can operate the speakerExplanation:
A smart speaker has no screen or keypad for changing its settings.The steps we will follow to configure the speaker are
Firstly we need to enter the password to the speaker’s Wi-Fi hotspot .so that we can connect the speakers Wi-Fi.Secondly we should connect the smartphone to the speaker’s Wi-Fi hotspot.Thirdly we should download the speaker’s app to a smartphone.So that we can operate the speakerThus above mentioned is the order of the three steps that we need to follow in order to configure the speaker.
To configure a smart speaker without a screen or keypad, you need to connect your smartphone to the speaker's Wi-Fi hotspot, download the speaker's app, and enter the password to your home Wi-Fi network.
Explanation:To configure a smart speaker without a screen or keypad, follow these three steps:
This programming project is to simulate a few CPU scheduling policies discussed in the class. You willwrite a C program to implement a simulator with different scheduling algorithms. The simulator selects atask to run from ready queue based on the scheduling algorithm. Since the project intends to simulate aCPU scheduler, so it does not require any actual process creation or execution. When a task is scheduled,the simulator will simply print out what task is selected to run at a time. It outputs the way similar to Ganttchart style.
Answers
Answer:
FCFS Scheduling Algorithm:-
// C++ program for implementation of FCFS
// scheduling
#include<iostream>
using namespace std;
// Function to find the waiting time for all
// processes
void findWaitingTime(int processes[], int n,
int bt[], int wt[])
{
// waiting time for first process is 0
wt[0] = 0;
// calculating waiting time
for (int i = 1; i < n ; i++ )
wt[i] = bt[i-1] + wt[i-1] ;
}
// Function to calculate turn around time
void findTurnAroundTime( int processes[], int n,
int bt[], int wt[], int tat[])
{
// calculating turnaround time by adding
// bt[i] + wt[i]
for (int i = 0; i < n ; i++)
tat[i] = bt[i] + wt[i];
}
//Function to calculate average time
void findavgTime( int processes[], int n, int bt[])
{
int wt[n], tat[n], total_wt = 0, total_tat = 0;
//Function to find waiting time of all processes
findWaitingTime(processes, n, bt, wt);
//Function to find turn around time for all processes
findTurnAroundTime(processes, n, bt, wt, tat);
//Display processes along with all details
cout << "Processes "<< " Burst time "
<< " Waiting time " << " Turn around time\n";
// Calculate total waiting time and total turn
// around time
for (int i=0; i<n; i++)
{
total_wt = total_wt + wt[i];
total_tat = total_tat + tat[i];
cout << " " << i+1 << "\t\t" << bt[i] <<"\t "
<< wt[i] <<"\t\t " << tat[i] <<endl;
}
cout << "Average waiting time = "
<< (float)total_wt / (float)n;
cout << "\nAverage turn around time = "
<< (float)total_tat / (float)n;
}
// Driver code
int main()
{
//process id's
int processes[] = { 1, 2, 3};
int n = sizeof processes / sizeof processes[0];
//Burst time of all processes
int burst_time[] = {10, 5, 8};
findavgTime(processes, n, burst_time);
return 0;
}
Explanation:
See output
A terrible new disease, HORSEVID, has begun to spread among horses worldwide. Stable manager Jimmy is trying to take as many precautions as possible to protect his herd from infection.
Stable manager Jimmy's barn is a long narrow building containing N stalls in a row (2≤N≤105). Some of these stalls are currently occupied by horses, and some are vacant. Having read about the importance of "social distancing", Stable manager Jimmy wants to maximize D, where D is the distance between the closest two occupied stalls. For example, if stalls 3 and 8 are the closest that are occupied, then D=5.
Two new horses recently joined Jimmy's herd and he needs to decide to which formerly-unoccupied stalls they should be assigned. Please determine how he can place his two new horses so that the resulting value of D is still as large as possible. Stable manager Jimmy cannot move any of his existing horses; he only wants to assign stalls to the new horses.
INPUT:
The first line of input contains N.
The next line contains a string of length N of 0s and 1s describing the sequence of stalls in the barn. 0s indicate empty stalls and 1s indicate occupied stalls. The string has at least two 0s, so there is at least enough room for two new horses.
OUTPUT:
Please print the largest value of D
(the closest distance between two occupied stalls) that Stable manager Jimmy can achieve after adding his two new horses in an optimal fashion.
SAMPLE INPUT:
14
10001001000010
SAMPLE OUTPUT:
2
In this example, Stable manager Jimmy could add horses to make the occupancy string look like 10x010010x0010, where x's indicate the new horses. In this case D=2. It is impossible to add the new horses to achieve any higher value of D.
Answers
Answer:
Explanation:
Well here you only have to add 2 new horses .... so simply what you can do is find 2 slots where the gap is maximum ... lets take the given example in detail to understand the same.... here 10001001000010 here you can observe that the difference between the first two filled slots is 3 then 2 then 4 then 1....... make it a separate array ...... now as i said that we just need to place two new horses so we just need two of the biggest numbers from this array and place the new horses at the center of the corresponding slots ... like here 3 and 4 are greatest ... so one horse is placed in between the gap corresponding to 3 while other at 4 ..... after making the new array answer can be find in linear time itself... I hope this makes sense ....
Now lets understand how to program it easily so firstly after scanning all stuff ..... we will make a gap array .... then just think now what we will do is find the greatest two numbers then again putting the horses and then find our answers .... so now an easy approach is that instead of making the string again and again searching for answer .... what we do is just do half of the two greatest ones and again find the greatest one in array....
at what x position are the ellipses drawn??? thanks ♡
Answers
Answer:
55
Explanation:
The xPos variable is set to 55 and they have set the variable in the code for the ellipses in the x position
Hope this helps
Sites like Zillow get input about house prices from a database and provide nice summaries for readers. Write a program with two inputs, current price and last month's price (both integers). Then, output a summary listing the price, the change since last month, and the estimated monthly mortgage computed as (current_price * 0.051) / 12. Output each floating-point value with two digits after the decimal point, which can be achieved as follows:
Answers
Final answer:
The student's question involves writing programs in C++ and Python to summarize current house price, change since last month, and estimate the monthly mortgage. Example codes in both languages are provided, offering a clear and concise way to calculate and present the required financial information.
Explanation:
As a solution to the student's request, we can provide a simple program in both C++ and Python to calculate the summary of a house pricing including the current price, the change since last month, and the estimated monthly mortgage. Below are example codes for both languages:
C++ Program:
#include
#include
int main() {
int currentPrice, lastMonthsPrice;
std::cin >> currentPrice >> lastMonthsPrice;
double change = currentPrice - lastMonthsPrice;
double monthlyMortgage = (currentPrice * 0.051) / 12;
std::cout << std::fixed << std::setprecision(2);
std::cout << "Current Price: $" << currentPrice << "\n";
std::cout << "Change Since Last Month: $" << change << "\n";
std::cout << "Estimated Monthly Mortgage: $" << monthlyMortgage << std::endl;
return 0;
}
Python Program:
current_price = int(input())
last_months_price = int(input())
change = current_price - last_months_price
monthly_mortgage = (current_price * 0.051) / 12
print(f'Current Price: ${current_price:.2f}')
print(f'Change Since Last Month: ${change:.2f}')
print(f'Estimated Monthly Mortgage: ${monthly_mortgage:.2f}')
By inputting the current and last month's house prices, these programs will output a formatted summary that includes change in price and monthly mortgage estimate.
The ticketing system at the airport is broken, and passengers have lined up to board the plane in the incorrect order. This line is represented in an ArrayList tickets in the AirLineTester class. Devise a way to separate passengers into the correct boarding groups. Currently, there is an AirlineTicket class that holds the information for each passengers ticket. They have a name, seat, row, and boarding group. Use the TicketOrganizer class to help fix the order of passengers boarding. First, create a constructor that takes an ArrayList of AirLineTickets and copies it to a class variable ArrayList. Then, create a getTickets method to get the ArrayList of AirLineTickets. In the TicketOrganizer class, create a method called printPassengersByBoardingGroup that prints out the name of the passengers organized by boarding group. The boarding groups go from 1-5, and have been predetermined for you. This should print the boarding group followed by all passengers in the group:
Answers
Final answer:
The TicketOrganizer class can be used to separate passengers into the correct boarding groups. It provides a constructor to store the ArrayList of AirLineTickets and a method to print passengers by boarding group.
Explanation:
The TicketOrganizer class can be used to separate passengers into the correct boarding groups. To do this, you can create a constructor in the TicketOrganizer class that takes an ArrayList of AirLineTickets as a parameter and stores it in a class variable ArrayList. This can be done using the following code:
public class TicketOrganizer {private ArrayList<AirLineTicket> tickets;
public TicketOrganizer(ArrayList<AirLineTicket> tickets) {
this.tickets = new ArrayList<>(tickets);
}
public ArrayList<AirLineTicket> getTickets() {
return tickets;
}
public void printPassengersByBoardingGroup() {
for (int i = 1; i <= 5; i++) {
System.out.println("Boarding Group " + i + ":");
for (AirLineTicket ticket : tickets) {
if (ticket.getBoardingGroup() == i) {
System.out.println(ticket.getName());
}
}
}
}
}
This code creates a TicketOrganizer class with a constructor that takes an ArrayList of AirLineTickets and creates a copy of it in a class variable. It also provides a getTickets method to retrieve the ArrayList of AirLineTickets. The printPassengersByBoardingGroup method loops through the boarding groups (1-5) and prints the name of each passenger in that group.
Below is the Python code:
class AirlineTicket:
def __init__(self, name, seat, row, boarding_group):
self.name = name
self.seat = seat
self.row = row
self.boarding_group = boarding_group
class TicketOrganizer:
def __init__(self, tickets):
self.tickets = tickets
def getTickets(self):
return self.tickets
def printPassengersByBoardingGroup(self):
for boarding_group in range(1, 6):
group_passengers = [passenger for passenger in self.tickets if passenger.boarding_group == boarding_group]
print(f"Boarding Group {boarding_group}:")
for passenger in group_passengers:
print(passenger.name)
# Create an ArrayList of AirlineTickets
tickets = [
AirlineTicket("Alice", "A1", "10", 1),
AirlineTicket("Bob", "B2", "20", 2),
AirlineTicket("Charlie", "C3", "30", 3),
AirlineTicket("David", "D4", "40", 4),
AirlineTicket("Eve", "E5", "50", 5),
]
# Create a TicketOrganizer object
organizer = TicketOrganizer(tickets)
# Print the passengers by boarding group
Based on the above, the code successfully separates the passengers into the correct boarding groups. The output shows the boarding group followed by all passengers in the group.
Create a Sub called "daisyDecisions" that runs when you click a button. In this sub, you will create a program that determines whether he/she loves you, or loves you not. The program should receive, as an input, the number of petals on the flower (i.e., have a variable for petals) and then use that number to determine the output of the program: if the number of petals is even, then the program should output that he/she loves you not, if odd, then he/she loves you.
Answers
Answer:
see explaination
Explanation:
Please find the screenprint and the VBA code. As shown in the screenprint, range B1 is used to enter the number of petals. If you want to use a different cell for petals input, then change the code accordingly.
Also, the VBA code is placed in the Sheet1 module. No new modules are inserted.
Screenprint: see attachment for screenshot
VBA Code:
Private Sub CommandButton1_Click()
Call daisyDecisions
End Sub
Private Sub daisyDecisions()
Dim remainder As Integer
Dim noOfPetals As Integer
noOfPetals = Sheet1.Range("B1").Value
remainder = noOfPetals Mod 2
If remainder <> 0 Then
MsgBox "He/She loves you!!!"
Else
MsgBox "He/She loves you not!!!"
End If
End Sub
int iterFib(int n) {int a = 0, b = 1, c, i;for(i=2; i<=n; i++) {c = a + b;a = b;b = c;}return b;}What are the missing MIPS instructions? Please record only the letter in lower case.iterFib: addi $sp, $sp, -12
Answers
Answer:
Instruction 1 , It should store the content of s2 intot the stack.
Hence instruction will be sw $s2,0($sp)
Instruction 2 , It will check if the value of t2 is one or not. If it is zero it should exit.
Hence instruction will be beq $t2,$zero,exitFib
Explanation:
Suppose we are sorting an array of eight integers using quicksort, and we have just finished the first partitioning with the array looking like this: 2 5 1 7 9 12 11 10, which statement is correct?
a. The pivot could be 7, but it is not 9.
b. The pivot could be 9 but not 7.
c. The pivot could be either 7 or 9.
d. Neither 7 nor 9 is the pivot.
Answers
Answer:
c. The pivot could be either 7 or 9.
Explanation:
Since we are trying to sort an array of eight integers using quick sort, from the first partitioning it shows that the pivot or the central point can either be 7 or 9. When you look at the array, it is only 7 and 9 that are placed correctly in the sorted array. Every element to the left of 7 and 9 are smaller and every element on the right of 7 and 9 are integers higher than them. Hence this shows that the pivot lies between 7 or 9.
The pivot element of an array is the middle element of the array.
The pivot element could be either 7 or 9
From the question, we have:
[tex]\mathbf{n = 8}[/tex]
So, the pivot element is:
[tex]\mathbf{Pivot = \frac{n +1}{2}}[/tex]
So, we have:
[tex]\mathbf{Pivot = \frac{8 +1}{2}}[/tex]
[tex]\mathbf{Pivot = \frac{9}{2}}[/tex]
Divide 9 by 2
[tex]\mathbf{Pivot = 4.5}[/tex]
So, the pivot element is the 4.5th element.
The 4.5th element is between the 4th and 5th element (i.e. 7 or 9)
This means that, the pivot element could be either 7 or 9
Hence, the correct option is (c).
Read more about pivot elements at:
https://brainly.com/question/16260051
After reading the case presented in the module, write a short response to the following discussion questions and ethical decision making scenario. Discussion Questions
What questions should Iris ask Charlie about the new job, Kelvin’s team, and the future of the company?
What questions should Iris ask Kelvin about the new job?
Had you been in Kelvin’s place, what would you have done differently to prepare for this meeting?
Answers
Final answer:
Iris should ask Charlie and Kelvin thorough questions about the job's responsibilities, the team dynamics, and the company's future. Reflecting on past decisions with an understanding of cognitive bias leads to better outcomes. It's essential to commit to ongoing critical reflection to avoid future biases in decision-making.
Explanation:
Discussion Questions for Iris
When considering questions that Iris should ask Charlie, she should be inquisitive about the specifics of the new job, the dynamics within Kelvin's team, and the future of the company. This includes asking about the job responsibilities, the team's current projects and goals, the team's working style and culture, any potential for advancement, and the company's vision for the future and stability.
Questions for Kelvin
Regarding questions for Kelvin, Iris could probe deeper into how the role fits into the company's larger strategy, how success will be measured for the new position, what the expectations are during the first few months, and how Kelvin envisions the position evolving. These questions would provide Iris with a comprehensive understanding of how her potential role manifests within the company's framework.
Hypothetical Scenario as Kelvin
If placed in Kelvin's position, to prepare for the meeting, I would ensure that I clearly understood the objectives for the new role, prepared a structured plan outlining how I would integrate the new member into the team, and had a thorough understanding of the company's future plans to address any inquiries. Reflecting on past decisions through the lens of cognitive bias would help mitigate any irrational elements involved in decision-making.
Impact of Different Behaviors
Had a different approach been taken, such as being more critical or self-aware, the consequences may have included more informed decision-making and reduced chances of miscommunication. Understanding the cognitive bias and employing critical reflection and metacognition could have led to better outcomes and a healthier decision-making process.
Conclusion and Lessons Learned
In conclusion, reflecting on experiences and understanding cognitive biases can profoundly impact personal growth and decision-making. This level of self-awareness can lead to improved choices in the future and help avoid repeating the same mistakes. Committing to ongoing critical reflection and seeking diverse perspectives are steps one can take today to prevent cognitive bias from clouding judgment.
"In about 100 words, describe the idea behind software as a service (SaaS). In your answer, include at least three examples of electronic commerce software packages or components that are offered as an SaaS."
Answers
Answer:
Explanation:
Saas refers to software as a service and can also be called software on demand .
It Isa software that is deployed over the internet rather than requiring to install an application .It offers different devices such as pay as you go , subscription model and service on demand model .
Only a compatible browser is needed to access the software .
Electronic packages or components that aree offered as an Saas
1)Shopify
2)Big commerce
3)Slack
Question 4: Write the code for a for-loop that prints the following outputs. You should be able to do it with either a single for-loop or a nested for-loop. Output 1: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Output 2: 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0
Answers
Final answer:
The question can be solved using a for-loop in Python. For the first output, we iterate through numbers 0 to 24, and for the second output, we use the modulo operation to repeat the pattern 0, 1, 2 eight times.
Explanation:
To print the specified outputs, we can use a simple for-loop in Python. The first output is a sequence from 0 to 24, and the second output is a repeated pattern of 0 to 2, eight times (since we repeat the pattern 8 times to get the same length as the first sequence).
Code for Output 1:
for i in range(25):print(i, end=' ')
This loop will iterate over a range from 0 to 24 and print each number followed by a space, resulting in the first output.
Code for Output 2:
for i in range(25):print(i % 3, end=' ')
This loop will also iterate over a range from 0 to 24, but it will print the remainder when each number is divided by 3 (which is the modulo operation), resulting in the pattern 0, 1, 2 repeated, for the second output.
Assume: Memory: 5 bit addresses Cache: 8 blocks All memory locations contain valid data If the memory location is 9. What is the Binary Address and cache block # If the memory location is 12. What is the Binary Address and cache block # If the memory location is 15. What is the Binary Address and cache block #
Answers
Answer:
The answer to this question can be described as follows:
binary address: 01001, 01100, 01111.
Cache block: 1, 4, 7
Explanation:
Given values
Memory = 5 bit and cache = 8 blocks
Option 1)
memory location is =9
convert into binary number, so we get binary address = 01001
So, the cache block = 1
Option 2)
memory location is = 12
convert into binary number, so we get binary address = 01100
So, the cache block = 4
Option 3)
memory location is =15
convert into binary number, so we get binary address = 01111
So, the cache block = 7
Create a stored procedure sp_Q1 that takes two country names like 'Japan' or 'USA' as two inputs and returns two independent sets of rows: (1) all suppliers in the input countries (SUPPLIERS TABLE) , and (2) products supplied by these suppliers (PRODUCTS TABLE). The returned suppliers should contain SupplierID, CompanyName, Phone, and Country. The returned products require their ProductID, ProductName, UnitPrice, SupplierID, and must be sorted by SupplierID. You must include a simple testing script to call your sp_Q1 using 'UK' and 'Canada' as its two inputs.
Answers
Answer:
Kindly note that, you're to replace "at" with shift 2 as the brainly text editor can't take the symbol
If you are executing this script with any other script, Add "GO" to the line above "CREATE PROCEDURE", on a line all by itself, and it should fix that error of 'CREATE/ALTER PROCEDURE'
Explanation:
CREATE PROCEDURE sp_Q1
"at"country1 NVARCHAR(15),
"at"country2 NVARCHAR(15)
AS
BEGIN
BEGIN
SELECT SupplierID, CompanyName, Phone, Country FROM suppliers
where Country in ("at"country1,"at"country2)
SELECT ProductID, ProductName, UnitPrice, SupplierID FROM Products
where SupplierID in(
SELECT SupplierID FROM suppliers
where Country in ("at"country1,"at"country2)) ORDER BY SupplierID
END
END
GO
-- Testing script.
DECLARE "at"RC int
DECLARE "at"country1 nvarchar(15)
DECLARE "at"country2 nvarchar(15)
-- Set parameter values here.
set "at"country1='UK'
set "at"country2='Canada'
EXECUTE "at"RC = [dbo].[sp_Q1]
"at"country1
,"at"country2
GO
When a system is configured to allow booting to different operating systems at startup, what is this called?
Answers
Answer:
The term dual-boot has come to mean the ability to boot between two or more operating systems at startup.
Explanation:
A dual boot is when you run two operating systems on one computer at the same time. This can be any combination of operating systems, for example, Windows and Mac, Windows and Linux or Windows 7 and Windows 10.
‘Booting’ is normally used interchangeably with ‘starting’ or ‘powering on’ when referring to computers. But in regard to dual-booting, the term specifically refers to something called the ‘boot manager’, a tiny program managed by the motherboard.
When you turn on a PC, the power supply unit (PSU) initially powers up the motherboard, which manages and holds together all your other computer components. If you’ve ever seen a black screen with text and possibly logos on it after you’ve started your PC, but before it gets to the Windows login screen, this is the motherboard letting you know it is on.
The motherboard scans all the different components that are connected to it, such as graphics cards, optical drives (CD or DVD) and disk drives. Once the motherboard has established the state of your hardware, it knows that you will most likely want to boot into an operating system. To do this, the motherboard passes over the drive information to the boot manager.
Boot managers are software that can run on your computer before an operating system is loaded. Their task is to locate operating systems on your drives and start-up whichever you would like to use. Most people with a Windows PC or Mac may never have seen the boot manager on their computer - it simply assumes that since it can only find one operating system, this is the one you want to use.