Answer: Interface methods, interface variables and interface markers.
Explanation:
Interface methods are public and abstract by default.
Interface variables can be declared public, static and final
Marker interfaces are simply empty interfaces without any methods.
What field would you use to store a value from another table?
A. Lookup
B. Hyperlink
C. Memo
D. AutoNumber
Answer:
A. Lookup
Explanation:
You would use the Lookup field to store a value from another table.
____ refers to the order in which values are used with operators.
a.
Floating
b.
Associativity
c.
Declaration
d.
Initialization
Answer:
b. Associativity
Explanation:
Associativity specifies the order in which operators are processed vis a vis operands/values in an expression. For example: Consider the expression: a + b + c. Here a + b is evaluated first before adding the result with c as the '+' operator is left associative. The default associativity can also be overridden by the use of parentheses. For example a + (b + c) . In this case b+c will be evaluated first.
Assuming vecList is a vector container, the expression ____ deletes all elements from the container.
A.
vecList.erase(position)
B.
vecList.erase(beg, end)
C.
vecList.clear()
Answer:
A. vecList.erase(position)
Explanation:
Assuming vecList is a vector container, the expression vecList.erase(position) deletes all elements from the container.
Assuming vecList is a vector container, the expression vecList.erase(position) deletes all elements from the container. Thus, the correct option for this question is A.
What is a Vector container?A vector container may be defined as a type of sequence that significantly represents arrays that can change in size. They significantly utilize contiguous storage locations for their elements. This means that their elements can also be accessed using offsets on regular pointers to their elements, and just as efficiently as in arrays.
According to the context of this question, vecList.erase(position) is the tool of the vector container in order to delete all sorts of elements that have been expressed by the vector container.
Therefore, the expression vecList.erase(position) deletes all elements from the container. Thus, the correct option for this question is A.
To learn more about vector containers, refer to the link:
https://brainly.com/question/12949818
#SPJ5
h(n)=h(n)+h(n-2)
h(2)=h(1)=h(0)=1, n>=2
Write a C++ function int h(int n)
Answer:
#include<iostream>
using namespace std;
int h(int i)
{
if(i==0 ||i==1||i==2)
return 1;
else
return(h(i-1)+h(i-2));
}
int main()
{
int n, result;
cout<<"Enter value for n:";
cin>>n;
result = h(n);
cout<<result;
}
Explanation:
The recurrence relation will be h(n)= h(n-1)+h(n-2), unless the recursion will not finish.
What is the minimum valid subscript value for array a?
#define MAX 50
int a[MAX], i, j, temp;
A. 0
B. 1
C. Any negative number
D. There is no minimum
E. None of the above
Answer:
The answer to this question is A. 0.
Explanation:
In this segment of code #define MAX 50 is used.It is a pre-processor directive and in pre processor directive it is a MACRO means whenever the compiler encounters the word MAX in the execution it replaces MAX with 50.
So the size of the array becomes 50 and the indexing starts from 0 and upto 49.
using Matlab programming I need to rotate the line defined by x,y by 45 degrees around 2,2
x= 2,4,6,8,10
y= 2,4,6,8,10
Answer:
% here x and y is given which we can take as
x = 2:2:10;
y = 2:2:10;
% creating a matrix of the points
point_matrix = [x;y];
% center point of rotation which is 2,2 here
x_center_pt = x(2);
y_center_pt = y(2);
% creating a matrix of the center point
center_matrix = repmat([x_center_pt; y_center_pt], 1, length(x));
% rotation matrix with rotation degree which is 45 degree
rot_degree = pi/4;
Rotate_matrix = [cos(rot_degree) -sin(rot_degree); sin(rot_degree) cos(rot_degree)];
% shifting points for the center of rotation to be at the origin
new_matrix = point_matrix - center_matrix;
% appling rotation
new_matrix1 = Rotate_matrix*new_matrix;
Explanation:
We start the program by taking vector of the point given to us and create a matrix by adding a scaler to each units with repmat at te center point which is (2,2). Then we find the rotation matrix by taking the roatational degree which is 45 given to us. After that we shift the points to the origin and then apply rotation ans store it in a new matrix called new_matrix1.
Imagine you want to clean up your database and decide to delete all records from the Review table that have an Id of 100 or less. What does your SQL statement look like?
Answer: The query to delete rows for the given scenario is
DELETE
FROM Review
WHERE Id < 100 OR Id = 100;
Explanation:
In SQL, the table can be removed using either DROP, TRUNCATE or DELETE commands.
DROP command is used to delete the whole structure of the table. The general syntax is given below.
DROP TABLE table_name;
After this command, the whole structure of the specified table will be deleted. This table will have to be created again in order to use it and put data in this table.
SELECT *
FROM table_name;
This command when executed after the DROP command, will show an error.
This command can be used to drop database objects like constraints, index and the others.
The TRUNCATE command removes all the rows from a table. The structure of the table remains intact and data can be put again in this table.
This command only removes the data currently present in the table.
The general syntax is given below.
TRUNCATE TABLE table_name;
The command below will compile but it will not return any rows.
SELECT *
FROM table_name;
Alternatively, DELETE keyword is used to drop only the rows from a given table.
The general syntax for deleting rows from a table is given below.
DELETE
FROM table_name
WHERE [condition];
The WHERE clause is optional in a DELETE query.
SELECT *
FROM table_name;
The above command will compile and return rows if rows are present in the table other than the deleted rows.
The table used in the given query is Review table. We assume that Id is the primary key for the Review table. The query becomes
DELETE
FROM Review;
The condition for this deletion is that Id should be less than or equal to 100. The final query is written as
DELETE
FROM Review
WHERE Id < 100 OR Id = 100;
Write a C++ program that usesInsertion Sort to sort an unsorted list of numbers.
C++ program - Insertion sort
#include <bits/stdc++.h>
using namespace std;
/* Defining function for sorting numbers*/
void insertionSort(int array[], int n)
{
int i, k, a;
for(i=1;i<n;i++)
{
k=array[i];
a=i-1;
while(a>=0 && array[a] > k) // moving elements of array[0 to i-1] are greater than k, to one position //
{
array[a+1] = array[a];
a =a-1;
}
array[a+1] =k;
}
}
/* Driver function */
int main()
{
int array[] = { 12,56,76,43,21}; //input integers
int n = sizeof(array) / sizeof(array[0]); //finding size of array
insertionSort(array, n); //Calling function
for (int i = 0; i < n; i++) //printing sorted array
cout << array[i] << " ";
cout << endl;
return 0;
}
What is ment by WCF services in asp.net?How does it help in creating web pages?
Answer:
WCF - Windows Communication Foundation
Explanation:
WCF stands for Windows Communication Foundation.
The first version of WCF is released as a part of .NET 3.0.The later versions are 4.0 and 4.5.
WCF is used to build distributed applications. Distributed application is an application that where parts of it run on two or more systems.
For example,
We have a web application running on one server. If this web application is consuming a web server which is running on another server, then this
application is called distributed application.
The programmers can also build 3-tier web application. The 3-tiers are,
1. Presentation tier
2. Business tier
3. Data Access tier
If all 3 tiers are deployed on same machine, scalability can be an issue, if more number of users try to access the application.
If we deploy each tier on different machines, then it can handle multiple requests without degrading performance of an application.
WCF is also used to build interoperable applications. An interoperable application is an application where one application can communicate with any other application that is built on any platform.
So, the two advantages of using WCF are:
An enterprise application can use the services
provided by other.
we can have better scalability.
Earlier, we used to have web services and .NET Remoting to build distributed applications.
Web service was used to exchange messages in XML format using HTTP protocol. A .NET remoting was used to exchange messages in binary format using TCP protocol.
Microsoft unified these communicating technologies and named it as WCF.
In the following method call, which argument is an array?
myObject.some_method(x, y, 3);
a) x is an array
b) y is an array
c) both x and y are arrays
d) neither x nor y is an array
e) can't say without seeing more code
Answer:
can't say without seeing more code
Explanation:
In the function calling, we pass the name of array, variable and direct value as well.
for example:
int y=3;
int x[] = {1,2,3,4};
fun(y,x);
so, we can't tell which is variable and which is array, without seeing the rest of code.
we can tell by seeing the initializing variable and function declaration or create function.
Write a program that sorts an array of 10 integers using bubble sort. In the bubble sort algorithm, smaller values gradually “bubble” their way upward to the top of the array like air bubbles rising in water, while the larger values sink to the bottom. The bubble sort makes several passes through the array (of 10 items). On each pass, successive pairs of elements are compared. If a pair is in increasing order (or the values are identical), we leave the values as they are. If a pair is in decreasing order, their values are swapped in the array. The comparisons on each pass proceed as follows—the 0th element value is compared to the 1st, the 1st is compared to the 2nd, the 2nd is compared to the third, ..., the second-to-last element is compared to the last element.
Answer:
#include<iostream>
using namespace std;
int main(){
//initialization
int arr1[10] = {2,4,6,1,7,9,0,3,5,8};
int temp;
int size_arr;
//nested for loop
for(int i=0;i<size_arr-1;i++){
for(int j=0;j<size_arr-i-1;j++){
if(arr1[j]>arr1[j+1]){ //compare
//swapping
temp = arr1[j];
arr1[j]=arr1[j+1];
arr1[j+1]=temp;
}
}
}
//display the each element
for(int i=0;i<10;i++){
cout<<arr1[i]<<" ";
}
return 0;
}
Explanation:
Create the main function and declare the variable and defining the array with 10 values.
take the nested for loop, nested loop means loop inside another loop.
the outer loop traverse in the array from 0 to size-1.
and inside loop traverse from 0 to size -i-1, because for every cycle of the outer loop the one element is sorted at the end. so, we do not consider the element from the last for every cycle of the outer loop. That's why (size-i-1)
In the bubble sort, the first element compares with the second element and if the first id greater than the second then swap the value. so, for the above algorithm, we take the if statement and it checks the condition if the condition becomes true then the swap algorithm executes.
we take a third variable for swapping. after that, if the outer loop condition false it means all elements will traverse and then the loop will terminate.
and finally, take another for loop and display the output.
Final answer:
The answer provides a Python program example that uses the bubble sort algorithm to sort an array of 10 integers. The program defines a function, bubble_sort, which sorts the array in ascending order and then prints the sorted array.
Explanation:
To sort an array of 10 integers using the bubble sort algorithm, you can use the following program as a reference. Bubble sort compares adjacent elements and swaps them if they are in the wrong order. Here's a basic example in Python:
def bubble_sort(arr):
n = len(arr)
for i in range(n):
swapped = False
for j in range(0, n-i-1):
if arr[j] > arr[j+1]:
arr[j], arr[j+1] = arr[j+1], arr[j]
swapped = True
if not swapped:
break
return arr
# Example array:
numbers = [64, 34, 25, 12, 22, 11, 90, 88, 66, 23]
sorted_numbers = bubble_sort(numbers)
print("Sorted array is:", sorted_numbers)
This program will sort the given array of integers in ascending order. The function bubble_sort takes an array as input, performs the bubble sort algorithm, and returns the sorted array.
_____ means retrieve the element at the top of a stackwithout removing it.
a. Peek
b. Top
c. Push
d. Pop
e. none of the above
Answer:
A - Peek
Explanation:
The peek method retrieves the element at the top of a stack without deleting/removing it, the only exception that can occur is when the stack used is empty. It would look as follows when you use the method >> STACK.peek().
what are the elements of a Software Process Improvement (SPI) modle?
Answer: Current Situation Evaluation, Improvement Planning, Improvement Implementation, Improvement Evaluation are the elements of SPI
Explanation:
SPI modle plans to achieve a desired task of software development in terms of Current Situation Evaluation, Improvement Planning, Improvement Implementation, Improvement Evaluation, with each having a specified and detailed role to play in the software development.
What would display if the following pseudocode was coded and executed? Declare String user = "Martha and George" Declare Integer number Set number = length(user) Display number
Answer:
17
Explanation:
length() is the function which is used to find the number of character the string.
character include space as well.
initially declare the string user with input "Martha and George".
then call length function which count the character within the double quotes""
total number is 17 (15 letters and 2 spaces).
and it then store in the integer.
finally print the value.
Therefore, the output is 17.
Which of the following is categorized as an indirect payment
portion of employee compensation?
a. Wages
b. Salaries
c. Employer-paid insurance
d. Commissions
Answer: C. Employer-paid insurance
Explanation: Employees can receive benefits i.e. financial payments in two ways, direct and indirect payments. Direct financial payments are all those paid directly by the employer to the employee, which means the employee can use those payments immediately after payment, such as wages, salaries, various bonuses, commissions, etc. Indirect benefits are all those paid by the employer to an employee from which the employee will benefit during or after a fixed period of time. These are, for example, life, health, so all kinds of insurance, paid holidays, pension funds, etc.
The following JavaScript program is supposed to print: 1 by 4 by 9
on a single line by itself. Unfortunately the program contains at least eight mistakes. Write the corrected line beside the line in error.
var N; // Text
N := 1;
document.writeln( N );
document.writeln( “ by “);
document.writeln( “N + 3”);
document.writeln( “ by “ );
document.writeln( N + 5);
Answer:
var N; // Text
N = 1;
document.write( N );
document.write(" by ");
document.write(N + 3);
document.write(" by ");
document.write(N + 8);
Explanation:
var N; // Text
N = 1;
document.write( N );
document.write(" by ");
document.write(N + 3);
document.write(" by ");
document.write(N + 8);
Draw directed graphs representing relations of the following types.
(a) Reflexive, transitive, and antisymmetric.
(b) Reflexive, transitive, and neither symmetric nor antisymmetric.
Answer:
The first graph in the picture describes a relation that is (a) Reflexive, transitive, and anti-symmetric.
Because a, b, c, d all are related to itself, so reflexive.
where (a, b) and (b, d) are in the relation, (a,d) is in the relation,
for (c,a) and (a,b) there is (c,b).
so it's transitive.
for all a,b in the relation, (a,b) there is no (b,a) with a ≠b.
The second graph in the picture describes a relation that is (b) Reflexive, transitive, and neither symmetric nor anti-symmetric.
Because a, b, c, d all are related to itself, so reflexive.
where (a, b) and (b, a) are in the relation, (a,a) is in the relation,
where (c, d) and (d, d) are in the relation, (c,d) is in the relation,
so it's transitive.
Because, (a,b) and (b.a) are there, but for (c,d) there is no (d,c) in relation.
So, the relation is not symmetric.
(a,b) and (b,a) is in relation but, a≠b, so not anti symmetric.
Explanation:
For all a in a set, if (a,a) in a relation then the relation is reflexive.
For all (a,b) in relation R, if (b,a) is also in R, then R is symmetric.
For all (a,b), (b,c) in relation R, if (a,c) is also in R, then R is transitive.
For all (a,b), (b,a) in R, a = b, then R is an anti- symmetric relation.
Indirect recursion requires the same careful analysis as direct recursion.
True
False
Answer: True
Explanation: Direct recursion is the process when a function call for itself and indirect recursion is the recursion process where a function calls another function and the result driven is the actual function . The aim of both the recursion process to provide with appropriate result by calling function so this declares that both the process indirect and direct recursion requite same careful analysis .
What is output when the CarTest application is run? Why?
public class Car {
private String color;
private int numWheels;
public Car(String color, int numWheels) {
this.color = color;
this.numWheels = numWheels;
}
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
public int getNumWheels() {
return numWheels;
}
public void setNumWheels(int numWheels) {
this.numWheels = numWheels;
}
}
public class CarTest {
public static void main(String[] argvs) {
CarTest carTest = new CarTest();
carTest.runDemo();
}
public void runDemo() {
Car c = new Car("blue", 4);
changeColor(c, "red");
System.out.println(c.getColor());
}
public void changeColor(Car car, String newColor) {
car.setColor(newColor);
}
}
What is output when the CarTest application is run? Why?
Answer:
red
Explanation:
public class CarTest {
public static void main(String[] argvs) {
//below line will create an object of CarTest class Object
CarTest carTest = new CarTest();
//This will call runDemo method
carTest.runDemo();
}
public void runDemo() {
//Below line will create an object of Car class with color blue and 4 wheel
Car c = new Car("blue", 4);
//Bellow Line will change the color from blue to red, see the logic writteen in chnageColor method definition
changeColor(c, "red");
//Below line will print the color as red
System.out.println(c.getColor());
}
public void changeColor(Car car, String newColor) {
//This line will set the color as passed color in the car object
car.setColor(newColor);
}
}
The update expression of a for loop can contain more than one statement, e.g. counter++, total+= sales
True False
True.
Update expression conditions the iterations of a for loop. Counter++ is the most basic form of use, but others like total += sales are also valid.
Hope this helps.
r3t40
A B-tree can be ____ in three ways: inorder, preorder, and postorder.
A.
copied
B.
reversed
C.
traversed
Answer:
traversed
Explanation:
B-tree is a self balancing tree and it is a data structure which allows insertion, deletion operations.
inorder, preorder and post order, they all are traversing algorithms in the tree data structure.
inorder: first print left, then root and then right.
preorder: first print root, then left and then right.
postorder: first print left, then right and then root.
Therefore, the answer is traversed.
__________ involves determining what qualities are to beused to perform project activities.
Resource planning
Cost estimating
Cost budgeting
Cost control
Answer:
Cost Budgeting
Explanation:
Great question, it is always good to ask away and get rid of any doubts that you may be having.
The answer to this question is Cost Budgeting the keyword in the sentence that verifies this is "qualities". Cost Budgeting is the process of determining were to spend less money or more money, based on importance. In other words determining the which quality of product is better for the overall project activity.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.
difference between global and local variables
Answer:
Global variables:
1. It is declare outside of all functions.
2. Cannot be declare the two global variable with same name.
3. It can be used in any where in the program, the is no problem with scope.
Local variables:
1. It is declare inside the functions.
2. Can be declare the two or more local variable with same name in the different functions.
3. It is available until that functions are executed.
Explanation:
Global variables are declare outside of all function,, we can access that variable anywhere in the program
for example:
int num = 10;
int main(){
statement;
fun(){
statement;
}
}
The variable is outside of all functions. So, it is a global variable.
It is not declare in the function or block, this is reason it has no problem with availability. it is available until the program is executed.
Other side, local variable is declare in the function.
for example:
int main(){
int num = 10;
statement;
fun(){
int num = 10;
statement;
}
}
Here, the variable num is local variable and it can be more than one time with same name but in the different function.
it is available untill that function executed.
How do you write a computer program to convert a decimal number into binary, octal, and hexadecimal?
Answer:
#include <iostream>
using namespace std;
void hexadecimal(int dec)
{
char hexa[100];// character array to store hexadecimal number.
int i = 0;
while(dec!=0)
{
int digit = 0;
digit = dec % 16;// storing remainder.
if(digit < 10)//condition
{
hexa[i] = digit + 48;//storing digit according to ascii values.
i++;
}
else
{
hexa[i] = digit + 55; //storing respective character according to ascii values..
i++;
}
dec = dec/16;
}
cout<<"The corresponding Hexadecimal number is :- ";
for(int j=i-1; j>=0; j--)// printing in reverse order .
cout << hexa[j];
cout<<endl;
}
void Binary(int dec)
{
int bin[32];// integer array to store binary values.
int i = 0;
while (dec > 0) {
bin[i] = dec % 2;// storing remainder
dec = dec / 2;
i++;
}
cout<<"The corresponding Binary number is :- ";
for (int j = i - 1; j >= 0; j--) // printing in reverse order
cout << bin[j];
cout<<endl;
}
void Octal(int dec)
{
int oct[100];// integer array to store octal values.
int i = 0;
while (dec != 0) {
oct[i] = dec % 8;// storing remainder
dec = dec / 8;
i++;
}
cout<<"The corresponding Octal number is :- ";
for (int j = i - 1; j >= 0; j--) // printing in reverse order
cout << oct[j];
cout<<endl;
}
int main() {
int d,bin,oct,hex;
cout<<"Enter decimal number"<<endl;
cin>>d;//taking input.
Binary(d);
Octal(d);
hexadecimal(d);
return 0;
}
OUTPUT:-
Enter decimal number
10
The corresponding Binary number is :- 1010
The corresponding Octal number is :- 12
The corresponding Hexadecimal number is :- A
Enter decimal number
256
The corresponding Binary number is :- 100000000
The corresponding Octal number is :- 400
The corresponding Hexadecimal number is :- 100
Explanation:
I have built 3 function of type void Hexadecimal,Binary,Octal all the functions take decimal integer as argument.They print their respective number after conversion.
So main approach is that :-
1.Take an array to store the digit on dividing.
2.Find the remainder on dividing it by corresponding number (for ex:- if binary divide by 2).
3.Store each remainder in the array.
4.Divide the number until it becomes 0.
5.Print the array in reverse.
The general case in a recursive function is the case for which the solution is obtained directly.
True
False
Answer: False.
Explanation:
The general case of recursive function is when the solution is obtained recursively by simplification at each step.
However, it is the base case in a recursive function when the solution is obtained directly.
The general case must be reducible to base to arrive at a solution else the recursion would be a infinite recursion.
What is the difference between a sequential access tile and a random access file?
Answer: Sequential access file enables the computer system to read or write file in sequential manner whereas random access file enables to read or write randomly in a data file.
Explanation:
Sequential file access is faster than random file access, however random access uses index searches. In random access higher number of seek operations are involved whereas in sequential access the number of seek operation is less.
What is the output frequency for a counter circuit that contains 12 flip-flops with an input clock frequency of 20.48 MHz?
Answer:
5KHz
Explanation:
The formula for calculating the output frequency when the input frequency and the number of flip-flops are given.
[tex]out put Frequency = \frac{in put frequency}{2^{N}}[/tex]
here, N is the number of filp-flops.
Note: The input frequency must be in Hz.
first convert given input frequency (MHz) into HZ.
[tex]in put frequency = 20.48 *10^{6}Hz[/tex]
apply the formula:
[tex]out put Frequency = \frac{20.48*10^{6}}{2^{12}}[/tex]
which comes out to be 5000Hz or 5KHz.
Which of the following method signatures correctly specifies an array as a return type?
a) private array testMethod ( int x )
b) private int[ ] testMethod ( int x )
c) private double[5] testMethod ( int x )
d) private double testMethod[ ] ( int x )
e) can't tell from this code
Answer:
private int[ ] testMethod ( int x )
Explanation:
Before going to the reason first understand the syntax of declare the function.
Syntax:
Access_modifier return_type name (argument_1, argument_2,...);
Access_modifier is used for making the restriction to access the values.
it is public, private and protected.
Return_type: it is used to define return type of the function.
it can be int, float, double.
In the question:
Option 1: private array testMethod ( int x )
it is not valid because array is not valid return type.
Option 2: private int[ ] testMethod ( int x )
int[ ] denotes the integer array. so, the function return the integer array.
Option 3: private double[5] testMethod ( int x )
it is not valid because double[5] is not valid return type. we cannot enter the size of the array.
if we replace double[5] to double[ ], then it valid and the function return double type array.
Option 4: private double testMethod[ ] ( int x )
it return type is double. So, it return the decimal value but not array.
Therefore, the correct option is (b).
A digital computer has a memory unit with 24 bits per word. The instruction set consists of 150 different operations. All instructions have an operation code part (opcode) and an address part (allowing for only one address). Each instruction is stored in one word of memory. How many bits are needed for the opcode?
Answer:
8 bit
Explanation:
we have given that the instruction consist 150 different operation
we know that [tex]2^{8}[/tex] = 256
but we have only 150 operation
so now we check [tex]2^{7}[/tex]=128
which is less than 150 so we need 8 bit for the opcode
so the 8 bit are needed for the opcode because when we take 7 bit then [tex]2^{7}[/tex]=128 which is less than 150 and not useful so we need 8 bit
An expression tag contains a scripting language expression thatis evaluated.TrueFalse
Answer: True
Explanation:
Yes, an expression tag contains a scripting language expression that is evaluated. As, expression tag is used to display the output of the data in the generated page. If data is placed in expression tag then, it prints on the output stream and then it automatically convert data into the string and the output are displayed.