Answer:
a.
CFG for {[tex]a^{n}[/tex][tex]b^{m}[/tex], m=n-1 and n=1,2,3… …}
Here we can have a string containing only a single a and no b.
For that the production rule is S → aT, T → ε
Now to get the strings with at least one b, the production rule is to be
T → ATB/ ε
A → a
B → b
Now merging two set of production rules:
S → aT
T → ATB/ε [As T → ε is in both set, so one occurrence is taken]
A → a
B → b
Now let us generate “aaabb”
S → aT → a ATB → aAATBB → aaATBB → aaaTBB → aaaεBB → aaaεbB →aaaεbb → aaabb
b.
CFG for {[tex]a^{n}[/tex][tex]b^{2n}[/tex], n=1,2,3… …}
Here for every single a, we have to generate two b’s.
So the production rule is to be:
S → aSbb/ε
Each time S will generate two b’s for one a.
What is DATE data type and its syntax and what is TIMESTAMP data type and its syntax in SQL language.Explain the difference between both of them .
Answer: The DATE datatype give us the particular date whereas TIMESTAMP gives us the date as well as the time as the particular moment.
Explanation:
DATE datatype gives us the date in the format yyyy-mm-dd. The timestamp format is yyyy-mm-dd hh:mm:ss. time stamp are of two types :
timestamp with time zone and timestamp without time zone.
Date is the date on that particular day whereas the timestamp is the date along with the specific time when the query is executed.
When multiple exceptions are caught in the same try statement and some of them are related through inheritance, does the order in which they are listed matter?
Answer:
Yes, the order in which the catch blocks are listed matter in case where multiple exceptions are caught in the same try statement and some of them are related through inheritance.
Explanation:
A try block may be followed by one or mutiple catch blocks. Each catch block should contain a separate exception handler. Thus, if we need to perform different tasks for the occurrence of different exceptions then we need to use java multiple catch blocks.
Every catch block should be ordered from the most particular to the most generic like catch for the NumberFormatException class must come before the catch for the Exception class.
Thus, the order in which the catch blocks are listed matter in case where multiple exceptions are caught in the same try statement and some of them are related through inheritance.
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.
The main benefit of shielded twisted pair cabling over unshielded twisted pair is that STP is much more durable.
a) True b) False
Answer: True
Explanation:
In shielded twisted pair (STP) we have two wires which are twisted together and they have a shielding layer outside them which helps them to avoid interference from outside noise. STP thus having the advantage with an additional layer of shield covering the two wires together makes them more durable compared to unshielded twisted pair.
A program written in ____ is the most basic circuitry-level language.
a.
Java
b.
machine language
c.
BASIC
d.
C
Answer:
The correct answer is B. Machine Language.
Explanation:
A programming language is a language that can be used to control the behavior of a machine. It consists of a set of syntactic and semantic rules that define its structure and the meaning of its elements, respectively.
A low level language is one that exposes the programmer to the operations of the machine, without contributing its own constructions. That is, in low level languages it will be possible to do everything the computer is capable of doing, but to achieve this the programmer will have to be intimately familiar with the details of the electronics in which his program runs.
An example of the low level language is the machine language that consists of binary instructions ready to run. The machine language is the one that gives orders to the machine, which are the fundamental operations for its operation. The computer only understands a language known as binary code or machine code, consisting of zeros and ones, which are easy to understand by the hardware of the machine. This language is much faster than high level languages. The disadvantage is that they are quite difficult to handle and use, besides having huge sources codes where finding a fault is almost impossible.
Final answer:
Machine language is the most basic circuitry-level language, written in binary code. High-level programming languages like C provide a more user-friendly alternative for programming.
Explanation:
The program written in machine language is the most basic circuitry-level language. Machine language is directly executed by the central processing unit (CPU) and is composed of binary code, which consists of zeros and ones. This type of programming is considered a low-level language, as opposed to high-level programming languages like Java, BASIC, or C, which require a compiler to convert their instructions into machine code that the CPU can understand and execute.
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
Which of the following is not a standard method called aspart of the JSP life cycle*
*jspInit()
*jspService()
*_jspService()
*jspDestroy()
Answer:
*jspService()
Explanation:
These are the steps in JSP life cycle.
1. Conversion JSP page to Servlet .
2.Compilation of JSP page(test.java)
3.Class is loaded (test.java to test.class)
4.Instantiation (Object is created)
5.Initialization (jspInit() method is only called once at the time of servlet generation )
6.Request processing(_jspService() method is used for serving requests by JSP)
7.JSP Cleanup (jspDestroy() method is used for removing JSP from use)
There is no *jspService() method in the JSP life cycle.
Random access iterators are ____ iterators that can randomly process elements of a container.
A.
input
B.
forward
C.
bidirectional
Answer:
C. Bidirectional
Explanation:
If we want to access elements at an any random offset position then we can use random access iterators.They use the functionality 'as relative to the element they point to' like pointers.Random access iterators are Bidirectional iterators that can randomly process elements,pointer types are also random-access iterators.
Differentiate between global alignment and local alignment.
Answer: In global alignment an end to end alignment is made in the entire sequence however in local alignment a local region is found wit the highest level of similarity in their sequences.
Explanation:
Global alignment is more suitable for closely related sequences whereas local is suitable for divergent sequences.
global alignment is used for comparing genes base on same functionalities whereas local alignment is used to find sequences in DNA.
EMBOSS needle is a global alignment tool and BLAST is a local alignment tool
You observe that classmates who get good grades tend to sit toward the front of the classroom, while those who receive poor grades tend to sit toward the back. What are three possible cause-and-effect relationships for this nonexperimental observation?
1.Students at front rows will have to sit attentive and have to concentrate on the lecture being delivered,thus their knowledge about the lecture is way better than the students at back rows.
2. Front row students are more in line with the teacher and they have much better concepts regarding the lecture delivered and they have more score in exams.
3. Generally the more interested a student is about the lectures being delivered,the more front he/she is in classroom and thus this results in more grades.
Three possible cause-and-effect relationships explaining why students with good grades sit at the front include higher motivation, increased teacher attention, and the third-factor explanation such as self-confidence or socioeconomic status, which could indicate a spurious relationship.
Explanation:You observe that classmates who get good grades tend to sit toward the front of the classroom, while those who receive poor grades tend to sit toward the back. Three possible cause-and-effect relationships for this nonexperimental observation could include:
Students with higher motivation levels might choose to sit at the front to minimize distractions and engage more directly with the lesson, leading to better performance.Teachers may pay more attention to students at the front, which might result in better understanding and higher grades for these students due to increased interaction.There could be a spurious relationship where both seat choice and academic performance are influenced by a third factor, such as self-confidence or socioeconomic status, as shown in Rist's study which linked social class with proximity to the teacher.It is difficult to determine without further investigation whether the observed correlation indicates a causal relationship or a spurious relationship. Investigating the root causes of this observation would require a more rigorous research design with clear independent and dependent variables, as well as controls to account for potential confounding factors.
What is variable hoisting in JavaScript? Provide examples.
Answer:
before executing a code using javascript hoisting we can move any variable declaration to the top of the scope in a code.
Explanation:
It is to be remembered that hoisting works with declaration not with initialization.
example:
//initializing a variable s
var s = 2;
t = 4
elem.innerHTML = s + " " + t; // Display s and t values
// initializing a variable for hoisting
var t;
Write a program that converts temperatures in the Celsius scale to temperatures in the Fahrenheit scale. Your program should ask the user to supply the Celsius temperature, and convert the temperature entered to degrees Fahrenheit using the formula Fahrenheit = 1.8 * Celsius + 32. It should then display the Fahrenheit temperature.
Answer:
#include <iostream>
using namespace std;
int main()
{
float celsius;
cout<<"Enter the temperature in Celsius: ";
cin>>celsius;
float Fahrenheit = 1.8 * celsius + 32;
cout<<"The temperature in Fahrenheit is: "<<Fahrenheit<<endl;
}
Explanation:
first include the library iostream in the c++ programming.
Then, create the main function and declare the variable celsius.
cout is used to print the message on the screen.
cin is used to store the user enter value in the variable.
then, apply the formula for calculating the temperature in Fahrenheit
and store the result in the variable.
Finally, print the result.
the largest distribution of software cost will be when in the programs life cycle?
Answer: Early
Explanation:
The largest distribution of software cost will be in the early stages of program life cycle. The different phases in the program life cycle are edit time, compile time, link time, distribution time, installation time, load time, and run time. So during early program life cycle we have editing stage which involves correcting the code , debugging earlier codes and addition of features into the code which leads to a large software cost
___ is an example of a function prototype.
A) float roi(int, double);
B) printf("%f", roi(3, amt));
C) roi(3, amt);
D) float roi( int yrs, double rate)
Answer:
A
Explanation:
B is a print statement.
C is a function invocation
D is a function declaration
A prototype is actually quite close to a declaration. The semi-colon at the end shows that no implementation will follow. Adding parameter names is allowed but would only be helpful for better understanding.
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);
}
}
What are table buffers?
Answer:
Table buffers are tools used to avoid the process of accessing a database in servers.
Do you think that people accept poor quality in information technology projects and products in exchange for faster innovation? What other reasons might there be for such poor quality?
Answer:
Explanation:
Great question, it is always good to ask away and get rid of any doubts that you may be having.
This depends on the company, but some companies will accept poor quality as long as the product works and provides them faster innovation. This will happen especially if a company knows or has an idea that a competitor is working on a similar product.
Another big reason why a company might accept poor quality in order to release a product is money. Sometimes a company does not have the budget to continue the project, therefore they release it usually in Early Access. This allows them to start making some money on the project while they continue to work on it.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.
In this exercise, we are analyzing the context in which we have the quality of technological products linked to monetary value, as follows:
We know that some companies are focused on having a worse quality as long as they make a quick profit, as the consumer is not a priority.
Who seeks price does not find quality?When it comes to Price or Quality, many entrepreneurs most of the time have a false perception that the cheaper a product they tend to offer to the consumer, the greater the chances of success.
We must take into account that the option of a lower quality is often linked to the budget that a company may have.
See more about technology at brainly.com/question/9171028
Do the following SQL questions. The resulting columns must all have descriptive names. You must show the result of the query. For example, if the query is:
Show the office id, the city, and the region
Your query should be:
select office, city, region
Answer:
We can use CREATE command to create tables with columns having descriptive names
Explanation:
Firstly, create a table using CREATE command in SQL. The syntax is as follows:
CREATE TABLE [table_name]
(
[col_name] [datatype]),
[col_name] [datatype]),
[col_name] [datatype]),
[col_name] [datatype])
)
Once the table is created, we can insert the data into table using INSERT command. It's syntax is as follows:
INSERT INTO table_name VALUES('', '', '')
if datatype is string, values must be entered within single quotes. If datatype is int, values are entered directly without using quotes.
Now, you can select the data from the table using SELECT command. It's syntax is as follows:
SELECT column-list FROM table_name
If you want to filter rows according to conditions, you can use WHERE command.
I have created sample table and inserted some data into it. Now, I applied some queries on it to select data from the table.
I have written in a text file and attached the same. Please find. Thank you!
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.
Write a python function c that converts bitstring array back to an integer numpy array
Answer:
import numpy as np#importing numpy module with an alias np.
def c(bitstring_array):# defining function c.
num_integer=bitstring_array.dot(2**np.arange(bitstring_array.size)[::-1])#bitstring conversion.
return num_integer#returning integer array.
print("Enter bits")
Bit_l=input().split(" ")#enter space separated bitstring.
for i in range(len(Bit_l)):#iterating over the bitstring.
Bit_l[i]=int(Bit_l[i])
bitstring_array=np.array(Bit_l)
print(c(bitstring_array))#function call.
Output:
Enter bits
1 1 1 0 0 1
57
Some data files should be totally hidden from view, while others should have ____ so users can view, but not change, the data.
Answer
no-access properties
read-only properties
full-access properties
write-only properties
Answer:
read-only properties.
Explanation:
Only the read only properties can view but cannot change the data.The user don't have access to the no access properties, full-access properties can read and modify the data.The write only properties can only modify the data.So to only view the data the data should have read only properties.
The term asymptotic means the study of the function f as n becomes larger and larger without bound.
True
False
Answer:
False
Explanation:
The term asymptotic means approaching a value or curve arbitrarily closely
When an expression containing a ____ is part of an if statement, the assignment is illegal.
a.
greater than sign
b.
double equal sign
c.
single equal sign
d.
Boolean value
Answer:
single equal sign
Explanation:
The if statement is used for check the condition.
syntax:
if(condition)
{
statement;
}
let discuss the option one by one for find the answer:
Option a: greater than sign
this assignment operator '>' is valid. it is used to create the condition like n>0, p>4.
Option b: double equal sign
this assignment operator '==' is valid. it is used to check the equal condition.
like 2 == 2.
Option c: single equal sign
this assignment operator '=' is not valid. it is used for assign the value to variable not for checking like a=2, in this 2 assign to a but it not apply the condition.
Option d: Boolean value
we can provide the Boolean value as well if Boolean is TRUE, if condition true otherwise false.
Therefore, the option c is correct option.
____ 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.
What is disaster recovery? How could it be implemented at your school or work?
Answer:
Disaster recovery is a set of procedure/plans/actions which are put in place to protect an organization which is facing a disaster. In a technological terms, a government organizations facing cyber attack will follow certain counter measures to recover from cyber disaster. Similarly, in school a disaster recovery can be natural calamity or cyber threat at school's database.
To implement disaster recovery at school or work we must aware everyone with proper procedures and mock drills must be conducted so that people can act swiftly when a disaster occurs and speed up disaster recovery.
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;
}
Write a program that generates two 3x3 matrices, A and B, withrandom values in the range [1, 100] and calculates the expression½A + 3B
Answer:
#include <bits/stdc++.h>
using namespace std;
int main() {
int A[3][3],B[3][3],res[3][3],i,j;
srand(time(0));//for seed.
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
int val=rand()%100+1;//generating random values in range 1 to 100.
int val2=rand()%100+1;
A[i][j]=val;
B[i][j]=val2;
}
cout<<endl;
}
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
res[i][j]=0.5*A[i][j]+3*B[i][j];//storing the result in matrix res.
}
}
cout<<"Matrix A is"<<endl;
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
cout<<A[i][j]<<" ";//printing matrix A..
}
cout<<endl;
}
cout<<"Matrix B is"<<endl;
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
cout<<B[i][j]<<" ";//printing matrix B..
}
cout<<endl;
}
cout<<"The result is"<<endl;
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
cout<<res[i][j]<<" ";//printing the result..
}
cout<<endl;
}
return 0;
}
Output:-
Matrix A is
13 95 83
88 7 14
24 22 100
Matrix B is
11 13 95
48 35 20
68 100 18
The result is
39.5 86.5 326.5
188 108.5 67
216 311 104
Explanation:
I have created 2 matrices A and B and storing random numbers int the matrices A and B.Then after that storing the result in res matrix of type double to store decimal values also.Then printing the res matrix.
Composite analog signals are SineWaves. True/false
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).
Create an application program that will compute theradius and circumference of a circle. Write a Main class withHelper methods to prompt for and input the radius of acircle(getRadius), calculate thecircumference(calcCirc), and calculate thearea(calcArea) of a circle. Define the radius,area, and circumference in main which will call each calc method,passing radius to each one. Assume PI = 3.14159 or use theMath.PI builtin constant. Format theoutput to show two decimal places in the calculatedvalues.
Final answer:
An application to compute the radius and circumference of a circle requires creating a Main class with methods to input radius, calculate circumference, and area, formatting results to two decimal places using Math.PI.
Explanation:
To create an application that calculates the radius and circumference of a circle, you will need to define methods within your Main class. The getRadius method will prompt the user for input, calcCirc for calculating the circumference using the formula C = 2 * PI * r, and calcArea for calculating the area with A = PI * r * r. You should use the Math.PI constant for PI, and ensure all results are formatted to two decimal places.
Sample code structure in Java:
public class Main {
public static void main(String[] args) {
double radius = getRadius(); // prompts user and gets radius
double circumference = calcCirc(radius);
double area = calcArea(radius);
System.out.printf("Radius: %.2f\n", radius);
System.out.printf("Circumference: %.2f\n", circumference);
System.out.printf("Area: %.2f\n", area);
}
// Helper methods here
}
Ensure that you correctly use double data types for storing the input from the user, as well as the calculated values, since these can include decimal points.