National Level Online Quiz On Programmers'Day Quizzard

Programmers'Day Quizzard

 Question : 1).Predict the output of following C++ program

#include<iostream>

using namespace std;

class Empty {};

 int main(). { cout << sizeof(Empty);

return 0; } 

Answer : Answer : A non-zero value

 

Question : 2).

class Test { int x; };

int main() { Test t;

cout << t.x; return 0;

} 

Answer : Compiler Error

 

Question : 3)

Assume that an integer and a pointer each takes 4 bytes. Also, assume that there is no alignment in objects. Predict the output following program.

#include<iostream>

using namespace std;

class Test { static int x;

 int *ptr; int y;

 };

 int main() { Test t; cout << sizeof(t) << " ";

cout << sizeof(Test *);

} 

Answer : No

 

Question : 4).Which of the following is true about the following program

#include <iostream>

class Test { public: int i;

void get();

}; void Test::get() {std::cout << "Enter the value of i:"; std::cin >> i; Test t; // Global objectint main() { Test t; // lo

cal object t.get();

std::cout << "value of i in local t: "<<t.i<<'n'; ::t.get();

std::cout << "value of i in global t: "<<::t.i<<'n';

return 0; } 

Answer : Compiles and runs fine

 

Question : 5).What is the output of the following program?

#include<iostream>

using namespace std;

main() { char s[] = "hello", t[] = "hello";

if(s==t) cout<<"eqaul strings";

} 

Answer : Un Equal strings

 

Question : 6).What is the output of the following program?

#include<iostream> using namespace std;

main() { union abc { int x;

char ch; } var; var.ch = 'A';

cout<<var.x;

} 

Answer : Garbage value

 

Question : 7).What is the output of the following program?

#include<iostream>

using namespac e std;main() {

char *s = "Fine";

*s = 'N'; cout<<s<<endl;

} 

Answer : Runtime Error

 

Question : 8).What is the output of the following program?

#include <iostream>

using namespace std;

int main(){

double firstNumber,

secondNumber,

productOfTwoNumbers;

 cout << "Enter two numbers: ";

// Stores two floating point numbers in variable

firstNumber and secondNumber respectively cin >> firstNumber >> secondNumber; //

Performs multiplication and stores the result in variable productOfTwoNumbers productOfTwoNumbers = firstNumber * secondNumber; cout << "Product = " << productOfTwoNumbers;

return 0;

} 

Answer : 18

 

Question : 9).What is the output of the following program?

#include <iostream>

using namespace std;

int main() {

int num, originalNum, remainder,

result = 0;

cout << "Enter a three-digit integer: ";

cin >> num; originalNum = num; while (originalNum != 0)

{ // remainder contains the last digit remainder = originalNum % 10; result += remainder * remainder * remainder; // removing last digit from the orignal number originalNum /= 10; }

if (result == num) cout << num << " is an Armstrong number.";

else cout << num << " is not an Armstrong number.";

return 0;

} 

Answer : 371

 

Question : 10).What is the output of the following program?.

public class AddTwoNumbers {

public static void main(String[] args) {

int num1 = 5, num2 = 15, sum;

sum = num1 + num2;

System.out.println("Sum of these numbers: "+sum);

}

} 

Answer : 20

 

Question : 11).What is the output of the following program?

class HelloWorld { public static void main(String[] args) {

 System.out.println("Hello, World!");

}

} 

Answer : Hello, World!

 

Question : 12).What is the output of the following program?

class Main { public static void main(String[] args)

{ int n = 1;

 // for loop for (int i = 1; i <= n; ++i) {

System.out.println("Java is fun");

} }} 

Answer : Java is fun

 

Question : 13).What is the output of the following program?

#include<stdio.h>

main() { int x = 3; x += 2; x =+ 2;

printf("%d", x); } 

Answer : 2

 

1 Question : 4).In normalized form, if the binary equivalent of 5.375 is “0100 0000 1010 1100 0000 0000 0000 0000” then what will be the output of the program in Intel core machine? 

Answer : 00 00 AC 40

 

Question : 15).In the given below code, the function fopen()uses "r" to open the file “source.txt” in binary mode for which purpose? 

Answer : For reading