C debugging Qs

Find the correct output :

#include <stdio.h>

int main(){

    int x = 5;

     printf("The value of x is: %d\n", x)

    return 0;

}

• Logical Error

• Syntax Error

• code is correct

• Does not print anything

Answer explanation

Add a semicolon at the end of the printf line.

#include <stdio.h>

Choose the correct option:

int main() {

    int a, b, sum;

    a = 5;

    b = 7;

    sum = a + b;

    printf("The sum of %d and %d is %d\n", a, b);

    return 0;

}

• Code is correct

• Logical error

• format error

• syntax error

Answer explanation

The printf format specifier does not match the number of arguments.

choose the correct option:

#include <stdio.h>

int main() {

    float result;

    int num1 = 10, num2 = 3;

    result = num1 / num2;

    printf("The result is: %f", result);

    return 0;

}

• incorrect results

• displays correct results

• will not work

• none of the mentioned

Answer explanation

The division is performed using integers, leading to incorrect results.

#include <stdio.h>

int main() {

int n;

printf("Enter a number: ");

scanf("%d", n);

if (n % 2 == 0)

printf("The number is even.");

else

printf("The number is odd.");

return 0;

}

• Displays correct answer

• Syntax error

• logical error

• None of the mentioned

Answer explanation

scanf requires the address of the variable.

Choose the correct option:

#include <stdio.h>

int main() {

    int num;

     printf("Enter a number: ");

     scanf("%d", &num);

    if (num > 0);

         printf("The number is positive.");

 return 0;

}

• The number is postive

• logical error

• syntax error

• none of the choice mentioned

Answer explanation

 There's a semicolon at the end of the if statement.

#include <stdio.h>

int main() {

int a = 5, b = 0, result;

result = a / b;

printf("The result is: %d", result);

return 0;

}

• Error

• The result is 0

• The result is 5

• logical error

Answer explanation

Division by zero error

#include <stdio.h>

int main() {

int x = 10;

if (x = 5)

printf("x is equal to 5.");

else

printf("x is not equal to 5.");

return 0;

}

• x is equal to 5

• x is not equal to 5

• 5

• Errror

Answer explanation

Assignment operator = instead of comparison operator == in the if condition.

Choose the correct option:

#include <stdio.h>

int main() {

int num;

printf("Enter a number: ");

scanf("%d", num);

printf("You entered: %d", num);

return 0;

}

• Enter a number : 5

  5

• 5

• error

• none of the choice mentioned

Answer explanation

scanf requires the address of the variable.