Free Practice / PYQ
What is the output of the following C program?
#include <stdio.h>
int main(void) {
int x = 0, y = 10;
if (x && ++y)
y++;
printf("%d", y);
return 0;
}In a logical AND expression (x && ++y), the left operand evaluates to 0. Due to short-circuit evaluation, ++y is skipped entirely, leaving y as 10.
Which of the following describes the behavior of integer division in C99 when negative operands are involved?
C99 mandates that integer division truncates towards zero. For example, -7 / 3 evaluates to -2.
What is the output of the following code snippet?
#include <stdio.h>
int main(void) {
int a = 12, b = 25;
printf("%d", a & b);
return 0;
}Bitwise AND of 12 (00001100_2) and 25 (00011001_2) yields 00001000_2, which is 8 in decimal.
What is the result of evaluating '5 + 4 * 3 % 2 - 1' in C?
Multiplication and modulo have higher precedence than addition and subtraction. 4 * 3 = 12. 12 % 2 = 0. Expression becomes 5 + 0 - 1 = 4.
What is the value printed by this program?
#include <stdio.h>
int main(void) {
int x = 5;
int y = x++;
printf("%d %d", x, y);
return 0;
}Post-increment x++ assigns the current value of x (5) to y, and then increments x to 6.