Bitwise Operators · Exercise 2 of 4

Bitwise Operators Predict the Output

12 questions
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Category: C Programming
Topic: Bitwise Operators
Exercise: Predict the Output
Questions: 12

Exercise list4 exercises in Bitwise Operators

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Read each program and choose what it prints. Every program was compiled and run with GCC/Clang behaviour on a 64-bit system, so the answers are the real output.

Question 11 Hard

What does this program print with GCC or Clang on x86-64 / ARM64?

main.c

#include <stdio.h>

int main(void) {
    int x = -16;
    printf("%d %d\n", x >> 2, x / 4);
    return 0;
}

A -4 -4

B 4 -4

C 1073741820 -4

D -4 4

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Question 12 Medium

What is the output of the following program, compiled as C23?

main.c

#include <stdio.h>

int main(void) {
    unsigned flags = 0b0000'1010;
    unsigned mask  = 0b0000'0110;
    printf("%u %u %u\n", flags & mask, flags | mask, flags ^ mask);
    return 0;
}

A 2 14 12

B 2 14 8

C 6 10 12

D Compilation error

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