Learn C MCQs
Prepare C MCQs (Multiple choice Questions) for exam and job interviews.
Which of the following is not a valid way to declare a variable in C?
1) int x;
2) float x;
3) double x;
4) decimal x;
Answer : Option 4
What is the purpose of the `break` statement in a loop?
1) To exit the loop
2) To skip the current iteration
3) To restart the loop
4) None of the above
Answer : Option 1
What is the correct way to comment a single line in C?
1) // comment
2) # comment
3) /* comment */
4) comment
Answer : Option 1
Which of the following is the correct syntax for a while loop?
1) while (condition) {}
2) do {} while (condition);
3) for (initialization; condition; increment) {}
4) Both 1 and 2
Answer : Option 4
What is the output of printf("%d", 7 >> 1);?
1) 3
2) 4
3) 2
4) 5
Answer : Option 1
What is the output of printf("%d", sizeof(int));?
1) 2
2) 4
3) 8
4) Depends on the compiler
Answer : Option 4
What does the `free()` function do?
1) Allocates memory
2) Deallocates memory
3) Resizes memory
4) None of the above
Answer : Option 2
What is the output of printf("%d", 5 + (10 * 2));?
1) 25
2) 20
3) 25
4) 15
Answer : Option 1
Which of the following is used to terminate a program in C?
1) exit()
2) stop()
3) quit()
4) terminate()
Answer : Option 1
What will be the output of printf("%d", 3 && 4);?
1) 1
2) 0
3) 3
4) 4
Answer : Option 1