Learn C MCQs
Prepare C MCQs (Multiple choice Questions) for exam and job interviews.
What is the size of an integer on a 64-bit system?
1) 2 bytes
2) 4 bytes
3) 8 bytes
4) Depends on the compiler
Answer : Option 2
Which of the following correctly declares a pointer?
1) int *ptr;
2) int ptr*;
3) ptr int*;
4) int *ptr();
Answer : Option 1
What is the output of printf("%d", 4 ^ 5);?
1) 1
2) 9
3) 8
4) 3
Answer : Option 1
Which of the following is used to allocate memory dynamically in C?
1) malloc()
2) calloc()
3) realloc()
4) All of the above
Answer : Option 4
What will be the output of printf("%d", 10 && 0);?
1) 0
2) 1
3) 10
4) Error
Answer : Option 1
Which of the following can be used to read a string in C?
1) gets()
2) scanf()
3) fgets()
4) All of the above
Answer : Option 4
What will be the output of printf("%d", 4 * (2 + 3));?
1) 20
2) 15
3) 10
4) 12
Answer : Option 1
Which of the following is a valid statement to declare an array of 10 integers?
1) int arr[10];
2) int arr();
3) arr int[10];
4) int arr = new int[10];
Answer : Option 1
What will be the output of printf("%d", 10 / 2 * 3);?
1) 15
2) 5
3) 10
4) 20
Answer : Option 1
Which of the following is not a valid arithmetic operator in C?
1) +
2) -
3) /
4) %
Answer : Option 5