Which operator is used in C to obtain the memory address of a variable?
Correct answer B. &
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C Language MCQs
C Language MCQs test core knowledge of the C programming language, including pointers, keywords, variable naming, function prototypes and its history. They help computer science students, IT job applicants and candidates for programming sections of recruitment tests. Every question shows its correct answer instantly, so you can check your understanding as you practise.
Which operator is used in C to access a structure member through a pointer to the structure?
Correct answer D. ->
In C, what is the value of the bitwise expression 5 ^ 3?
Correct answer C. 6
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In C, what is the value of the expression 1
Correct answer A. 8
Which C statement skips the remaining statements of the current loop iteration and moves to the next iteration?
Correct answer D. continue
What is printed by the C statement printf(“%d”, 10 > 5 && 3 > 4);?
Correct answer B. 0
Which storage class keyword makes a local variable keep its value between function calls?
Correct answer A. static
In C, what is the index of the first element of an array?
Correct answer D. 0
Which C library function releases memory that was allocated with malloc()?
Correct answer A. free()
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Which C library function allocates memory for an array and sets all its bytes to zero?
Correct answer D. calloc()
After the C statements int a = 5; int b = ++a; what is the value of b?
Correct answer A. 6
After the C statements int x = 5; int y = x++; what is the value of y?
Correct answer B. 5
Which keyword is used in C to define a user-defined type that groups variables of different types?
Correct answer C. struct
Which character marks the end of a string in C?
Correct answer A. '\0'
What value does strlen(“hello”) return in C?
Correct answer C. 5
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In C, what does sizeof(char) always evaluate to?
Correct answer D. 1
Which standard header file must be included to use printf() and scanf() in C?
Correct answer C. stdio.h
In C, what is the value of the expression 17 % 5?
Correct answer C. 2
In C, what is the value of the expression 7 / 2 when both operands are of type int?
Correct answer B. 3
Which format specifier is used with printf to print an int value in decimal form?
Correct answer C. %d
About C Language MCQs
This short set covers fundamentals often asked in interviews and written tests. Questions cover null pointers, which point to nothing, and dangling pointers, which still point to memory that has been freed. You will also find items on far pointers, function prototypes, reserved keywords, and the rule that a variable name can begin with a letter or an underscore but not a digit. History questions ask who developed C, Dennis Ritchie at Bell Labs in the early 1970s. These basics are tested in campus placements and computer science lecturer and IT job tests.
Exams that include C Language MCQs
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Frequently asked questions
Who developed the C language?
The C language was developed by Dennis Ritchie at Bell Laboratories in the early 1970s, mainly to write the UNIX operating system. He is widely known as the father of C. C remains important because many later languages, such as C++ and Java, borrow its syntax.
What is the difference between a null pointer and a dangling pointer?
A null pointer holds no valid address and points to nothing. A dangling pointer still holds the address of memory that has been freed or has gone out of scope. Using a dangling pointer leads to undefined behaviour, so it is good practice to set freed pointers to NULL.
Last reviewed October 2026