C Programming - MCQ Practice Questions
C questions in placement tests and university exams are rarely about syntax alone. Most of what you will find here is output prediction, pointer arithmetic, arrays and strings, structures and unions, storage classes, recursion, and file handling. The explanations walk through memory behaviour step by step, which is usually where the confusion sits rather than in the code itself.
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What will be the output of the following code?
int add(int a, int b) { return a + b; }
int main() { printf("%d", add(5, add(3, 2))); return 0; }
What is the output of this recursive function?
int fact(int n) { if(n<=1) return 1; return n*fact(n-1); }
main() { printf("%d", fact(4)); }
In C, what is the purpose of the return statement in a void function?
Which of the following is a correct function prototype in C?
What is the scope of a static function in C?
Which keyword is used to pass arguments by reference in C?
What is the difference between declaring a function and defining a function?
Consider the function declaration: void func(int x); and later in the code: int result = func(5);. What will be the compilation result?