C Programming - MCQ Practice Questions

What is the default return type of a function in C if not specified?

What is the difference between function declaration and function definition?

What happens if a function does not have a return statement?

Which of the following function calls is valid? int calculate(int a, float b, char c);

What is a recursive function?

What is the issue with the following code? int factorial(int n) { return n * factorial(n-1); }

In C, are function parameters passed by value or by reference by default?

What will be the output? void modify(int x) { x = x + 10; } int main() { int a = 5; modify(a); printf("%d", a); }

Which of the following correctly declares a function pointer that points to a function returning int and taking two int parameters?

In C, when a function is called with fewer arguments than declared, what happens?

What will be printed by this code? void func(int arr[10]) { printf("%lu", sizeof(arr)); } int main() { int a[10]; func(a); }

What is the correct way to declare a function that accepts variable number of arguments?

Which of the following is true about a static function in C?

What happens if a function declared as returning int doesn't contain a return statement?

Which of the following correctly represents a callback function scenario?

Which of the following about function declaration and definition is TRUE?

What will happen when this code executes? void func() { func(); } int main() { func(); }

Which of the following is a valid function pointer initialization?

Consider the code: int calculate(int a, int b = 5) { return a + b; }. What is the issue?

What will be the output of this recursive function? int fact(int n) { if(n <= 1) return 1; return n * fact(n-1); } fact(5)