C Programming - MCQ Practice Questions

Which statement about function parameters passed as arrays is correct?

What is the purpose of the 'extern' keyword when used with a function?

Consider: void modify(int *ptr) { *ptr = 20; } int main() { int x = 10; modify(&x); printf("%d", x); }. Output?

What does variadic function mean in C?

Which of the following correctly demonstrates inline function usage for optimization?

What is the output of this code? void swap(int a, int b) { int temp = a; a = b; b = temp; } int main() { int x = 5, y = 10; swap(x, y); printf("%d %d", x, y); }

In C, how many parameters can a function have at maximum?

What is the scope of a static variable declared inside a function?

Which calling convention passes parameters through the stack from right to left?

What is the difference between call by value and call by reference in C?

Analyze the following pointer to function declaration: int (*ptr)(int, int);

Which of the following is true about function pointers in C?

What is the primary advantage of using inline functions?

Consider the function: void func(int *arr, int size). Which statement is correct?

Which approach correctly implements a function returning multiple values?

Which of the following correctly declares a variadic function?

What will be the output of this code? int counter = 0; void increment() { static int count = 0; count++; counter++; } main() { increment(); increment(); printf("%d %d", count, counter); }

Which of the following correctly demonstrates function recursion termination?

What does the const qualifier do when applied to function parameters?

Which statement about extern functions is correct?