C Programming - MCQ Practice Questions

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?

What is the primary purpose of function pointers in C?

Which of the following is a valid way to return multiple values from a function in C?

What happens if a function is declared but never defined in C?

Consider a function that modifies an array passed as a parameter. Which statement is true?

What is the purpose of function inlining in modern C compilers?

Which of the following demonstrates proper use of the return statement in error handling?

A function in C is declared as: int calculate(int *arr, int size). When this function modifies the array elements, what happens to the original array passed from the calling function?

What will be the output of the following code? char str[] = "Code"; printf("%c", str[2]);

What is the difference between char str[] = "Test" and char *str = "Test"?

Which function is used to reverse a string in C library?

What is the output of the following code? int arr[] = {10, 20, 30}; printf("%d", sizeof(arr)/sizeof(arr[0]));

What will be printed by: printf("%s", "Hello\0World");?

Consider: int *ptr = arr; where arr is an array. What does ptr[2] represent?

What will the following code output? char str[20]; strcpy(str, "Competitive"); strcat(str, " Exam"); printf("%s", str);

What is the time complexity of searching for an element in an unsorted array of size n?

What will be the output of this code? int arr[5]; for(int i=0; i<5; i++) arr[i] = i*i; printf("%d %d %d", arr[1], arr[2], arr[4]);