C Programming - MCQ Practice Questions

Which of the following correctly declares and initializes a 2D array?

What is the relationship between array name and pointer in C?

If str = "Hello", what is the value of str[5]?

In a 2D array int matrix[4][5], which statement about memory layout is true?

What is the output of sizeof(arr)/sizeof(arr[0]) when arr is declared as int arr[10]?

Which string function modifies the original string in-place?

What happens when you try to modify a string literal in C?

What is the time complexity of inserting an element at the beginning of an unsorted array?

Which function is used to find the first occurrence of a character in a string?

What will be the output? char arr[] = "ABC"; printf("%d", sizeof(arr));

Consider the code: int *p; int arr[5] = {10, 20, 30, 40, 50}; p = arr; What is *(p+2)?

Which of the following will correctly compare two strings?

What is the correct syntax to concatenate two strings safely in modern C?

What does the following code do? char str[] = "HELLO"; for(int i = 0; str[i]; i++) str[i] = str[i] + 32;

Consider: char str[10]; strcpy(str, "Hello"); What is the state of memory after this?

What does strtok(str, delim) return on each call until the string ends?

What is the correct way to declare a pointer to a character array?

What happens when you try to modify a string literal in C? char *str = "Hello"; str[0] = 'J';

Which of the following correctly reverses a string in-place?

What is the output of the following code? char str[] = "GATE"; printf("%d", sizeof(str));