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C Programming - MCQ Practice Questions

Practice free C Programming multiple-choice questions with detailed answers and explanations. Perfect for competitive exam preparation.

978 questions | 100% Free

Q.221Medium

Consider: int arr[10]; int *ptr = arr; What does ptr[5] represent?

Q.222Medium

What will be printed? char str[] = "Hello"; printf("%c", *(str+2));

Q.223Medium

What is the difference between arr[5] and *arr when arr is an array?

Q.224Medium

Which statement about 2D arrays in C is correct?

Q.225Medium

What is the output? char str[6] = {'H','e','l','l','o'}; printf("%s", str);

Q.226Medium

Consider a 3D array: int arr[2][3][4]. How many elements total?

Q.227Medium

What will be the result of accessing arr[10] when arr is declared as int arr[5]?

Q.228Medium

What is the difference between char str[20] and char *str in C?

Q.229Medium

What does strcpy(dest, src) do, and what is its main risk?

Q.230Medium

In a string comparison, strcmp('Apple', 'apple') returns:

Q.231Medium

What is the memory layout of a 2D array int arr[3][4] in C?

Q.232Medium

What is the output of printf("%d", sizeof(arr)) for char arr[100]?

Q.233Medium

Which function is safe to use for string concatenation with size limiting?

Q.234Medium

In C, what happens when you pass an array to a function?

Q.235Medium

What does the expression *(arr + 3) represent for an integer array?

Q.236Medium

Which of the following operations is NOT allowed on array names in C?

Q.237Medium

In a string with escape sequences like "Hello\nWorld", how many characters are counted by strlen()?

Q.238Medium

What is the output of: char str[20]; scanf("%s", str); when input is 'Hello World'?

Q.239Medium

What is the correct syntax to pass a 2D array to a function?

Q.240Medium

For char arr[5] = {'a', 'b', 'c', 'd', 'e'}, is this a valid string?