Computer Knowledge - MCQ Practice Questions

What is the difference between calloc() and malloc() in C?

What is the correct syntax to open a file in C?

Consider the following code: int arr[] = {1, 2, 3, 4, 5}; int *ptr = arr; What is the value of *(ptr + 2)?

What is the output of the following code? for(int i = 1; i <= 3; i++) { if(i == 2) continue; printf("%d ", i); }

What is the output of: int x = 10; printf("%d", x++); printf("%d", x);

Which of the following correctly declares a pointer to an integer?

What will be printed if char ch = 'A'; printf("%d", ch); is executed?

Which of the following is used to dynamically allocate memory in C?

What will be the output of: char str[] = "Hello"; printf("%c", str[1]);?

Which function is used to compare two strings in C?

What is the output of the following: int x = 5; int *p = &x; printf("%d", *p);?

What will be the output of: int x = 5; x += 3; printf("%d", x);?

Which loop in C does NOT check the condition before executing the loop body?

What will be the output of: int x = 5; int y = ++x; printf("%d %d", x, y);?

Which function is used to allocate memory dynamically in C?

What is the output of: int a = 10, b = 20; int temp = a; a = b; b = temp; printf("%d %d", a, b);?

In C, what does the scanf() function do?

What will be the output of: for(int i = 0; i < 3; i++) { printf("%d ", i); }?

Which of the following is the correct way to define a function that takes no parameters and returns no value?

What is the output of the following program: int x = 5; if(x > 3) printf("Greater"); else printf("Smaller");?