Computer Knowledge - MCQ Practice Questions

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");?

What is the return type of the malloc() function?

Which function is used to release dynamically allocated memory in C?

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

Which of the following is used to comment multiple lines in C?

What will be the output of: float x = $\frac{5}{2}$; printf("%f", x);

How are structures different from unions in C?

What will be the output of the following code? int a = 5; int b = ++a + a++; printf("%d", b);

What will be the output of: int x = 5; printf("%d", x << 1);

Consider the code: int arr[10]; int *p = arr; What is p[5]?

What is the purpose of the void pointer in C?

Which function is used to read a string from standard input?

What is the output of: int arr[] = {1,2,3,4,5}; printf("%d", sizeof(arr)/sizeof(arr[0]));

What will be the output of: char c = 'A'; printf("%d", c);

What is the output of: int arr[5]; printf("%d", sizeof(arr));

Which function is used to allocate memory dynamically at runtime?

What is the purpose of the break statement in a switch case?