C++ Programming | MCQs

Explanation

In C programming, preprocessor directives (like #include or #define) begin with the # symbol.

These directives are processed before the actual compilation of code starts.

Explanation

The valid output statement in C language among the given options is printf("Hello");.

In C programming, the printf() function is the standard library function used to display formatted output on the console.

It is part of the stdio.h header file, which needs to be included in your C program using #include <stdio.h>.

Options A, B, and C (display(), output(), print()) are not standard C library functions for outputting text to the console.

Explanation

do-until is not a valid loop structure in C programming.

C provides for, while, and do-while loops for iteration.

Explanation

The format specifier %c is used in scanf to read a single character.

So, km must be a character variable, e.g., char km;.

Explanation

In C, 9 and 4 are integers, so 9 / 4 = 2 (integer division, fractional part is discarded).

Then, 2 * 2 = 4

Explanation

• In C, the For loop is commonly used to iterate through an array because it allows for easy initialization, condition checking, and incrementing/decrementing of the loop counter.
• The syntax of a For loop is designed to handle array indexing and iteration naturally.

Explanation

C program has at least one function; it is the main function (). Each function has a name.

Explanation

In C, the asterisk (*) symbol is used to dereference a pointer.

It means to access the value stored at the address held by the pointer. 

Therefore, *ptr is the correct syntax to access the value at the address ptr.