Input | MCQs

Explanation

Explanation

cin >> age; is the correct syntax in C++ to take input from the user and store it in the variable age.

The >> operator is used with cin to extract the input value into the variable.

Explanation

The getche() function in C/C++ (from the <conio.h> library) performs two actions:

1. Reads a single character from the keyboard (immediately, without waiting for Enter).
2. Echoes (displays) the character on the screen.

Explanation

"R+" mode opens an existing file for both reading and writing.

The file must already exist; it does not create a new file if one doesn’t exist.

Explanation

A joystick is a device that captures user input.

It typically to control movement or actions in a game or simulation.

Explanation

In C, getchar() reads a single character from standard input but requires pressing "Enter" to submit the input.

The input is buffered, meaning it waits for the newline (n) before processing the character.

Explanation

A mechanical mouse uses a rubber ball to detect movement as it rolls on a surface.

The movement of the ball turns internal rollers that track the cursor’s direction and speed.

Explanation

A mouse helps users select items and point to objects on the computer screen.

It is a primary input device for graphical user interfaces.

Explanation

getche() reads a single character from the keyboard and displays (echoes) it immediately on the screen.

It's part of conio.h in C programming, often used for interactive input.

Explanation

The touch screen is an Input device and an Output device. 

Not only is it capable of accepting input, but it also displays the output from the computer.