A touch screen can be used as both input as well as output device.

AI researchers have developed several specialised languages for AI research including Lisp and Prolog.

A compiler is a system level program that translates a program written in a high level language to a machine language.

A flash drive can be used as both primary as well as secondary memory.

The number of locations is calculated as 2^{(number of bits of addresses generated by the machine)}. So, 64K = 2¹⁶. Hence, this is the number of locations addressed by a16 bit machine.

Loading of the operating system into the main memory takes place as a part of the booting process.

MICR or the Magnetic Ink Character Reader is used in the cheque clearing process in banks.

The function sprintf() operates on strings.

The mechanism to associate code with its data is called encapsulation.

In digital imaging, a pixel or pel (picture element) is a physical point in a raster image, or the smallest addressable element in a display device. So, it is the smallest controllable element of a picture represented on the screen.

2's complement of a number is obtained by adding 1 to the 1's complement of that number.

The static storage class instructs the compiler to keep a local variable in existence during the lifetime of the program instead of creating and destroying it each time it comes into and goes out of scope. Therefore, making local variables static allows them to maintain their values between function calls.

It returns the address of a variable. For example, a; will give actual address of the variable.

Comments are program documentations, which help the reader to understand the code better.

FIFO stands for First In First Out. A queue is a FIFO data structure.