COMPUTER | MCQs

Explanation

The CPU is the brain of a computer.

It contains all the circuitry needed to process input, store data, and output results.

The CPU is constantly following instructions from computer programs

That tells it which data to process and how to process it.

Explanation

USB, Serial, and Parallel are common computer ports:

• USB is widely used for modern devices like keyboards, printers, and flash drives.
• Serial ports were used for modems and mice but are now mostly replaced by USB.
• Parallel ports were used for printers but have also largely been replaced by USB.

Explanation

DRAM memories need a refresh.

Dynamic Random Access Memory (DRAM).

DRAM must be refreshed many times per second to store information, otherwise, it will lose what it is holding.

DRAM is the most common type of memory in use today.

ND18-4-2023

Explanation

ARPA stand for Advanced Research Projects Agency.

ARPANET was the basis of the Internet.

ARPANET Concept first published in 1967.

ARPANET was developed by the U.S.A.

Explanation

Explanation

A computer mainly consists of electronic circuits.

They include integrated circuits (chips) and other components that enable the processing and transmission of data.

Explanation

Explanation

Full duplex mode allows communication in both directions simultaneously.

In contrast, half duplex mode permits communication in both directions, but not at the same time

Simplex mode allows communication only in one direction.

Explanation

A joystick sometimes called a flight stick.

The joystick is an input device consisting of a stick that pivots on a base and reports its angle or direction to the device it is controlling.

ND18-4-2023

Explanation

• The actual working area of the Computer's Microsoft Excel is a worksheet.
• The title bar in MS Excel displays the name of the workbook.
• The main window in a computer spreadsheet is called a workbook.