Explanation

computer memory capacity is expressed in multiples of a power of two.

it is measured in megabytes (MB) and gigabytes (GB).

A medium-sized novel contains about 1 MB of information.

1 MB is 1,024 kilobytes, or 1,048,576 (1024x1024) bytes, not one million bytes.

Similarly, one 1 GB is 1,024 MB, or 1,073,741,824 (1024x1024x1024) bytes.

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

Laser technology is used in compact disc

Compact Disc is an example of Optical Storage

James T. Russell invented C.D. (Compact Disc).

 co-developed by Philips and Sony to store and play digital audio recordings.

history

 In August 1982, the first compact disc was manufactured.

It was then released in October 1982 in Japan and branded as Digital Audio Compact Disc.

It was released on March 2, 1983, in North America and Europe.

FIA CBT VU PAPER 22-12-2021

ND30-4-2023

Explanation

A terminal is required when more than one person uses a central computer at the same time.

The word "terminal" comes from early computer systems 

it is used to send commands to other computers and enter data 

it is an electronic or electromechanical hardware device

Explanation

The control unit (CU) is a component of a computer's central processing unit (CPU) that directs the operation of the processor.

It tells the:

computer's memory,

arithmetic/logic unit

and input and output devices

Explanation

Freeware is available free cost for use and distributed but is copyrighted by its developer

Example:

Google,

Chrome

Adobe PDF reader

while

Shareware is initially free and can distributed to others but paid for after a stipulated period.

Propriety software is the human-readable source code that is available for use, study, re-use, and modification

ND11-9-2023

Explanation

System software acts as a bridge between the hardware and application software.

Some examples of system software are Operating System, Compilers, Interpreter, Assemblers, etc

Explanation

A DVD is a type of optical media used for storing digital data.

It is the same size as a CD, but has a larger storage capacity.

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RY18012023

Explanation

A slide transition is the visual effect that occurs when you move from one slide to the next during a presentation.

You can control the speed, add sound, and customize the look of transition effects.

Explanation

WWW stands for World Wide Web.

Sir Tim Berners-Lee invented the World Wide Web in 1989.