Computer

Question 1

What is a Computer? Def 1

Answer 1

an electronic machine, device for performing calculations and controlling operations that can be expressed either in logical or numerical terms.

Question 2

What is a Computer? Def 2

Answer 2

an electronic device, operating under the control instructions stored in its own memory that can accept data (input), process the data according to specified rules, produce information (output), and store the information for future use.

Question 3

What is a Computer? Def 3

Answer 3

A programmed device with a group of instructions to perform specific tasks and generate results at a really high speed.

Question 4

Functionalities of a Computer

Answer 4

● Takes data as input.
● Stores the data / instruction in its
memory and use them when
required.
● Processes the data and converts it
into useful information.
● Generates the output.
● Controls all the above four steps.

Question 5

Functionalities of a Computer Diagram

Answer 5

Data - Processing - Information

Question 6

Applications of a Computer

Answer 6

● Millions of complex calculations can be done in a mere fraction of time
● Difficult decisions can be made with unerring accuracy for comparatively little cost

Question 7

What does the applications domain of a computer depend on totally?

Answer 7

● Millions of complex calculations can be done in a mere fraction of time
● Difficult decisions can be made with unerring accuracy for comparatively little cost

Question 8

Characteristics of a Computer

Answer 8

● Speed
● Accuracy
● Diligence
● Reliability
● Storage Capability
● Versatility
● Resource Sharing

Question 9

Speed

Answer 9

Computer process data at an extremely fast rate –
millions of instructions per second in few seconds

Question 10

Accuracy

Answer 10

level of accuracy depends on the instructions and the type of machine being used

Question 11

Diligence

Answer 11

Computer being a machine does not suffer form the
human traits of tiredness and lack of concentration

Question 12

Reliability

Answer 12

Computer being a machine does not suffer form the
human traits of tiredness and lack of concentration

Question 13

Storage Capability

Answer 13

main memory of the computer is relatively small and
it can hold only a certain amount of information, therefore, the data is stored on secondary storage devices such as magnetic tape or disks.

Question 14

Versatility

Answer 14

It can perform multiple tasks simultaneously with great
ease.

Question 15

Resource Sharing

Answer 15

made the sharing of costly resources like printer
possible. It can also share among group of computers, thus creating a large information and knowledge base.

Question 16

Advantages of a Computer

Answer 16

● Multitasking
● Speed
● Cost/Stores huge
● Accuracy
● Data Security
● Task Completer
● Communication
● Productivity
● Reduce workload
● Reliability
● Storage

Question 17

Multitasking

Answer 17

Main advantages

Question 18

Speed AC

Answer 18

helps human to finish their task in a few seconds.

Question 19

Cost/Stores Huge

Answer 19

A centralized database for storing information is a major advantage that will reduce costs.

Question 20

Accuracy (AC)

Answer 20

they will perform not only calculations but also with accuracy.

Question 21

Data Security

Answer 21

Protecting digital data

Question 22

Task Completer

Answer 22

Completes tasks that might be impossible for humans to complete.

Question 23

Communication

Answer 23

helps the user better understand and communicate with other devices.

Question 24

Productivity

Answer 24

The level of productivity gets automatically doubled as the computer can do the work very fast.

Question 25

Reduce workload

Answer 25

Information is often accessed by more than one person with the necessity for work to be duplicated.

Question 26

Reliability

Answer 26

Computers can perform the same sort of work repeatedly without throwing up errors.

Question 27

Storage

Answer 27

The pc has an in-built memory where it can store an outsized amount of knowledge.

Question 28

Disadvantages of a Computer

Answer 28

• Virus and Hacking Attacks
• Online Cyber Crime
• High Cost
• Distractions/Distruptions
• Increase waste and impacts the environment
• Health Problems

Question 29

Virus and Hacking Attacks

Answer 29

Virus - may be a worm
Hacking - unauthorized access over a computer for a few illicit purposes

Question 30

Online Cyber Crime

Answer 30

computers and networks may have been utilized in order to commit a crime

E.g Cyberstalking and fraud

Question 31

High Cost

Answer 31

Expensive

Question 32

Distractions/Disruptions

Answer 32

High entertainment value

Question 33

Increase waste and impacts the environment

Answer 33

With the speed at that computer and other electronics get replaced, all of the old devices that get thrown away have a big impact on the environment

Question 34

Health Problems

Answer 34

Prolonged use of computers can lead to various health Hazards.

Question 35

Data vs Information

Answer 35

Data is a collection of facts, while information puts those facts into context.

While data is raw and unorganized, information is organized.