Computer Studies Questions and Answers – Revision for Newbies

1. Explain three (3) input devices

i) Keyboard: The keyboard is the most common input device in computer science. It’s used to type text and other items on a computer screen.

ii) Mouse: A mouse is a pointing device consisting of two small objects connected by a cord or cable that allows you to move your cursor around on the screen by simply pointing at it with one hand while holding down another button (usually left). This can be helpful when you want to click something but don’t have any fingers free, like when trying out new websites before committing them into memory permanently.

iii) Touchscreen: A touchscreen is another form of input device that allows users to interact with programs via touch instead of physical buttons or voice commands like keyboards/mice do. This works especially well on mobile devices such as smartphones where there aren’t many buttons available on their screens.

2. Name the device that controls all other components in a computer

The motherboard is the main component of a computer, and it’s also the most important part. It contains all of the other components that are needed to run your computer.

In addition to being its own unit, this central processing unit (CPU) is what controls everything else in a computer: It does everything from turning on and off lights to bringing together all other components so you can use them for an application or program.

Also Read: IT Questions And Answers That Will Make You An Expert

3. Explain two (2) functions of system software

System software is the set of programs that controls a computer system. It includes the operating system, device drivers and other programs that allow you to use your computer.

System software is different from application software because it’s responsible for keeping everything running smoothly while applications are doing their thing. For example, if you were to open an image file in Photoshop and try to save it as an image file outside of Photoshop (a process known as “save as”), then you would be using application software rather than system software because there’s no need for any kind of special behavior when saving files outside of their original program.

4. Describe the term algorithm

It is a sequence of steps to solve a problem. It is the solution to a problem.

It can be used in many areas, including computer programming and mathematics.

5. List three (3) advantages of an E-mail account

i. E-mail accounts are free.
ii. E-mail accounts are easy to set up.
iii. E-mail accounts are convenient and allow you to communicate with others all over the world, whether they are in your class or not.

6. What is the correct way to remove a CD/DVD from a CD/DVD drive?

You can eject a CD/DVD from your computer by using one of the following method:

The Eject command in Windows Explorer (right-click on an empty area and choose Properties).

7. State three (3) ways of protecting one’s computer files

i. Back up your files.
ii. Set a password for your files.
iii. Use a lock feature on your files.
iv. Use a software program to protect your files

8. Write one difference between hardware and software

i. Hardware is physical.
ii. Software is virtual

9. Outline three (3) tips for managing one’s email account more effectively

i. Use a folder structure.
ii. Archive emails.
iii. Set up a spam filter

10. State the meaning of the following terms:

Input devices: These are the sources of data that are used when you use a computer.

Control device: This is a component of a computer system that controls all other components in the system and directs their activities.

System software: The software that runs on your computer, helps you to use the hardware properly by giving instructions to it.

Application software: This refers to programs designed for specific tasks or uses; they often provide specialized tools or functions not available through general-purpose operating systems (OSs). For example, word processors like Microsoft Word are applications because they’re designed specifically for word processing.

11. What is meant by a network?

A network is a collection of computers, peripherals and other devices connected via a wired or wireless connection. The devices can be personal computers, servers, printers, routers, switches and many other types of devices.

12. What is LAN? 

LAN is a network of computers that are connected within a building or a small group of buildings. LANs can be wired or wireless. They allow you to share resources between devices and make them easier to use by using common protocols like TCP/IP or Ethernet.

13. State the advantages of LAN

i. It is a secure and reliable network.
ii. It can be used in an office, school, or home.
iii. It is faster than a WAN connection.
iv. Easy to use and manage the network devices with just one mouse click

14. Explain what is meant by transmission speed in data transfer

Transmission speed is the rate at which data is transmitted from one place to another. It is measured in bits per second (bps) or kilobits per second (kbps). The higher the transmission speed, the faster your computer can send or receive information.

15. Explain the meaning of bandwidth

Bandwidth is the rate at which data can be transmitted. The higher your internet connection speed, the faster you will be able to send and receive information over that network.

16. Explain the three types of network topologies and state their advantages and disadvantages

Star topology

It is a simple network design where each device connects to a single hub. All devices have an equal chance of being connected to any other device in the network, but they all need to be connected to a central point or “hub”.

Advantages 

i. Reliable
ii. High Availability
iii. High Performance
iv. Fast and Easy Installation

Disadvantages

i. Expensive to set up
ii. High maintenance costs
iii. Difficult to scale a system with a large number of nodes.

Bus topology

This is similar to the star in that it has only one route between nodes on the same segment like two computers, but instead of having hubs at each end, there are just switches between them.

Advantages

i. It is easy to add more devices to the bus without changing the electrical characteristics of the entire system.
ii. Communication between devices can be bi-directional and asynchronous, which makes the design more flexible.
iii. The cost of interconnecting buses is generally less than that of the interconnecting star or ring networks
iv. Reduced power consumption

Disadvantages

i. Not well suited for parallel communication.
ii. The overhead in adding multiple devices to a bus makes it difficult to use buses for high-speed networking or real-time systems.
iii. Bus topology is limited to processing data in one direction at a time, which is slower than parallel processing of data in both directions simultaneously.

17. Explain the meaning of a token ring network

A token passing protocol is a method by which several nodes can exchange information or tokens. In a token ring network, each node has its address and transmits data on a single shared wire. The transmission rate of the data can be increased by using multiple rings at the same time. The maximum number of nodes on one ring is limited only by hardware and software capabilities; there are no other restrictions on how many computers may be connected in this way.

18. State the advantage of token ring network

Token passing protocols allow all nodes to share information at higher speeds than would be possible with broadcast systems because they don’t require each computer to listen for incoming transmissions from every neighboring node before transmitting its message.

19. Give two examples where data transfer can be done through telephone line modems

You can use modems to transfer data over telephone lines. Modems are also used for internet access, fax machines and other things like email.

20. State two ways in which special effects can be achieved through editing in video productions

Special effects can be achieved through editing in video productions. For example, a director may want to show the audience that a character is walking across a stage by showing them walking on the stage and then cutting back and forth between two different views of the same person walking.

21. Mention four categories under which multimedia applications can be classified. Give examples for each category

Multimedia applications are classified under the:

i) Multimedia presentation: This group includes applications that allow you to create and present multimedia presentations. Examples of these include PowerPoint, Keynote, and Visio.

ii) Multimedia content creation: You can use this type of application to create video clips or audio recordings on your computer or mobile device (such as a smartphone). Examples include iMovie on Mac OS X, Lightworks, etc.

iii) Multimedia games or interactive entertainment devices like tablets and smartphones allow users’ to act in real-time while they play games.

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