Computer Studies Questions and Answers - Form 2 End Term 2 Exams 2023

1.  
   1. What is a computer laboratory? [2mks]
   2. State four possible causes of fire outbreak in a computer laboratory. [4mks]
   3. What actions should be taken in case of a fire outbreak in the computer laboratory? [4mks]
2. List four differences between a micro computer and a supercomputer. [4mks]
   
   

   Microcomputer	Super computer

3. State four benefits of using a computer in a school library. [4mks]
4. Describe each of the following types of computers. [4mks]
   
   1. Hybrid
   2. Embedded
5.  
   1. List four types of keys found on a computer keyboard. Give an example of each. [4mks]
   2.  
      1. Explain the term toggle keys as used in a computer keyboard. [2mks]
      2. List four examples of toggle keys on a computer keyboard. [2mks]
6. State three functions of Un-interrupted power supply. [3mks]
7. A computer laboratory experiences power supply problems. Describe three power related problems that should be addressed. [6mks]
8. Explain two types of storage devices used in a computer giving an example of each. [4mks]
9. List four differences between a laser printer and a dot matrix printer. [4mks]
10. Students enjoy noisy computer games.
    1. Which two hardware devices are needed to produce sound and one input device for playing games? [3mks]
    2. Apart from mouse, name four input devices connected to a computer. [4mks]
    3. List four factors to be considered when acquiring a printer. [4mks]
11. Write each of the following acronyms in full as used in computing. [4mks]
    1. CAD
    2. DVD
    3. WORM
    4. POS
12. State one function for each of the following elements of a computer system. [6mks]
    1. Hardware
    2. Software
    3. Liveware
13. List the four categories of system software. [4mks]
14. State five file details that are assigned a file by the operating system which can assist in tracing the file. [5mks]
15. Explain three features of a graphical user interface as used in computers. [6mks]
16. State four advantages of word processors over manual typewriter. [4mks]
17. List three editing features of word processing. [3mks]
18. A student typed a letter in a word processor and the last line of the letter flowed to the second page.
    State four ways in which the student could have adjusted the letter to fit on one page without changing the paper size. [4mks]
19. State the function of the following key combination. [6mks]
    1. CTRL+ O
    2. CTRL + E
    3. CTRL + C
    4. CTRL + N
    5. CTRL + A
    6. CTRL + B

MARKING SCHEME

1.  
   1. What is a computer laboratory? [2mks]
      A room specifically designed for installation of computers and provide a conducive environment for learning computer studies.
   2. State four possible causes of fire outbreak in a computer laboratory. [4mks]
      • Electrical faults;
      • Natural causes e.g. lightening
      • External attacks e.g. arsonists/terrorists
      • Inflammable materials
      • Accidents
   3. What actions should be taken in case of a fire outbreak in the computer laboratory? [4mks]
      • Switch off main electrical supply
      • Vacate the room
      • Inform master in charge
      • Call for help
      • Try to extinguish using the appropriate gaseous type fire extinguisher (not water)
2. List four differences between a micro computer and a supercomputer. [4mks]
   
   

   Microcomputers	Super computers
   Smalli in size	Big in size
   Low processing power	Very high processing power
   Low storage area	Very large storage location
   Cheap	Very expensive
   Consume less power	Consume less power

    
3. State four benefits of using a computer in a school library.   [4mks]
   
   • Record keeping made easier e.g. easy to track borrowers and books
   • Easy to search for library materials
   • Books and other materials can be held electronically hence allowing multimedia usage.
   • Library materials can be electronically marked thus minimizing loses and theft
4. Describe each of the following types of computers. [4mks]
   1. Hybrid - Is one that has both analog and digital features
   2. Embedded - One that is within some other device such as domestic appliances, petrol pumps etc. a computer attached to another machine.
5.  
   1. List four types of keys found on a computer keyboard. Give an example of each.  [4mks]
      • Alphanumeric
      • Function keysNumeric keypad
      • Special keys
        
      • Cursor control keys
   2.  
      1. Explain the term toggle keys as used in a computer keyboard.       [2mks]
         
         • These are keys that alternate the input mode. When pressed ON they are intended to perform a task, when OFF, they perform different task.
      2. List four examples of toggle keys on a computer keyboard.      [2mks]
         • Caps Lock, Insert, Pause, Num Lock, Scroll Lock
6. State three functions of Un-interrupted power supply. [3mks]
   • Protect devices against high and too low voltage
   • Provides temporary power supply in case of sudden power outage
   • Stabilizing the frequency/protection
   • Surge protection
   • Suppresses
   • Allow for protection, backup, alert
7. A computer laboratory experiences power supply problems. Describe three power related problems that should be addressed. [6mks]
   • Blackout – this is unexpected disconnection of power supply of power supply in the laboratory.
   • Power sag: sudden drop of voltage levels that lasts less than a second.
   • Transients/surge: high voltage flowing
   • Brownout: partial blackout where there’s low voltage flow
   • Short circuit: livewires touching each others
   • Loose connection, which may cause tripping or total power failure.
8. Explain two types of storage devices used in a computer giving an example of each. [4mks]
   • Primary storage devices –e.g. RAM, ROM
   • Secondary storage devices – e.g. hard disk, magnetic tape, CD-ROM, DVD, Flash disk
9. List four differences between a laser printer and a dot matrix printer. [4mks]
   
   

   Laser printer	Dot matrix printer
   Expensive	Cheap
   Non-impact printer	Impact printe
   Very fast	Very low
   High quality print out	Low quality print out
   Multiple copies impossible	Multiple copies possible

10. Students enjoy noisy computer games.
    1. Which two hardware devices are needed to produce sound and one input device for playing games?   [3mks]
       • Sound card
       • Speaker
       • Joystick
    2.  Apart from mouse, name four input devices connected to a computer. 54 [4mks]
       • Keyackball
       • Touch pad
       • Keypad
       • Touch screen
       • Digital camera
       • OMR, OCR, OBR
    3. List four factors to be considered when acquiring a printer. [4mks]
       • Initial cost
       • Print quality
       • Running cost
       • Speed of the printer
       • Whether colored or black and white
       • Paper size
       • Nature of work
       • Volume of work
       • Technology involved e.g. printing from storage media
11. Write each of the following acronyms in full as used in computing. [4mks]
    1. CAD - Computer Aided Design
    2. DVD - Digital Video Disk/Versatile disk
    3. WORM - Write Once Read Many
    4. POS - Point of Sale/Point of sale terminal
12. State one function for each of the following elements of a computer system. [6mks]
    1. Hardware
       • To perform tasks of inputting, storage, outputting, processing during data processing and communication.
    2. Software
       • Instruct the hardware/computer on what to do during data processing
       • Provides interface between hardware and liveware
       • Accept functions of software based category i.e. system/application/working/uses
    3. Liveware
       • Meant to design or operate a computer
13. List the four categories of system software. [4mks]
    • Firmware
    • Networking software
    • Operating system
    • Utilities
14. State five file details that are assigned a file by the operating system which can assist in tracing the file.    [5mks]
    • File types
    • File extension
    • File size
    • Creating time/date of storage/saves time
    • Owner/Account used
    • Time of modification
    • Usage conditions/file attributes (Read only/Archives/Hidden)
    • Protection information
    • Contents of the file- access time
15. Explain three features of a graphical user interface as used in computers.     [6mks]
    • Windows – a rectangular area on the screen where various applications run.
    • Icons – a picture or symbol which used to represent a software application or hardware device.
    • Menus – a list of options from which the user can choose from
    • Pointer- a symbol such an arrow which moves around the screen as the user moves the mouse.
16. State four advantages of word processors over manual typewriter.   [4mks]
    • Editing and formatting is easy
    • Has punctuation and style checking capability
    • Allows one to custom document printing needed
    • Has built in dictionary for spell checking
    • Offer alternative words (thesaurus)
17. List three editing features of word processing. [3mks]
    • Moving and copying
    • Cursor movement
    • Find and replace
    • Inserting and overtyping
    • Deleting text
18. A student typed a letter in a word processor and the last line of the letter flowed to the second page. State four ways in which the student could have adjusted the letter to fit on one page without changing the paper size.   [4mks]
    • Changing the paper orientation
    • Changing the font
    • Changing the font size
    • Reduce margin size
    • Reduce character spacing
    • Reduce line height
      
    • Change font style e.g. bold/italic
19. State the function of the following key combination.    [6mks]
    1. CTRL+ O
       • Open an existing document
    2. CTRL + E
       • Center the selected text
    3. CTRL + C
       • Used to copy a selected text
    4. CTRL + N
       • Open a new document
    5. CTRL + A
       • Highlight the entire document
    6. CTRL + B
       • used to bold selected text