- Define the following terms. (5marks)
- Computer
- ICT
- Computer laboratory
- Data Interface cables
- Peripheral devices
- Differentiate between the following computer terms: (4marks)
- Central processing unit and system unit
- Data and information
- Describe four main physical parts of a computer. (4marks)
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- Name and explain three different ways classifying computers. (6marks)
- Name two categories of computers as classified in (a) above. (6marks)
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- What is the name of the machine developed by Charles Babbage? (1mark)
- State six characteristics of the first generation of computers. (6marks)
- With the aid of diagrams illustrate the difference between analog and digital data signal. (4marks)
- Give five advantages and five disadvantages of using computer today. (10marks)
- List and Explain five areas where ICT is applied in our society today. (5marks)
- Before setting up a computer lab Shujaa School was advised to make several considerations to ensure they put up a favorable lab.
- What are the four factors to be considered when preparing a computer lab? (4marks)
- What measures should Shujaa school put in place to ensure the security of:
- The computers in the lab. (5marks)
- The users of the lab. (5marks)
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- Differentiate between cold booting and warm booting. (4marks)
- Outline the procedure for
- Cold booting a computer (3marks)
- Shutting down a computer. (3marks)
- Explain five categories of keys found on a standard keyboard. (5marks)
- State four factors to consider before purchasing a computer hardware or computer accessories. (4marks)
- Give five resources that are managed and controlled by an operating system. (5marks)
- List three types of files found in a computer system. (3marks)
- List four factors to be considered when acquiring a printer. (4marks)
- Describe each of the following computer cable. (4marks)
- Parallel cable
- Serial cable
- Define the following terms: (4marks)
- Disk compression
- Disk formatting
MARKING SCHEME
- Define the following terms. (5marks)
- Computer- An electronic device that processes user input/data to desired output under the influence of programs.
- ICT-Information and Communication technology- The integration of telecommunication facilities and computers for the purpose of communication.
- Computer laboratory- a room set aside and prepared specifically for safe installation and use of computers.
- Data Interface cables – cables that connect peripheral devices to the system unit to allow transmission of data to and from the devices.
- Peripheral devices – devices connected to the system unit through ports.
- Differentiate between the following computer terms: (4marks)
- Central processing unit and system unit-CPU is the central part of a computer where data processing takes place while system unit is the part that houses the CPU and other internal components.
- Data and information-data is raw facts that do not have much meaning to the user while information is processed data that has more meaning to the user.
- Describe four main physical parts of a computer. (4marks)
- System unit- the part that houses the CPU and drives
- Monitor – the par that displays output and helps the user to monitor what is going on in a computer.
- Keyboard – it allows the user to enter data and instructions to the computer by pressing its keys.
- Mouse – a pointing device that allows a user to execute commands. It controls a pointer on the screen.
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- Name and explain three different ways classifying computers. (6marks)
- classification according to physical size and processing powe
- according to purpose
- according to functionality
- Name two categories of computers as classified in (a) above. (6marks)
- Physical size- supercomputers, mainframe, minicomputers and microcomputers
- Purpose- general and special purpose computers
- Functionality- hybrid, analogue and digital computers
- Name and explain three different ways classifying computers. (6marks)
-
- What is the name of the machine developed by Charles Babbage? (1mark)
- Analytical Engine
- State six characteristics of the first generation of computers. (6marks)
- Very large in size
- Used vacuum tubes
- Emitted allot of heat
- Broke down easily
- Consumed a lot of power
- With the aid of diagrams illustrate the difference between analog and digital data signal. (4marks)
Diagram of Analogue and digital signal
- What is the name of the machine developed by Charles Babbage? (1mark)
- Give five advantages and five disadvantages of using computer today. (10marks)
- Advantages
- Increased efficiency in performance and service delivery
- Job creation
- Improved communication
- Access to information
- Store a lot of data
- Can be used in hazardous
- Can be used to perform complex activities e.g. in hospitals ICUs
- Disadvantages
- Over reliance
- Job loss to illiterate users
- Decreased rate of production as workers waste time on social networks e.g. face book
- Loss of data or manipulation
- Health risks e.g. eye strains and poor posture due to over use of computers
- Advantages
- List and Explain five areas where ICT is applied in our society today. (5marks)
- Hospitals
- Storing patients records
- In life support machines
- Perform complex operations e.g. scanning
- In medical research
- Banks
- To record customers details and other records
- In ATM machines
- Document processing
- Supermarkets
- Stock control
- Security
- Processing sales receipts
- Law enforcement agencies
- Record keeping
- Using biometric analysis to identify persons
- Security enhancement using CCTV cameras
- Tracking down criminals using the information in their databanks
- Education
- CAL and CAI
- For learning purposes
- Record keeping
- Hospitals
- Before setting up a computer lab Shujaa School was advised to make several considerations to ensure they put up a favorable lab.
- What are the factors to be considered when preparing a computer lab? (4marks)
- Security
- Number of users
- Number of computers to be installed
- Stable power supply
- What measures should Shujaa school put in place to ensure the security of:
- The computers in the lab. (5marks)
- Burglar proofing the room
- Installing fire prevention and control equipment
- Providing stable power supply
- Dust and dump control
- Ensuring users do not eat or drink in the lab
- The users of the lab. (5marks)
- Insulating power cables
- Standard furniture
- Anti-glare screens
- Proper ventilation
- Avoid over-crowding in the room
- The computers in the lab. (5marks)
- What are the factors to be considered when preparing a computer lab? (4marks)
-
- Differentiate between cold booting and warm booting. (4marks)
- Cold booting – starting a computer that was originally off while warm booting is restarting a computer.
- Outline the procedure for
- Cold booting a computer (3marks)
- When booting a computer undergoes a POST to check if existing devices are working properly
- If they are OK it loads the OS
- After loading the OS the desktop is displayed
- Shutting down a computer. (3marks)
- Click start button
- Click turn off computer/ shutdown on the start menu
- From the dialog box displayed select shut down / turn off
- The computer will undergo shut down process.
- Cold booting a computer (3marks)
- Explain five categories of keys found on a standard keyboard. (5marks)
- Alphabetic keys
- Numeric keypad
- Cursor movement and editing keys
- Function keys
- Special PC keys
- Differentiate between cold booting and warm booting. (4marks)
- State four factors to consider before purchasing a computer hardware or computer accessories. (4marks)
- Processor type and speed
- Portability
- Warranty
- Storage capacity
- Display type
- Memory capacity
- Compatibility
- Color and design
- Interoperability
- Give five resources that are managed and controlled by an operating system. (5marks)
- Processor
- Memory
- Input/output devices and ports
- Secondary storage devices
- Communication devices
- List three types of files found in a computer system. (3marks)
- Application files
- System files
- Data files
- List four factors to be considered when acquiring a printer. (4marks)
- 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
- Describe each of the following computer cable. (4marks)
- Parallel cable- it is a communication cable which has high speed of transmission and transmits several bits at the same time.
- Serial cable- it is a communication cable which has a low speed of transmission and bits follow one another in sequence or are transmitted one at a time.
- Define the following terms: (4marks)
- Disk compression - Disk Compressing -is the process of reducing the space occupied by files and folders to enable create more disk space for data storage
- Disk formatting - Formatting a disk is the process of preparing a disk or other storage
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