COMPUTER MAINTENANCE AND SUPPORT November 2018

192/201 COMPUTER MAINTENANCE AND SUPPORT November 2018 Craft Certificate in Information Technology MODULE II COMPUTER MAINTENANCE AND SUPPORT Time: 3 Hours

INSTRUCTIONS TO CANDIDATES This paper consists of TWO sections: A and B. Answer ALL the questions in section A and any FOUR questions in section B in the answer booklet. Candidates should answer the questions in English.

This paper consists of 4 printed pages. Candidates should check the question paper to ascertain that all the pages are printed as indicated and that no questions are missing. ©2018 The Kenya National Examinations Council Turn over

SECTION A (40 marks) Answer ALL the questions in this section.

1. Explain three factors that should be considered when disposing electronic waste.
ANSWER:

  • Environmental impact: The disposal should minimize environmental damage.
  • Data Security: Sensitive data should be wiped or destroyed.
  • Recycling: Consider if the device can be recycled or parts reused.

2. Explain two classifications of computers based on functionality.
ANSWER:

  • General-purpose computers: Designed to perform a range of tasks.
  • Special-purpose computers: Designed for a specific task or application.

3. Outline four examples of output voltages in a computer’s power supply unit.
ANSWER:

  • +12V
  • -12V
  • +5V
  • +3.3V

4. Computer-based training is common phenomena in many organizations. Explain its benefits that could be realized when using this training method.
ANSWER:

  • Cost-effective: Reduces training costs.
  • Flexibility: Learners can study at their own pace and schedule.
  • Standardized: Ensures consistent delivery of content.
  • Interactive: Can engage learners with quizzes and simulations.

5. Differentiate between wired and non-wired computer memory.
ANSWER:

  • Wired memory is directly connected through hardware circuits, while non-wired memory relies on software-driven processes for data storage and retrieval.

6. Lawrence was given a printer for domestic use. Explain two challenges he is likely to face with the printer.
ANSWER:

  • High cost of ink/toner.
  • Slow printing speed compared to commercial printers.

7. Explain two circumstances under which a computer user would use a virtual keyboard.
ANSWER:

  • When a physical keyboard is unavailable or malfunctioning.
  • For security reasons to avoid keyloggers.

8. Distinguish between a track and track sector in storage media in computers.
ANSWER:

  • A track is a circular path on the surface of a disk where data is stored, while a track sector is a subdivision of a track into smaller segments.

9. Describe each of the following types of computer buses:
(a) Internal
(b) External
ANSWER:

  • Internal bus: Connects components inside the computer, such as the CPU and memory.
  • External bus: Connects the computer to external peripherals.

10. Explain each of the following terms as used in computer monitors:
(a) Resolution
(b) Backlight
ANSWER:

  • Resolution: Refers to the number of pixels on a screen, determining the clarity of the image.
  • Backlight: The light source behind an LCD screen that illuminates the display.

SECTION B (60 marks) Answer any FOUR questions in this section.

11.
(a) An IT support technician in your organization, outline three benefits of the service.
ANSWER:

  • Increases system efficiency by resolving technical issues.
  • Enhances productivity through minimal downtime.
  • Provides proactive maintenance and support to prevent future problems.

(b) Explain two electrical shocks that could be used to prevent the service.
ANSWER:

  • Grounding of electrical equipment.
  • Use of surge protectors and UPS devices.

(c) Jane experienced an electric component failure when diagnosing and repairing organization’s computers.
(i) Suggest two possible problems of the component.
(ii) Explain two strategies she could use to solve the problem.
ANSWER:

  • Possible problems: Short circuit, overheating.
  • Strategies: Replace faulty components, check power connections.

12.
(a) When servicing a computer, name any four parts that should be on the motherboard.
ANSWER:

  • CPU socket
  • RAM slots
  • Expansion slots
  • Power connectors

(b) List three examples of expansion slots that could be found in the motherboard.
ANSWER:

  • PCI
  • AGP
  • PCI Express

(c) List three factors that should be considered when selecting a motherboard.
ANSWER:

  • Compatibility with CPU and memory.
  • Number of expansion slots.
  • Power requirements.

(d) Jane was invited to perform an audit after troubleshooting a software problem with her computer. Explain two reasons that could have necessitated her final decision.
ANSWER:

  • To ensure the software is functioning correctly.
  • To check for any errors or missing files.

13. Mark was diagnosing a computer that was not powering on. Outline three possible causes of the problem.
ANSWER:

  • Faulty power supply unit.
  • Loose connections or disconnected cables.
  • Failed motherboard or CPU.

(b) When servicing the printer, list two categories of the printer memory in computers.
ANSWER:

  • RAM (volatile memory)
  • ROM (non-volatile memory)

(c) Explain three conditions that could indicate the signs of faulty memory.
ANSWER:

  • Frequent system crashes.
  • Slow performance.
  • Random shutdowns.

(d) Differentiate between indoor and outdoor printers in terms of resolution.
ANSWER:

  • Indoor printers typically have higher resolution for detailed prints, while outdoor printers prioritize durability and weather resistance.

14.
(a) List four examples of utility software used in a computer.
ANSWER:

  • Antivirus software.
  • Disk cleanup tools.
  • Backup software.
  • File compression utilities.

(b) Outline the factors that should be considered when selecting a motherboard.
ANSWER:

  • Processor support.
  • Number of expansion slots.
  • Type of memory supported.
  • Size/form factor