Summary

• Description:

  The PDF document comprises KALA Joint Trials Computer Studies Paper 1 2025 Mock Exam with Marking Scheme.

  It is a KCSE Computer Studies Paper 1 (Theory) (451/1) KALA Trial Examination (July/August 2025).

  • Duration: 2 Hrs 30 Min
  • Total Marks: 100
  • Number of Questions: 20 (Questions 1–20)
  • Marking Scheme: The marking scheme is in a different document.

  It covers the following topics:

  • Computer memory and data representation (cache, byte, ASCII vs BCD)
  • Peripheral devices and port-powered accessories
  • Video conferencing requirements
  • Display concepts (refresh rate and resolution)
  • Database reporting (formula for mean in a report footer)
  • Operating system security features
  • Hardcopy vs softcopy output (reasons for preferring hardcopy)
  • Word processing features (multi-level lists)
  • ICT applications in improving elections (secret ballot process)
  • Intranet security vs Internet file sharing
  • Computer networking careers and basics
  • Spreadsheets (difference between a formula and a function)
  • Data processing (batch processing and its disadvantages)
  • Algorithms and programming logic (flowcharts; While vs Repeat–Until loops)
  • Computer hardware and specifications (laptop advert interpretation: SSD, RAM, clock speed, screen size)
  • Application software selection (word processor, spreadsheet, DTP, database, etc.)
  • Binary and coding (coding schemes; signed binary denary values)
  • Email services and advantages to a school
  • File management and directory structure (hierarchical diagrams and file paths)
  • Virtual reality (components and areas of application)
  • Networking concepts (NIC, MAC address, IP addressing, bus topology components, packet switching)
  • Systems development (fact-finding methods)
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  COMPUTER STUDIES

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