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A1.3 Operating systems and control systemsA1.3.2

Functions of an operating system

Describe the functions of an operating system

SL + HL≈ 50 minCommand term: DescribePremium

In this lesson

  • How the OS maintains system integrity while running background operations
  • Memory management, file systems, device management and scheduling
  • Security, accounting, the GUI, virtualization and networking

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What's inside

  1. LearnPrograms, processes and background operations
  2. LabThe life of a process
  3. LearnThe functions of an operating system
  4. LearnMemory management in more detail
  5. CheckMatch each function to what it does
  6. CheckWhich function is at work?
  7. LearnSecurity, accounting and virtualization
  8. CheckQuick check
  9. ExamWorked exam answer
  10. ReviewMistakes examiners see
  11. Exam practiceExam-style questions

Ends with 5 exam-style questions worth 12 marks, with a self-marking markscheme.