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Edexcel GCSE Computer Science (1CP2) Exam Questions

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2 questions · 3 marks

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1Multiple choice1 markProcess Management Swap Remove

Identify the term for an operating system running more than one task at the same time.

[1 mark]
  • AMultitasking
  • BProcess management
  • CScheduler
  • DTime slice
Mark scheme
  • A Multitasking (1)
  • The only correct answer is A. The correct answer is multitasking. Allow 'multi-tasking'.
  • B is not correct because process management is the wider operating system function that controls processes, not the term for running more than one task at the same time
  • C is not correct because a scheduler decides which process will run next on the CPU
  • D is not correct because a time slice is a fixed period of CPU time allocated to a process by the scheduler
Example answers and how they were marked
Full marks1/1

A Multitasking

Why: Correct option (1): multitasking is an operating system running more than one task at the same time.

No marks0/1

B Process management

Why: Near-miss scoring 0: process management is the wider operating system function that controls processes, not the term for running tasks at the same time.

No marks0/1

C Scheduler

Why: Misconception: the candidate has picked a part of process management; the scheduler only decides which process runs next, so no mark is awarded.

2Describe2 marksPrimary Memory Swap Remove

Computers use main memory (RAM).

Describe the role of main memory (RAM) in the von Neumann stored program concept.

[2 marks]
Mark scheme

Award up to two marks for a linked description such as:

  • Holds/stores the data and instructions of the program currently being run (1) to be fetched by the CPU during the fetch-decode-execute cycle (1)
  • Instructions and data are loaded/copied from secondary storage into RAM (1) before they can be processed by the CPU (1)
  • Stores the program that is currently running (1) together with the data that it uses (1)
  • Holds the data and instructions that the CPU needs next (1) so the CPU can access them quickly (1)

Allow a response that describes both that RAM holds the current program and that the program was loaded from secondary storage into RAM, provided each statement is linked to a development.

Do not accept responses about cache or registers as the store of the current program.

Do not accept responses that say RAM stores data permanently or that RAM is read-only.

Do not accept 'RAM is where the CPU processes data' (this describes the ALU/registers), or 'RAM stores the operating system' unless it is linked to the program currently being run.

Do not award a second mark for a response that only states that RAM holds data and instructions with no linked development.

Example answers and how they were marked
Full marks2/2

RAM holds the data and instructions of the program that is currently running so that the CPU can fetch them during the fetch-decode-execute cycle.

Why: Linked point (1): holds data and instructions of the current program, plus linked development (1): fetched by the CPU in the cycle.

Some marks1/2

RAM holds the data and instructions that the computer is using at the moment.

Why: States the role (1) but gives no linked development, so only the first mark is awarded.

No marks0/2

RAM is the secondary storage, so the program is kept there when the power is switched off.

Why: Confuses main memory with secondary storage and says contents are kept without power; both near-misses are named in the 'Do not accept' lines, so no mark.

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