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Edexcel GCSE Computer Science (1CP2) Exam Questions

Build a practice paper from 631 exam-style questions, each with its mark scheme and example answers. Print it, or answer it on paper and then open the mark schemes. Or browse the questions by topic.

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2 questions · 4 marks

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1Describe2 marksPurpose & Function of Operating Systems Swap Remove

A laptop stores many files on its hard disk.

Describe one way the operating system manages the files on the laptop.

[2 marks]
Mark scheme

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

  • Keeps a record/index of where each file is stored on the disk (1) so that the file can be found and opened when it is needed (1)
  • Allocates each file to a folder/directory (1) so that files used for the same purpose are kept together (1)
  • Decides where on the disk each new file is written (1) so that it does not overwrite an existing file (1)
  • Allocates space on the disk for a file (1) so that the file has somewhere to be saved (1)

Allow 'files are organised into folders so that they are easy to find', with the folder point (1) and its purpose (1).

Do not accept responses that only state that the operating system 'organises' or 'controls' the files, with no way of doing it given.

Do not accept 'stores the files' or 'saves files to the disk' without a way of doing it.

Do not accept responses about backing files up, or about the amount of storage space left on the disk.

Example answers and how they were marked
Full marks2/2

The operating system keeps a record of where each file is stored on the disk (1) so that the file can be found and opened again later (1)

Why: Linked point (1) - keeps a record of where each file is stored - and development (1) - so the file can be found later.

Some marks1/2

The operating system puts the files into folders.

Why: Gives the point that each file is allocated to a folder (1) but no linked development about why files are grouped.

No marks0/2

The operating system backs up the files to the cloud so that they are not lost.

Why: Backing up is not file management on this specification, so no point or development is credited.

2Explain2 marksProcess Management Swap Remove

A computer has a single CPU.

Explain how the operating system allows a user to run several programs at the same time.

[2 marks]
Mark scheme

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

  • The operating system switches rapidly between processes (1) so each process runs for a short time slice before the next one starts (1)
  • Each process is given a small amount of CPU time (1) so the CPU moves on to another process when that time is up (1)
  • The operating system chooses which process to run next (1) so the CPU is shared between the programs (1)
  • Processes take turns to use the CPU (1) because the CPU is so fast the user does not notice the switching (1)
  • Only one process can run on the CPU at a time (1) so the operating system must swap processes in and out quickly (1)

For both marks, the expansion must follow/associate with the statement.

Allow 'time slice' / 'time quantum'.

Do not accept 'the computer has more than one CPU' / 'each program runs on its own CPU'.

Do not accept 'the CPU does two things at once' without saying processes take turns/are switched.

Example answers and how they were marked
Full marks2/2

The operating system switches rapidly between processes, giving each one a small time slice, so the CPU is shared and the programs appear to run together.

Why: Linked point (1) and reason (1).

Some marks1/2

Each process is given a small amount of CPU time.

Why: A correct point (1) but no linked reason.

No marks0/2

The computer has two CPUs so each program can run on its own processor.

Why: The scenario states a single CPU, so this misconception earns no credit.

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