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Edexcel GCSE Computer Science (1CP2) Exam Questions

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4 questions · 8 marks

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1Short recall2 marksPurpose & Function of Operating Systems Swap Remove

A computer can run more than one process at a time.

Give two tasks carried out by the process management function of an operating system.

[2 marks]
Mark scheme

Award one mark for any of the following up to a maximum of two marks:

  • Deciding which process runs next on the CPU/scheduling processes (1)
  • Allocating processor/CPU time to processes/allowing multitasking (1)
  • Managing the process life-cycle/process states (ready, running, blocked) (1)
  • Handling interrupts so a running process is suspended and another can run (1)
  • Stopping/terminating a process when it has finished (1)

Do not accept 'managing processes' on its own.

Do not accept 'handling interrupts' on its own.

Do not award two marks for the same task expressed twice, e.g. 'deciding which process runs next' and 'scheduling processes', or 'allocating CPU time' and 'giving each process a share of processor time'.

Do not accept 'managing memory/memory management', 'managing files/file management' or 'managing devices/peripherals' (these are other functions of an operating system).

Example answers and how they were marked
Full marks2/2

Deciding which process runs next on the CPU and stopping a process when it has finished.

Why: Scheduling a process (1) and terminating a process (1) are two different named tasks.

Some marks1/2

Deciding which process runs next and scheduling processes.

Why: Both points are the same task expressed twice, so only one mark is awarded under the guidance.

No marks0/2

Managing processes and managing files.

Why: 'Managing processes' repeats the question and earns nothing; 'managing files' is file management, not process management, so it is not credited.

2Short recall2 marksUser Management Swap Remove

A computer can be shared by more than one user.

Define the term user management.

[2 marks]
Mark scheme

Award one mark for any of the following up to a maximum of two marks:

  • Manages user accounts/profiles/logins (1)
  • Authenticates users when they log in (through passwords/biometrics) (1)
  • Controls what each user is allowed to access (access rights/permissions) (1)
  • Sets which files/folders/resources a user can use (1)
  • Gives different levels of access to different users (e.g. administrator/standard user) (1)

Allow 'decides which users can use the computer' for the manage user accounts/logins mark.

Allow references to access to files/folders/resources for the access rights mark, as this is part of user management, not file management.

Do not accept 'manages users' on its own.

Do not accept 'controls user access' on its own, as it is unclear whether this means logging in or access rights.

Do not accept 'manages files' or 'manages peripherals' (these are other operating system functions).

Example answers and how they were marked
Full marks2/2

The operating system manages user accounts and logins, and sets access rights so each user can only use certain files and resources.

Why: Manages user accounts/logins (1) and controls what each user is allowed to access through access rights (1).

Some marks1/2

It manages the users who can log in to the computer.

Why: Manages user logins (1); no creditworthy point about access rights/permissions.

No marks0/2

It manages the files and peripherals for different users.

Why: File management and peripheral management are other operating system functions, so neither mark is earned.

3Describe2 marksUser Management Swap Remove

A computer can be used by more than one person.

Describe how an operating system uses access rights to protect each user's files.

[2 marks]
Mark scheme

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

  • Each user/file is given permissions/access rights (1) so other users cannot read/write/open/change that user's files (1)
  • A user may be given read-only/read access to a file (1) so they cannot edit/delete/change it (1)
  • Each file is given permissions/access rights for different users (1) so the operating system allows/refuses access depending on which user is logged in (1)
  • The operating system checks a user's permissions/access rights when a file is opened (1) so a user with read-only/read access cannot save/delete changes (1)

Do not accept responses about asking for a password/username, as this checks who the user is, not what they are allowed to do.

Do not accept 'files are protected/safe' or 'access rights protect files' without saying how access is limited (e.g. read-only access, permissions for different users).

Example answers and how they were marked
Full marks2/2

A user can be given read-only access to a file, so they can open it but cannot edit or delete it.

Why: Read-only/read access point (1) and linked development that the user cannot edit/delete the file (1).

Some marks1/2

A user can be given read-only access to a file.

Why: Read-only/read access point (1); no development saying what this prevents, such as being unable to edit/delete the file (0).

No marks0/2

The operating system asks for the password again before the file opens.

Why: Describes asking for a password, which checks who the user is, not access rights to the file; no creditworthy point.

4Explain2 marksSoftware Basics Swap Remove

An operating system manages the files stored on a computer.

Explain one purpose of file management in an operating system.

[2 marks]
Mark scheme

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

  • Files can be organised into folders/directories (1) so users can find/store files easily (1)
  • Files can be located/opened/saved (1) because the operating system keeps track of where each file is stored (1)
  • Access permissions can be set on files (1) so only allowed users can read/modify them (1)
  • Files can be copied/moved/deleted (1) because the operating system controls where data is written/removed on a storage device (1)
  • Free disk space can be monitored/managed (1) so storage does not run out / files are stored efficiently (1)

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

Do not accept 'manages files' or 'organises files' on its own as it repeats the question.

Allow 'makes it easier to find files' as the linked reason for organising files into folders.

Example answers and how they were marked
Full marks2/2

File management lets the operating system organise files into folders so that users can find the files they need more easily.

Why: Point (1) for organising files into folders and linked reason (1) for making files easier to find.

Some marks1/2

It organises files into folders.

Why: Point (1) for organising files into folders; no linked reason.

No marks0/2

It manages the files on the computer so the files are managed properly.

Why: Repeats the question; no purpose or linked reason credited.

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