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Edexcel GCSE Computer Science (1CP2) Exam Questions

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3 questions · 6 marks

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1Short recall2 marksPurpose & Function of Operating Systems Swap Remove

A home computer can have more than one user account.

Name two tasks carried out by the user 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:

  • Creating/deleting user accounts (1)
  • Storing usernames and passwords (1)
  • Checking login details/authenticating a user at login (1)
  • Setting access rights/permissions for each user, e.g. restricting which files/folders/programs/drives they can access (1)

Allow logging in as an example of checking login details.

Do not accept managing users on its own.

Do not accept provides a user interface, as this is not user management.

Do not accept managing files or managing processes, as these are other functions.

Do not accept stopping hackers/protecting from malware, as this is security, not user management.

Example answers and how they were marked
Full marks2/2

It stores usernames and passwords and sets access rights for each user.

Why: Storing usernames and passwords (1) and setting access rights (1) are two different user management tasks.

Some marks1/2

It checks the password at login and manages users.

Why: Checking a password at login earns (1); managing users repeats the question and earns nothing.

No marks0/2

It manages users and stops hackers accessing the computer.

Why: Managing users repeats the question; stopping hackers is security, not user management.

2Short recall2 marksUser Management Swap Remove

A user must log in before using a computer.

State two methods, other than a password, that an operating system can use to authenticate a user.

[2 marks]
Mark scheme

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

  • Fingerprint scan (1)
  • Face recognition (1)
  • Iris/retina scan (1)
  • Voice recognition (1)
  • Palm print/vein scan (1)
  • Smart card (1)
  • Security token (1)
  • Authenticator app (1)

Allow one-time passcode (OTP) for authenticator app.

Do not accept password (given in the question).

Do not accept username/user ID (it identifies the user but does not authenticate them).

Do not accept 'two-factor authentication' on its own (it is a combination of methods, not a method itself).

Do not accept 'encryption'.

Example answers and how they were marked
Full marks2/2

Fingerprint scan and a smart card.

Why: Fingerprint scan (1) and smart card (1) are two accepted methods.

Some marks1/2

Fingerprint scan and a username.

Why: Fingerprint scan (1); username is not accepted because it does not authenticate the user.

No marks0/2

A username and two-factor authentication.

Why: Username is not accepted because it does not authenticate the user, and two-factor authentication alone is not accepted because it is a combination of methods.

3Describe2 marksProcess Management Swap Remove

A process ends when its program closes or finishes.

Describe how the operating system terminates a process.

[2 marks]
Mark scheme

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

  • Frees/releases the memory/RAM used by the process (1) so other processes can use it (1)
  • Removes the process from the ready queue/scheduler (1) so it is no longer selected to run on the CPU (1)
  • Releases other resources (files/peripherals) held by the process (1) so they can be used by other processes (1)
  • Removes/updates the process entry in the process table (1) to show the process is no longer running (1)

Allow 'process queue' / 'queue of processes' for ready queue/scheduler.

Allow 'program' for process.

Do not accept responses that only restate that the process/program has ended/closed.

Do not accept responses that only say the process stops running / the computer stops using the program, with no linked description.

Do not accept responses that say the program/file is deleted from storage or that the user closed/deleted the program.

Example answers and how they were marked
Full marks2/2

It frees the memory the process was using so other processes can use it.

Why: Frees memory (1) linked to other processes using it (1).

Some marks1/2

It removes the process from the queue.

Why: One creditworthy point about removing from the queue (1), but no linked development.

No marks0/2

It deletes the program from the hard drive.

Why: Terminating a process does not delete the program file; no creditworthy point.

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