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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

An operating system manages the peripheral devices connected to a computer.

State two tasks carried out by the peripheral 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:

  • Receives input from/sends output to peripheral devices (1)
  • Communicates with/controls a peripheral using its device driver, including installing the driver for a new device (1)
  • Manages the print queue/buffer so that print jobs are sent to the printer in turn (1)
  • Reports the status of a device/a device error to the user, e.g. out of paper (1)

Allow answers that name a specific peripheral, as long as they also say what the operating system does with it, e.g. 'it controls the printer using its driver'.

Do not accept 'manages peripherals'/'controls the hardware' on its own, as this repeats the question.

Do not accept 'managing files' or 'managing users' (file management and user management are other functions of an operating system).

Example answers and how they were marked
Full marks2/2

It uses device drivers to control each peripheral and it reports a printer error such as out of paper to the user.

Why: Communicating with a peripheral using its device driver (1) and reporting a device error to the user (1) are two different peripheral management tasks.

Some marks1/2

It manages the print queue.

Why: Managing the print queue is one named peripheral management task (1); no second task is given.

No marks0/2

It manages peripherals and it manages users.

Why: 'Manages peripherals' repeats the question and earns nothing; 'manages users' is user management, not peripheral 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.

3Explain2 marksProcess Management Swap Remove

An operating system carries out process management.

Explain one reason why an operating system needs to manage processes.

[2 marks]
Mark scheme

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

  • The CPU can only execute one process at a time (1) so the operating system must decide which process runs next (1)
  • Each process needs CPU time (1) so the operating system must share the CPU between processes (1)
  • One process could use the CPU for too long (1) so the operating system must give other processes a turn (1)
  • A process may be waiting for a resource or user input (1) so the operating system can run another process that is ready (1)
  • The user wants to run more than one program (1) so the operating system must manage which process uses the CPU and when (1)

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

Allow 'program' for 'process'.

Do not accept 'to manage processes' / 'so processes are managed' without a reason.

Do not accept answers about managing files, memory or peripherals.

Example answers and how they were marked
Full marks2/2

The CPU can only run one process at a time, so the operating system must decide which process gets the CPU and for how long.

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

Some marks1/2

The operating system decides which process runs next.

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

No marks0/2

So that files can be saved in the right place.

Why: This is file management, not process management, so no creditworthy point.

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