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Edexcel GCSE Computer Science (1CP2) Exam Questions

Build a practice paper from 604 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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3 questions · 6 marks

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1Describe2 marksFile Management Swap Remove

Describe the purpose of file management in an operating system.

[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 the file can be found and opened later (1)
  • Allocates space on the disk for each file (1) so files are stored without overwriting each other (1)
  • Provides facilities to name file(s) and organise them into folder(s)/directories (1) so the user can find and manage their files (1)

Do not accept responses about process management, peripheral management or user management.

Do not accept bare statements of storing/saving, e.g. 'it stores files', 'it saves files' or 'it keeps files safe', with no development.

Do not award a mark for responses that repeat the question, e.g. 'it manages files', with no development.

Example answers and how they were marked
Full marks2/2

It keeps a record of where each file is stored on the disk (1) so the file can be found and opened later (1).

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

Some marks1/2

It organises files into folders.

Why: Creditworthy point (1) but no development of how this helps the user.

No marks0/2

It manages processes and peripherals so the computer runs smoothly.

Why: Describes other operating system functions, not file management; no creditworthy point.

2Explain2 marksThe Internet Swap Remove

Every device that connects to the internet is given an IP address.

Explain one reason why every device on the internet needs a unique IP address.

[2 marks]
Mark scheme

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

  • Data/packets are delivered to the correct device (1) because the IP address identifies that device on the internet (1)
  • A reply is sent back to the device that made a request (1) because the sender's IP address is used as the destination address for the reply (1)
  • Routers can forward packets to the right device (1) because each packet's destination IP address matches only one device (1)
  • A device can be contacted by other devices (1) because other devices use its IP address to send data to it (1)

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

Allow 'so the router knows where to send data' only when expanded to say the IP address identifies the destination device / is used by routers to forward the packet to that device.

Do not accept 'so it can connect to the internet' / 'so it can access the internet' without saying how the address is used to identify the device or deliver data to it.

Do not accept 'so the device can be identified' on its own without saying what the identification is used for, e.g. delivering data or returning a reply.

Do not award a mark for restating that an IP address is unique / every device has a different address.

Example answers and how they were marked
Full marks2/2

So that data reaches the correct device. The IP address is how the internet tells one device apart from another, so packets are sent to that device and not to a different one.

Why: Point (1): data reaches the correct device. Reason (1): the IP address identifies/tells devices apart, so packets are sent to that device.

Some marks1/2

So that packets go to the right device, because every device has a different address.

Why: Point (1): packets go to the right device. The reason only restates that every device has a different address, which the mark scheme says does not earn the second mark.

No marks0/2

So it can connect to the internet.

Why: No linked explanation of how the address is used; 'so it can connect to the internet' is not accepted without expansion.

3Calculate2 marksBinary Shifts Swap Remove

Binary, denary and hexadecimal patterns represent numbers.

Complete the table with the result of applying the shift to the binary pattern.

[2 marks]
Binary patternShift8-bit binary result
1010 1100Arithmetic shift right by 1
Mark scheme

Award one mark for each correct nibble in the correct order:

  • 1101 (1)
  • 0110 (1)

0 marks if the response is not 8-bit binary.

Example answers and how they were marked
Full marks2/2

1101 0110

Why: Every bit moves 1 place right, with copies of the sign bit (1) in from the left: both nibbles are correct (2).

Some marks1/2

0101 0110

Why: Fills the gap on the left with 0s, as a logical shift would, instead of copying the sign bit. The second nibble is correct (1); the first is not.

No marks0/2

0101 1000

Why: Shifts the bits the wrong way. Neither nibble is correct.

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