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Edexcel GCSE Computer Science (1CP2) Exam Questions

Build a practice paper from 659 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 · 5 marks

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1Multiple choice1 markAddressing Swap Remove

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

Identify the number of bits in an IPv4 address.

[1 mark]
  • A4
  • B8
  • C32
  • D128
Mark scheme
  • C 32 (1)
  • The only correct answer is C. The correct answer is 32.
  • A is not correct because 4 is the number of groups of numbers in an IPv4 address
  • B is not correct because 8 is the number of bits in each group of an IPv4 address
  • D is not correct because 128 is the number of bits in an IPv6 address
Example answers and how they were marked
Full marks1/1

C 32

Why: Correct option (1): an IPv4 address is 32 bits long.

No marks0/1

B 8

Why: 8 is the number of bits in one group of an IPv4 address, not the whole address (mark scheme line B), so no mark.

No marks0/1

D 128

Why: 128 is the length of an IPv6 address, not an IPv4 address (mark scheme line D), so no mark.

2Describe2 marksWireless Connections Swap Remove

A family uses a wireless network at home.

Describe how interference can affect the performance of a wireless network.

[2 marks]
Mark scheme

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

  • Other electrical/radio devices nearby (1) interfere with the wireless signal so data is corrupted (1)
  • Interference corrupts data (1) so the data has to be resent, which increases latency/slows the transfer (1)
  • Interference reduces the strength of the signal received (1) which lowers the data transfer rate the connection can support (1)
  • Interference makes the connection drop (1) so data transfer stops/devices have to reconnect (1)

Do not accept responses that only name a device (microwave, phone) without saying how it affects the network.

Do not accept responses that only state the network becomes slower without saying what causes the interference or how it affects the data.

Do not accept responses about wired connections or cables.

Example answers and how they were marked
Full marks2/2

Other electrical devices nearby can interfere with the wireless signal and corrupt data, so the data has to be resent and transfers are slower.

Why: Linked point: other electrical devices interfere and corrupt data (1), developed by the data being resent, which slows the transfer (1).

Some marks1/2

Other electrical devices nearby can interfere with the wireless signal.

Why: Cause given: other electrical devices interfere with the signal (1), but no development of how this affects the data or performance.

No marks0/2

Interference happens when the wireless cable is damaged by other cables.

Why: Misconception about cables; the mark scheme does not accept responses about wired connections or cables.

3Explain2 marksPacket Switching Swap Remove

A router connects a home network to the internet.

Explain how a router uses the destination IP address in a packet header.

[2 marks]
Mark scheme

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

  • The router reads the destination IP address (1) so it knows which network/device the packet is for (1)
  • The router looks up the destination IP address in its routing table (1) to find the next router/route for the packet (1)
  • The router forwards the packet to the next router (1) that leads towards that IP address / is on the best route (1)

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

Do not accept MAC address - routers use the IP address to route packets between networks.

Do not accept 'it finds the exact device' without saying how the router uses the address, e.g. routing table/next router.

Example answers and how they were marked
Full marks2/2

The router looks up the destination IP address in its routing table to find the next router to send the packet to.

Why: Linked point (1) and reason (1): looks up the destination IP address in the routing table to find the next router.

Some marks1/2

It reads the destination IP address.

Why: Reads the destination IP address (1) but gives no linked reason about a routing table or next router.

No marks0/2

It reads the MAC address so it knows which computer sent the packet.

Why: Routers use the IP address to route packets, not the MAC address; no creditworthy point.

Questions by topic

2.1 Binary

Build a paper on this topic 58
Adding Binary Numbers 6 questions Binary and Hexadecimal Basics 10 questions Binary Shifts 6 questions Binary to Denary Conversion 6 questions Binary to Hexadecimal Conversion 6 questions Denary to Binary Conversion 6 questions Denary to Hexadecimal Conversion 6 questions Denary to Negative Binary Conversion 6 questions Hexadecimal to Binary Conversion 6 questions

2.2 Data representation

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Character Sets 18 questions Images 19 questions Sound 19 questions

2.3 Data storage and compression

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Compression 18 questions Units & Conversion 6 questions

3.1 Hardware

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Embedded Systems 17 questions Fetch Decode Execute Cycle 15 questions Primary Memory 15 questions Secondary Memory 15 questions Stored Program Computers 15 questions

3.2 Software

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File Management 18 questions Memory Management 16 questions Peripheral Management 11 questions Process Management 12 questions Purpose & Function of Operating Systems 17 questions Software Basics 13 questions User Management 18 questions Utility Software 19 questions

3.3 Programming languages

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Low and High Level Languages 19 questions Translators 18 questions

4.1 Networks

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Addressing 16 questions LANs & WANs 16 questions Network Speed 5 questions Packet Switching 16 questions Protocols & Layers 17 questions The Internet 16 questions Topologies 17 questions Wired Connections 17 questions Wireless Connections 18 questions

4.2 Network security

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Network Security Risks 18 questions Preventing Network Security Risks 18 questions

5.1 Environmental

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E-waste 17 questions Manufacturing Technology 19 questions

5.2 Ethical and legal

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Data Protection Act 17 questions Impact of AI 18 questions Intellectual Property 18 questions Software Licences 12 questions

5.3 Cybersecurity

Malware 8 questions

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