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Edexcel GCSE Computer Science (1CP2) Exam Questions

Build a practice paper from 693 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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2 questions · 4 marks

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1Short recall2 marksThe Internet Swap Remove

The internet is used by billions of people.

Define the term internet.

[2 marks]
Mark scheme

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

  • A (global) collection/group of interconnected networks/a network of networks (1)
  • Allows devices/computers to communicate/share data (1)
  • A wide area network (WAN)/the largest WAN (1)

Do not accept the World Wide Web/a search engine

Example answers and how they were marked
Full marks2/2

A global collection of interconnected networks that allows devices to communicate.

Why: Collection of interconnected networks (1) and allows communication (1).

Some marks1/2

A network of networks.

Why: First point only (1); no point about allowing communication.

No marks0/2

The World Wide Web, used to access websites.

Why: Confuses the internet with the World Wide Web, which is not accepted (0).

2Describe2 marksFetch Decode Execute Cycle Swap Remove

The control unit is one component of the CPU.

Describe the role of the control unit in the fetch-decode-execute cycle.

[2 marks]
Mark scheme

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

  • Decodes instructions (1) to determine what action/operation is required (1)
  • Sends control signals (1) along the control bus to coordinate/control the actions of other components (1)
  • Controls the fetch stage (1) by causing the next instruction to be fetched from main memory/RAM (1)
  • Controls the execute stage (1) by telling the ALU/other components when to carry out the required operation (1)

Do not accept responses relating to how the control unit affects performance, such as increasing clock speed.

Do not accept responses that describe the role of the ALU, registers or clock instead of the control unit.

Do not accept responses about the ALU performing calculations unless the control unit controlling the ALU is also stated.

Example answers and how they were marked
Full marks2/2

The control unit decodes instructions to determine what action is required.

Why: Linked point (1) and development (1): decodes instructions and determines the required action.

Some marks1/2

The control unit controls the fetch stage of the cycle.

Why: Point only (1): controls the fetch stage, but no linked development.

No marks0/2

The control unit carries out arithmetic and logical operations on data.

Why: No creditworthy point: describes the role of the ALU, which the mark scheme rejects.

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