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Edexcel GCSE Computer Science (1CP2) Exam Questions

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4 questions · 10 marks

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1Multiple choice1 markStored Program Computers Swap Remove

Identify the bus that carries addresses in one direction only, from the CPU to main memory.

[1 mark]
  • AAddress bus
  • BControl bus
  • CData bus
  • DSystem bus
Mark scheme
  • A Address bus (1)
  • The only correct answer is A. The correct answer is address bus. Do not accept 'address' on its own.
  • B is not correct because the control bus carries control signals in both directions between the CPU and other components
  • C is not correct because the data bus carries data in both directions between the CPU and main memory
  • D is not correct because the system bus is the collection of all three buses
Example answers and how they were marked
Full marks1/1

A Address bus

Why: Correct option: the address bus carries addresses in one direction only, from the CPU to main memory (1).

No marks0/1

C Data bus

Why: The data bus carries data in both directions, so it is not the bus that carries addresses in one direction only from the CPU to main memory; no creditworthy point.

No marks0/1

B Control bus

Why: The control bus carries control signals in both directions, not addresses in one direction only; this is the common control/address bus confusion, so no mark.

2Multiple choice1 markCharacter Sets Swap Remove

ASCII is a character set used for representing text.

Identify the number of bits used to encode each character in ASCII.

[1 mark]
  • A6
  • B7
  • C8
  • D16
Mark scheme
  • B 7 (1)
  • The only correct answer is B. The correct answer is 7 bits.
  • A is not correct because 6 bits give only 64 different characters
  • C is not correct because 8 bits are used by extended ASCII to give 256 characters
  • D is not correct because 16 bits give 65 536 different characters, which is far more than the 128 in ASCII
Example answers and how they were marked
Full marks1/1

B 7

Why: B is the only correct answer: each ASCII character is encoded using 7 bits (1).

No marks0/1

C 8

Why: Near miss scoring 0: 8 bits is extended ASCII, and the scheme's C line says extended ASCII, not ASCII, is not the answer.

No marks0/1

A 6

Why: Misconception scoring 0: 6 bits give only 64 different characters, so it cannot be ASCII.

3Short recall2 marksEmbedded Systems Swap Remove

An embedded system is a computer system built into another device to perform a specific function.

Give two examples of devices that contain an embedded system.

[2 marks]
Mark scheme

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

  • Microwave (oven) (1)
  • Washing machine (1)
  • Dishwasher (1)
  • Digital camera (1)
  • Satellite navigation/satnav system (1)
  • Traffic light(s) (1)
  • Central heating controller/thermostat (1)
  • Digital watch/fitness tracker (1)
  • Vending machine (1)
  • Car (as it contains embedded systems) (1)

Allow any other device that contains an embedded system.

Do not accept general purpose devices such as a laptop, desktop computer, tablet or smartphone (these can run many different programs).

Example answers and how they were marked
Full marks2/2

A microwave oven and a washing machine.

Why: Two creditworthy devices, a microwave oven (1) and a washing machine (1).

Some marks1/2

A dishwasher and a laptop computer.

Why: Dishwasher credited (1); laptop is a general purpose device, so not accepted.

No marks0/2

A desktop computer and a smartphone.

Why: Both are general purpose devices, so neither earns a mark.

4Discuss6 marksFile Management Swap Remove

A student keeps school work and photographs on a laptop. The laptop's storage is almost full. The student uses the operating system's file management.

Discuss the file management tasks the operating system provides that the student can use to manage these files.

Your answer should include:

  • saving files
  • deleting files
  • copying files
[6 marks]
Mark scheme

Indicative content

Saving files

  • When saving, the operating system lets the student choose the folder and the file name, so new work goes into the correct subject folder instead of the root.
  • The operating system warns the student before a file with the same name is overwritten, so an earlier version of an essay is not lost by accident.
  • The operating system writes the file into free space on the laptop and records where it is, so the student can open it again later.

Deleting files

  • The operating system lets the student delete files that are no longer needed, which frees space so new photographs can be saved.
  • Deleted files are usually moved to the recycle bin first, so a file removed by mistake can be restored.
  • Emptying the recycle bin removes the data permanently and releases the space for other files.

Copying files

  • The operating system lets the student copy files to a USB flash drive, so there is a second copy if the laptop is lost or damaged.
  • Copying leaves the original file in place, so the student can carry on working on the laptop's copy.
  • A whole folder can be copied in one action, including its subfolders, which is quicker than copying each file separately.

Levels

  • Level 0 (0 marks): No rewardable content.
  • Level 1 (1–2 marks): Basic, independent points are made, showing elements of understanding of key concepts/principles of computer science. (AO1) The discussion will contain basic information with little linkage between points made or application to the context. (AO2)
  • Level 2 (3–4 marks): Demonstrates adequate understanding of key concepts/principles of computer science. (AO1) The discussion shows some linkages and lines of reasoning with some structure and application to the context. (AO2)
  • Level 3 (5–6 marks): Demonstrates comprehensive understanding of key concepts/principles of computer science to support the discussion being presented. (AO1) The discussion is well developed, with sustained lines of reasoning that are coherent and logically structured, and which clearly apply to the context. (AO2)

Level 3 responses must cover saving, deleting and copying.

Do not accept answers about the processor or defragmentation as file management tasks.

Example answers and how they were marked
Full marks6/6

When the student saves a file, the operating system lets them pick the folder and name, and it warns before a file with the same name is overwritten, so an earlier essay is not lost. Because the laptop is nearly full, the student can delete photographs they no longer need; these go to the recycle bin at first, so a file removed by mistake can be restored, and emptying the bin releases the space for good. The student can also copy their school work to a USB flash drive, which leaves the original on the laptop and gives a backup if the laptop is damaged.

Why: Saving (choice of folder and name, overwrite warning), deleting (recycle bin, restoring, releasing space) and copying (backup on a USB drive, original kept) are all explained and tied to the student's full laptop.

Some marks3/6

The student can save files into folders so they know where they are. They can delete files they do not need to free up space. They can copy files onto a memory stick.

Why: Three tasks are named with a reason for deleting, but saving and copying are not developed and there is little linkage between the points, so Level 2.

No marks0/6

The operating system saves files automatically and deletes old files when the RAM is full. The processor copies the files to the hard disk.

Why: No creditworthy point: files are not saved automatically, RAM filling does not trigger file deletion, and copying is not done by the processor. Typical confusion between file management and memory or processor management.

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

Build a paper on this topic 56
Character Sets 18 questions Images 19 questions Sound 19 questions

2.3 Data storage and compression

Build a paper on this topic 24
Compression 18 questions Units & Conversion 6 questions

3.1 Hardware

Build a paper on this topic 77
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

Build a paper on this topic 124
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

Build a paper on this topic 37
Low and High Level Languages 19 questions Translators 18 questions

4.1 Networks

Build a paper on this topic 138
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

Build a paper on this topic 36
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

Build a paper on this topic 18
Data Protection Act 14 questions Impact of AI 4 questions

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