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Exam Practice
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Cambridge IGCSE Computer Science (Paper 1) Smart practice A mixed round aimed at your weak spots
Unit 1
Data representation
Number systems
Binary, denary and hexadecimal conversions
0%
Uses of hexadecimal
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Binary addition and overflow
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Logical binary shifts
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Two's complement
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Text, sound and images
Character sets: ASCII and Unicode
0%
Representing sound
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Representing images
0%
Data storage and compression
Data storage units and file size calculations
0%
Data compression
0%
Unit 2
Data transmission
Types and methods of data transmission
Packets and packet switching
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Methods of data transmission
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The USB interface
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Methods of error detection
Parity, checksum and echo check
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Check digits and ARQ
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Encryption
Encryption
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Unit 3
Hardware
Computer architecture
The CPU, Von Neumann architecture and the FDE cycle
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Cores, cache and clock speed
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Instruction sets and embedded systems
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Input and output devices
Input devices
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Output devices
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Sensors
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Data storage
Primary storage: RAM and ROM
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Secondary storage: magnetic, optical and solid-state
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Virtual memory and cloud storage
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Network hardware
Network hardware: NIC, MAC and IP addresses, routers
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Unit 4
Software
Types of software and interrupts
System software, application software and operating systems
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Firmware and interrupts
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Programming languages, translators and IDEs
High-level languages, low-level languages and assembly language
0%
Compilers and interpreters
0%
Integrated development environments (IDEs)
0%
Unit 5
The internet and its uses
The internet and the world wide web
The internet, the world wide web, URLs and HTTP(S)
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Web browsers, locating web pages and cookies
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Digital currency
Digital currency and blockchain
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Cyber security
Cyber security threats
0%
Keeping data safe: security solutions
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Unit 6
Automated and emerging technologies
Automated systems
Automated systems
0%
Robotics
Robotics
0%
Artificial intelligence
Artificial intelligence
0%
Avg
score:
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Topics
done:
0/39

Robotics

Practise 25 exam-style questions on Robotics for Cambridge IGCSE Computer Science (Paper 1). Write your answer as you would in the exam and get it marked in seconds against the mark scheme, point by point, with an AI tutor on hand if you get stuck.

  • 25 questions
  • 1–6 marks each
  • Instant marking
  • No sign-up needed
20 questions, marked as you go

Sample questions with model answers

Here are 4 of the questions in this topic, each with a model answer, an explanation of why it earns the marks and the mark scheme an examiner would use.

Question 1

1 mark

Name one type of sensor that a driverless car could use to detect pedestrians.

Model answer

A LiDAR sensor.

Explanation

Driverless cars combine several sensors that detect objects around them: cameras, LiDAR (which uses laser light), radar and ultrasonic sensors. The microprocessor uses the data to decide when to brake or steer. GPS gives the car's position, not the position of pedestrians.

Mark scheme
  1. 1 mark

    Any one from: camera; LiDAR (laser) sensor; radar; ultrasonic / proximity sensor; infrared sensor

    do not accept GPS, light sensor or pressure sensor

Question 2

2 marks

Explain why heavy rain, snow or fog can be a problem for driverless cars.

Model answer

Rain, snow or fog can block the car's cameras and LiDAR sensors or cover the road markings. The car may then fail to detect pedestrians or the edge of the road, which could cause an accident.

Explanation

A driverless car is only as good as the data from its sensors. Bad weather reduces the quality of that data, so the microprocessor may make wrong decisions. The second mark needs the consequence for the car's safety.

Mark scheme
  1. 1 mark

    The weather can block or interfere with the sensors (e.g. cameras or LiDAR) / hide road markings

  2. 1 mark

    So the car may not detect obstacles, pedestrians or the edge of the road correctly, increasing the risk of an accident / the car may have to stop or hand control back to a driver

Question 3

3 marks

A drone is used to deliver medicines to a remote village.

Explain why the drone is classed as a robot. Refer to the three characteristics of a robot in your answer.

Model answer

The drone has a mechanical framework: a light body with arms holding its propellers. It has electrical components: sensors such as GPS and cameras, a microprocessor that processes their data, and motors (actuators) that spin the propellers. It is programmable, because it can be given a flight route to the village and reprogrammed with a new route for the next delivery.

Explanation

To show that something is a robot, apply each characteristic to it: framework, electrical components (sensors, microprocessor, actuators) and programmable. Simply listing the three characteristics without linking them to the drone earns limited credit.

Mark scheme
  1. 1 mark

    Mechanical structure: it has a frame / body with arms and propellers (rotors)

    each characteristic must be applied to the drone

  2. 1 mark

    Electrical components: it has sensors (e.g. GPS, camera, accelerometer, proximity sensors), a microprocessor and actuators (motors that spin the propellers)

  3. 1 mark

    Programmable: it can be programmed with its flight route / destination and reprogrammed for different deliveries

Question 4

4 marks

A fruit farm is considering using robots to pick its strawberries.

Explain one advantage and one disadvantage of using the robots.

Model answer

Advantage: the robots can keep picking through the night, so the strawberries are all harvested while they are ripe and less fruit goes rotten.

Disadvantage: strawberries are soft and easily damaged, and a robot may bruise them or miss berries hidden under leaves, which reduces the amount of fruit the farm can sell.

Explanation

When the question gives a context, link each point to it: strawberries are delicate and seasonal, which makes speed and gentle handling important. An advantage or disadvantage stated without its effect on the farm scores only one mark.

Mark scheme
  1. 1 mark

    Advantage: robots can pick 24/7, including at night

    max 2 for the advantage (point and expansion) and max 2 for the disadvantage

  2. 1 mark

    so the harvest is done quickly while the fruit is ripe / less fruit spoils

  3. 1 mark

    Advantage: solves the problem of finding enough seasonal workers

  4. 1 mark

    so the crop is not left unpicked / lower labour costs

  5. 1 mark

    Advantage: cameras identify ripe fruit consistently

  6. 1 mark

    so unripe fruit is left to ripen and less is wasted

  7. 1 mark

    Disadvantage: robots are very expensive to buy and maintain

  8. 1 mark

    so a small farm may not be able to afford them / it takes years to recover the cost

  9. 1 mark

    Disadvantage: robots may damage delicate fruit or miss fruit hidden by leaves

  10. 1 mark

    reducing the amount of fruit that can be sold

Ready to try the rest? Every answer you write is marked against the mark scheme, so you can see exactly where the marks are.

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