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Unit 5: Application of Computer Science MCQs — Computer Science (page 2)

30 multiple-choice questions on Unit 5: Application of Computer Science from Computer Science, each with the correct answer and, where available, a teacher's explanation. Read through them to revise the chapter, then practise the same questions one by one to test yourself.

26. A network of everyday objects with sensors that exchange data over the Internet is called:

  1. a LAN
  2. blockchain
  3. SaaS
  4. the Internet of Things

Answer: D) the Internet of Things

Explanation: IoT connects physical "things" with sensors, processors and connectivity. SLO CS-11-E-01

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27. A voice assistant understands American accents well but Pakistani accents poorly. The most likely cause is:

  1. the turtle module
  2. slow Internet
  3. training data that did not represent Pakistani speakers
  4. too much RAM

Answer: C) training data that did not represent Pakistani speakers

Explanation: Unrepresentative training data reflects the designers' choices of whose voices count. SLO CS-11-E-02

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28. The process by which blockchain nodes agree on the next valid block is called:

  1. smoothing
  2. consensus (e.g. proof of work)
  3. routing
  4. encryption

Answer: B) consensus (e.g. proof of work)

Explanation: Consensus mechanisms such as proof of work or proof of stake. SLO CS-11-E-01

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29. Renting virtual servers on which you install your own OS and software is:

  1. PaaS
  2. a private blockchain
  3. SaaS
  4. IaaS

Answer: D) IaaS

Explanation: Infrastructure as a Service gives virtual hardware. SLO CS-11-E-01

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30. Which is a positive impact of AI?

  1. reducing privacy
  2. creating more e-waste
  3. early detection of diseases from medical scans
  4. spreading deepfakes

Answer: C) early detection of diseases from medical scans

Explanation: AI helps doctors detect diseases early. SLO CS-11-E-02

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