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CompTIA A+ Computer Science — practice by topic

Browse 30 questions across 3 Computer Science topics. Choose what you want to revise, then open a question to check its answer and worked solution.

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Computer Science topics

Computer Hardware (30)Computer Science (30)Information Technology (30)

Try a Computer Science question

A browser turns a typed web address into a long number that identifies the machine. That number is an:Read the answer and worked solution →A computer system splits into two major parts: software and:Read the answer and worked solution →A single 1 or 0 stored inside a computer is called a:Read the answer and worked solution →A technician converts four bytes into bits. The total number of bits is:Read the answer and worked solution →

Worked practice questions

A browser turns a typed web address into a long number that identifies the machine. That number is an:

  1. IP address
  2. IT address
  3. ID address
  4. IX address
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Correct answer: A. IP address

1. A name means nothing to the machines carrying the data. 2. They route by a numeric label instead, much like a phone number. 3. That label is the IP address. _Source: OpenStax Introduction to Computer Science, Chapter 5, Computer Systems Design._

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A computer system splits into two major parts: software and:

  1. Hyperlink
  2. Hardware
  3. Homepage
  4. Handbook
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Correct answer: B. Hardware

1. One part is the programs and the data they work on. 2. The other is the physical machinery running them. 3. That physical part is the hardware. _Source: OpenStax Introduction to Computer Science, Chapter 5, Computer Systems Design._

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A single 1 or 0 stored inside a computer is called a:

  1. Bit
  2. Bin
  3. Bus
  4. Box
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Correct answer: A. Bit

1. Everything stored is reduced to two possible states. 2. One such state is the smallest unit of storage there is. 3. That unit is a bit. _Source: OpenStax Introduction to Computer Science, Chapter 5, Computer Systems Design._

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How to practise

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  2. Open the question to check the correct answer and read its worked solution.
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