1
What are Number Bases and how are they used?
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Understand the numbers bases below, and their usage in computer science.
- What is decimal (base 10)
- What is binary (base 2)
- What is hexadecimal (base 16).
- Converting between the following (both directions):
- binary and decimal
- binary and hexadecimal
- decimal and hexadecimal.
2
What are units of information in computer science?
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Understand the following, and be able to convert between them.
- a bit is the fundamental unit of information
- a byte is a group of 8 bits.
- a kilobyte (1kB) is 1,000 bytes
- a megabyte (1MB) is 1,000 kilobytes
- a gigabyte (1GB) is 1,000 megabytes
- a terabyte (1TB) is 1,000 gigabytes.
3
How do you perform Binary Arithmetic?
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- How do you add binary numbers together?
- How do you perform multiplication or division using binary shifts?
4
What is character encoding?
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- What is a character set and how are they used in computer science?
- What is ASCII
- What is UNICODE
5
How do computers represent images?
6
How do computers represent sounds?
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- What is analogue sound and why can’t computers store it?
- How do computers convert natural sound into digital sound?
- How do I work out the file size of a sound file?