ISAAC Comp Sci: GCSE ASCII & Unicode

What does ASCII stand for?

• Automated Standard Code for Information Interchange

• American System Code for International Interchange

• Advanced System Code for Information Interchange

• American Standard Code for Information Interchange

How many bits are used in the original ASCII to represent characters?

• 9 bits

• 6 bits

• 8 bits

• 7 bits

What is the maximum number of characters that can be represented using 7-bit ASCII?

• 128 characters

• 256 characters

• 64 characters

• 512 characters

Which of the following is NOT a character type represented in ASCII?

• Numbers

• Emojis

• Punctuation

• Letters

How many bit-patterns can be made with 4 bits?

• 8 bit-patterns

• 12 bit-patterns

• 32 bit-patterns

• 16 bit-patterns

What is the binary character code for the letter G in ASCII, if F is 01000110?

• 01000101

• 01000100

• 01001000

• 01000111

What does Unicode aim to represent?

• Only English characters

• Only ASCII characters

• Only numeric characters

• Every character from every alphabet

Which of the following is NOT a Unicode encoding standard?

• UTF-32

• UTF-8

• UTF-16

• UTF-64

How many bytes are used to store a character in ASCII?

• 8 bytes

• 4 bytes

• 2 bytes

• 1 byte

If a text file contains 40 characters and is encoded using 8-bit ASCII, what is the file size in bytes?

• 40 bytes

• 30 bytes

• 50 bytes

• 20 bytes