
2.4 G3 Computhink - Data Representation (Text)
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Computers
9th - 12th Grade

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8 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Refer to the ASCII table. What is the 8-bit ASCII code for the uppercase letter ‘H’?
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Refer to ASCII table. What is the hexadecimal representation of the ASCII code for the exclamation mark ‘!’?
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Refer to ASCII table. Decode the following sequence of bytes using an ASCII table. Each byte represents a character and is encoded as 2 hexadecimal digits: 48 45 4C 4C 4F
Answer explanation
H - > 48, E ->45, L -> 4C, O -> 4F
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How many characters can be represented in 8-bit Extended ASCII?
Answer explanation
Extended ASCII uses 8 bits per character, allowing for 2⁸ = 256 characters. The original 7-bit ASCII could only store 128 characters.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How many characters can be represented in 7-bit ASCII?
Answer explanation
Extended ASCII uses 8 bits per character, allowing for 2⁸ = 256 characters. The original 7-bit ASCII could only store 128 characters.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following best describes the main difference between ASCII and Unicode?
Answer explanation
ASCII is fixed at 8 bits per character (Extended ASCII). Unicode allows variable-length encoding (8 to 32 bits), making it more suitable for multiple languages.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following correctly explains how ASCII characters are stored in a computer?
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