2024-25 - Y8 - Data Representation - Quiz 4

In the English alphabet there are 26 different letters. To encode each letter with a unique binary number, how many bits would need to be used?

• 1 bit
• 3 bits
• 5 bits
• 7 bits

Which of these best describes a character set?

• The possible characters that can be represented and used by a computer system
• The programming languages that can be used in a computer system
• The fonts that a computer system has installed
• The words that the computer system understands

Which of these best describe the reason why character sets were developed?

• To ensure that text could appear on screen
• To ensure keyboards were invented
• To ensure that computing devices could turn on
• To ensure all computing devices could communicate with each other using the same encoding system

Which of these is the name of a character set?

• ATM
• AMD
• ASCII
• API

ASCII originally used 7 bits per character but now uses 8 bits per character. How many characters can this represent?

• 64
• 128
• 256
• 512

How did the first 128 characters of the original 7-bit ASCII remain compatible when extended to an 8-bit system?

• They were shifted to a different range of numbers to make space for new characters.
• A 0 was added at the beginning of the 8-bit representation, leaving the original values unchanged.
• They were replaced by new characters.
• The first 128 characters were copied to the extended range, appearing in both the lower and upper 128 slots.

The image shows the ASCII decimal and binary codes for letters ABC. What would be the decimal and binary code for the letter D?

• 
• 
• 
• 

The image shows the ASCII decimal and binary codes for letters ABCD. What is spelled out by the following binary code: 01000011 01000001 01000010

• ABC
• DAB
• BAD
• CAB

The image shows the ASCII decimal and binary codes for letters ABCD. Which binary codes spell out the word BAD?

• 01000010 01000001 01000100
• 01000010 01000011 01000100
• 01000001 01000010 01000011
• 01000011 01000001 01000100

Which of these is the name of another character set?

• Upload
• USB
• UNIX
• Unicode