Quizalize logo
placeholder image to represent content

Comparing ASCII and Unicode

Quiz by GCSE Computer Science Teacher 2

GCSE (AQA)
Computer Science
English National Curriculum

Feel free to use or edit a copy

includes Teacher and Student dashboards

Track each student's skills and progress in your Mastery dashboards

With a free account, teachers can
  • edit the questions
  • save a copy for later
  • start a class game
  • automatically assign follow-up activities based on students’ scores
  • assign as homework
  • share a link with colleagues
  • print as a bubble sheet

Our brand new solo games combine with your quiz, on the same screen

Correct quiz answers unlock more play!

New Quizalize solo game modes
12 questions
Show answers
  • Q1
    Which of these statement is not true about ASCII?
    The first binary representation of an ASCII character is always 0
    It uses 8 bit encoding
    It uses variable bit size encoding
    It can hold up to 128 characters
    45s
    3.3.5.c
  • Q2
    Which of these statements is not true about Unicode?
    It can represent over 65,000 characters
    It can be used to represent emojis
    It uses variable size encoding
    It can only represent left to right written languages such as English or French
    45s
    3.3.5.c
  • Q3
    Which of these bit encoding sizes can Unicode not use?
    16
    32
    4
    8
    45s
    3.3.5.c
  • Q4
    What does extended ASCII do?
    Uses the first bit, normally set to 0, to hold an additional 128 characters
    Allows an additional 255 characters to be represented by using 16 bit encoding
    Allows an additional 255 characters to be represented by using 8 bit encoding
    Uses the last bit, usually set to 0, to hold an additional 128 characters
    45s
    3.3.5.c
  • Q5
    Why would ASCII not work to encode a document written in Chinese or Arabic?
    ASCII is only to be used for American English
    Each country has its own encoding method
    Computers can only understand American coding
    There are not enough characters to represent the language
    45s
    3.3.5.c
  • Q6
    Why does Unicode use more memory than ASCII?
    It uses more bits to represent the characters
    45s
    3.3.5.c
  • Q7
    If writing a large document in standard English, which character encoding set would be more efficient for memory?
    Unicode
    ASCII
    Hexadecimal
    Binary
    45s
    3.3.5.c
  • Q8
    What is the correct name given to storing items in 16 bit Unicode?
    UNI - 16
    UTF - 16
    UTF - 116
    UFC - 16
    45s
    3.3.5.c
  • Q9
    What is one limitation of ASCII?
    It represents too many characters and can be confusing
    It is difficult to use in modern computing
    It is only suitable for letters and not numbers
    It can only represent a relatively small amount of characters
    45s
    3.3.5.c
  • Q10
    How many characters are the same in ASCII and Unicode?
    127
    255
    32
    128
    45s
    3.3.5.c
  • Q11
    Why can you not use both Unicode and ASCII in one program?
    It will crash the program
    You can, is is common to find both in use
    It is confusing for developers
    Because one cancels out the other
    45s
    3.3.5.c
  • Q12
    What character encoding set would Google translate need to use?
    Binary
    Hexademical
    ASCII
    Unicode
    45s
    3.3.5.c

Teachers give this quiz to your class