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Truth tables

Quiz by GCSE Computer Science Teacher 3

GCSE (AQA)
Computer Science
English National Curriculum

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Measures 1 skill from
GCSE (AQA)
Computer Science
English National Curriculum

3.4.2.a

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14 questions
Show answers
  • Q1
    What is a truth table?
    They determine the output of one input
    They list all the possible inputs and outputs of a logic gate
    They work out if a statement is true or not
    They list only the inputs of a logic gate
    60s
    3.4.2.a
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  • Q2
    The truth table above is for which gate?
    Question Image
    a AND B
    NOT a
    a OR b
    a XOR b
    45s
    3.4.2.a
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  • Q3
    The above truth table is for which gate?
    Question Image
    a AND b
    NOT a
    a OR b
    a XOR b
    45s
    3.4.2.a
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    Delete
  • Q4
    The above truth table is for which gate?
    Question Image
    NOT a
    a AND b
    a OR b
    a XOR b
    45s
    3.4.2.a
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    Delete
  • Q5
    The above truth table is for which gate?
    Question Image
    (NOT a) AND b
    NOT a XOR b
    NOT a AND b
    NOT a OR b
    60s
    3.4.2.a
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  • Q6
    The above truth table is for which gate?
    Question Image
    (NOT a) AND b
    NOT a AND b
    (NOT a) NOT b
    (NOT a) OR b
    60s
    3.4.2.a
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  • Q7
    If a truth table with two inputs will have 4 rows, how many must a truth table with three input have?
    8
    7
    6
    12
    60s
    3.4.2.a
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  • Q8
    Which formula correctly represents the maximum number of rows in relation to the number of inputs?
    max_rows = inputs^2
    max_rows = inputs + 2
    max_rows = inputs * 2
    max_rows = max_rows - inputs
    60s
    3.4.2.a
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  • Q9
    In what order would these inputs be displayed in a truth table?
    Question Image
    Z, C, B, A
    A, C, Z, B
    A, B, C, Z
    A, B, Z, C
    60s
    3.4.2.a
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  • Q10
    What is the missing value?
    Question Image
    0
    1
    60s
    3.4.2.a
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  • Q11
    Why is C is not considered when deciding how many inputs there are, and therefore how many rows are needed in the truth table?
    Question Image
    Because C is only an input
    Because C is also an output
    Because it is easier to not include C
    Because you can only include pairs of inputs
    60s
    3.4.2.a
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  • Q12
    How many of these are both inputs AND outputs?
    Question Image
    1
    6
    4
    2
    60s
    3.4.2.a
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  • Q13
    How many of these are only inputs?
    Question Image
    6
    4
    2
    1
    60s
    3.4.2.a
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  • Q14
    What is one disadvantage of truth tables for combined logic gates?
    It time taken to draw one does not outweigh the outcome of the process
    If you make a mistake earlier in the table it will make the rest of the results in that row invalid
    It is not an efficient way of testing for possible outcomes
    It is easier to not use a truth table
    60s
    3.4.2.a
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