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A2 Computing - BNF revision quiz
created by
046050
on 5 May 16, enabled by
MWAPOLENI
Web sites
Medium level
(79% of success)
7 questions - 6 players
This quiz contains questions on BNF and syntax diagrams for the OCR A2 computing course.
1
In BNF, what does '|' mean?
And
Or
Not
2
What does 'BNF' stand for?
Backus-Naur Form
Big Normal Form
Binary Normal Form
3
What is the need for BNF?
To unambiguously define the algorithms of computer language.
To unambiguously define the syntax of computer language.
None of the above
4
A system uses the following definitions in BNF.
< DIGIT > : : = 0|1|2|3|4
< CHAR > : : = P|Q|R|S
< CODE > : : < DIGIT > < CHAR > | < DIGIT > < CODE >
Why is T3 not a valid code?
T is not
3 is not
It is too short
5
Rules :
< LETTER > : : = A|B|C
< DIGIT > : : = 0|1|2|3|4|5|6|7|8|9
Which of the following are valid?
[email protected]
F55
[email protected]
6
A value has at least 3 digits. Using BNF, define "value".
< VALUE > : : = < DIGIT >< DIGIT >< DIGIT
< VALUE > : : = < DIGIT >< DIGIT >< DIGIT > | < VALUE > < DIGIT >
< VALUE > : : = < DIGIT >
7
Which of the following stack codes are invalid?
A : 0
Z : A
None, they are all valid
Let's GO
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created
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Average on
6 players
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Generated on 11 Aug 22, 3h56