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A2 Computing - BNF revision quiz

046050
046050
6 played - 9 yrs ago

This quiz contains questions on BNF and syntax diagrams for the OCR A2 computing course.

 

Medium QUIZ 7 QUESTIONS
medium
 
Question 1 / 7

In BNF, what does '|' mean?

 
Question 2 / 7

What does 'BNF' stand for?

 
Question 3 / 7

What is the need for BNF?

 
Question 4 / 7

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?

 
Question 5 / 7
Rules : < LETTER > : : = A|B|C < DIGIT > : : = 0|1|2|3|4|5|6|7|8|9 Which of the following are valid?

Rules :
< LETTER > : : = A|B|C
< DIGIT > : : = 0|1|2|3|4|5|6|7|8|9

Which of the following are valid?

 
Question 6 / 7

A value has at least 3 digits. Using BNF, define "value".

 
Question 7 / 7

Which of the following stack codes are invalid?

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