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CS 313 F21 - Quiz 02 - Syntax and Semantics
Please complete this quiz after reviewing the lecture materials. You may refer to the lecture materials (anything directly linked from the current lecture page) while taking the quiz but you may not talk to other students or search the web. Please use your
middlebury.edu
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What are Syntax and Semantics?
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1 point
Syntax is spelling, Sematics is grammar
Syntax is grammar, Semantics is spelling
Syntax is meaning, Semantics is grammar/spelling
Syntax is grammar/spelling, Semantics is meaning
Valid syntax for a programming language is usually specified using
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1 point
regular expressions
a context-free grammar
a clear description in English
Algorithmic checking of syntax / semantics
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Careful, this one is tricky and was only briefly mentioned in the video - if you've taken CS 301 it might help you.
1 point
Correct syntax of a program can be checked algorithmically
Correct semantics of a program can be checked algorithmically
Both of the first two statements are true
Neither of the first two statements are true
In the following BNF rule, what are the terminals? <stmt> ::= <variable> = <expr> ;
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1 point
<stmt>
<variable> <expr>
::=
= ;
What is (1 - 2) * 3 in prefix?
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Also tricky! Hint: visualize the expression tree.
1 point
- 1 2 * 3
* 3 - 1 2
1 2 - 3 *
* - 1 2 3
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