GATE CS 2016 Set 2 — Question 29
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Compiler Design → Lexical Analysis → Activation Records
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Question
Match the following:
| (P) Lexical analysis | (i) Leftmost derivation |
| (Q) Top down parsing | (ii) Type checking |
| (R) Semantic analysis | (iii) Regular expressions |
| (S) Runtime environments | (iv) Activation records |
Correct answer
(B) P rightarrow iii, Q rightarrow i, R rightarrow ii, S rightarrow iv
Solution
The correct matching is:
- (P) Lexical analysis: Uses (iii) Regular expressions to define tokens.
- (Q) Top down parsing: Uses (i) Leftmost derivation to generate the string.
- (R) Semantic analysis: Performs (ii) Type checking to ensure type compatibility.
- (S) Runtime environments: Manage memory using (iv) Activation records (stack frames) for function calls.
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