Computer Science Engineering (CSE) Exam>Computer Science Engineering (CSE) Notes>Compiler Design>Previous Year Questions: Matching
Q1: Consider the following two sets: (2024 SET 2)
Set X Set Y
P. Lexical Analyzer 1. Abstract Syntax Tree
Q. Syntax Analyzer 2. Token
R. Intermediate Code Generator 3. Parse Tree
S. Code Optimizer 4. Constant Folding
Which one of the following options is the CORRECT match from Set X to Set Y ?
(a ) P-4; Q-1; R-3; S-2
(b) P-2; Q-3; R-1; S-4
(c) P-2; Q-1; R-3; S-4
(d) P-4; Q-3; R-2; S-1
Ans:(b)
Sol:
- Lexical analysis → tokens
- Syntax analysis → parse tree
- ICG → abstract syntax tree
- code optimization →constant folding (it is one of the code optimization methods)
Option (B) is correct
Q2: Match the following according to input (from the left column) to the complier phase (in the right column) that processes it. (2017 SET 2)
(a) P-(ii),Q-(iii), R-(iv), S-(i)
(b) P-(ii),Q-(i), R-(iii), S-(iv)
(c) P-(iii),Q-(iv), R-(i), S-(ii)
(d) P-(i),Q-(iv), R-(ii), S-(iii)
Ans:(c)
Sol: Correct Option: C
- Q - iv because Character stream is given as input to lexical analyzer
- P - iii Syntax tree is given as input to semantic analyzer
- R - i Intermediate code given as input to code generator
- S - ii Token stream given as input to syntax analyzer
Q3: Match the following: (2015 SET 2)
P. Lexical analysis 1. Graph coloring
Q. Parsing 2. DFA minimization
R. Register allocation 3. Post-order traversal
S. Expression evaluation 4. Production tree
Ans:(c)
Sol:
1. Regular expression uses FA & Regular Sets.
2. Expression can be evaluated with postfix Traversals.
3. Register allocation can be modeled by graph coloring.
4. The parser constructs a production tree.
Q4: Match all items in Group 1 with correct options from those given in Group 2. (2009)
(a)P-4. Q-1, R-2, S-3
(b) P-3, Q-1, R-4, S-2
(c) P-3, Q-4, R-1, S-2
(d) P-2, Q-1, R-4, S-3
Ans: (b)
Sol:Regular expressions are used in lexical analysis.
Pushdown automata is related to context free grammar which is related to syntax analysis.
Dataflow analysis is done in code optimization.
Register allocation is done in code generation.
Correct Option: B
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 | Aug 18, 2024 Last updated |
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