Compiler Design

Code Optimization Intermediate Code Generation Lexical Analysis Parsing Techniques - LL/LR Runtime Environment Syntax Directed Translation

Q. Which of the following statements about intermediate code is true?

Solution

Intermediate code can be optimized before final code generation, allowing for better performance on the target architecture.

Correct Answer: C — It can be optimized before final code generation

Q. Which of the following statements is true about LL and LR parsers?

Solution

LR parsers can handle all LL grammars, but not all LR grammars can be parsed by LL parsers.

Correct Answer: B — LR parsers can handle all LL grammars.

Q. Which of the following tools is commonly used to implement a lexical analyzer?

Solution

Lex is a tool specifically designed for generating lexical analyzers.

Correct Answer: B — Lex

Q. Which optimization technique can help reduce the number of memory accesses?

Solution

Loop fusion can help reduce the number of memory accesses by combining multiple loops that iterate over the same data.

Correct Answer: A — Loop fusion

Q. Which optimization technique can lead to a trade-off between speed and memory usage?

Solution

Function inlining can lead to a trade-off between speed and memory usage, as it increases code size but can reduce function call overhead.

Correct Answer: A — Function inlining

Q. Which optimization technique focuses on reducing the number of instructions executed?

Solution

Constant folding focuses on reducing the number of instructions executed by evaluating constant expressions at compile time.

Correct Answer: B — Constant folding

Q. Which optimization technique involves removing code that does not affect the program's output?

Solution

Dead code elimination is the optimization technique that removes code that does not affect the program's output.

Correct Answer: B — Dead code elimination

Q. Which parsing technique is generally more powerful, LL or LR?

Solution

LR parsing is generally more powerful than LL parsing as it can handle a larger class of grammars.

Correct Answer: B — LR

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