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Which of the following is true about SLR parsing?

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Question: Which of the following is true about SLR parsing?

Options:

  1. It uses a single lookahead token.
  2. It is a type of LL parsing.
  3. It can handle all context-free grammars.
  4. It is less powerful than canonical LR parsing.

Correct Answer: It is less powerful than canonical LR parsing.

Solution: 

SLR parsing is less powerful than canonical LR parsing as it uses a simpler method for constructing the parsing table.

Which of the following is true about SLR parsing?

Practice Questions

Q1
Which of the following is true about SLR parsing?
  1. It uses a single lookahead token.
  2. It is a type of LL parsing.
  3. It can handle all context-free grammars.
  4. It is less powerful than canonical LR parsing.

Questions & Step-by-Step Solutions

Which of the following is true about SLR parsing?
  • Step 1: Understand what SLR parsing is. SLR stands for Simple LR parsing, which is a method used in compilers to analyze the structure of programming languages.
  • Step 2: Know that SLR parsing is a type of LR parsing. LR parsing is a way to read input from left to right and produce a rightmost derivation.
  • Step 3: Learn that SLR parsing is less powerful than canonical LR parsing. Canonical LR parsing can handle more complex grammars than SLR parsing.
  • Step 4: Recognize that the difference in power comes from how the parsing tables are constructed. SLR uses a simpler method, which makes it easier to implement but limits its capabilities.
  • Step 5: Conclude that while SLR parsing is useful, it cannot handle all the same cases as canonical LR parsing due to its simpler approach.
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