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In the context of LL parsing, what does the '1' in LL(1) signify?

Practice Questions

Q1
In the context of LL parsing, what does the '1' in LL(1) signify?
  1. One lookahead token is used.
  2. One leftmost derivation is produced.
  3. One parsing table is required.
  4. One recursive call is made.

Questions & Step-by-Step Solutions

In the context of LL parsing, what does the '1' in LL(1) signify?
  • Step 1: Understand that LL parsing is a method used to analyze the structure of programming languages.
  • Step 2: The 'L' in LL stands for 'Left-to-right' scanning of the input.
  • Step 3: The second 'L' stands for 'Leftmost derivation', which means it builds the parse tree from the left side.
  • Step 4: The '(1)' indicates how many tokens the parser looks ahead to make decisions.
  • Step 5: In LL(1), the parser looks at 1 token ahead in the input to decide what to do next.
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