Lexical Analysis Phase

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Questions and Answers

What is the purpose of combining all keywords into one transition diagram?

  • To improve program readability
  • To reduce compilation time
  • To save memory space
  • To make the program more efficient (correct)

Why is it challenging to combine the diagram for identifiers with that for keywords?

  • It is unclear which state to be in when certain characters are encountered (correct)
  • Identifiers and keywords have different token values
  • Identifiers and keywords have conflicting transition rules
  • Identifiers and keywords share common states

Which token class has all relops combined into it?

  • Keywords
  • Identifiers
  • Constants
  • Relops (correct)

In the given context, what is meant by 'backtracking'?

<p>Returning to a previous state in the diagram (D)</p> Signup and view all the answers

Why is it more efficient to have a single transition diagram instead of multiple ones?

<p>Avoids the need for backtracking and rescanning (D)</p> Signup and view all the answers

What issue arises when trying to determine whether to be in state 3 or state 24 when encountering the letters BEG?

<p>Transition ambiguity due to shared states (C)</p> Signup and view all the answers

What is the main advantage of treating each keyword as a separate token?

<p>Reduces confusion in state transitions (D)</p> Signup and view all the answers

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