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The lexical analysis for a modern computer language such as Java needs the power of which one of the following machine models in a necessary and sufficient sense?
  • a)
     Finite Automata
  • b)
     Deterministic Pushdown Automata
  • c)
     Non-deterministic Pushdown Automata
  • d)
     Turing machine
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
The lexical analysis for a modern computer language such as Java needs...
Finite Automata(FA):
The first phase of the compiler is called lexical analysis or scanning. The lexical analyzer reads the stream of characters making up the source program and groups the characters into a meaningful sequence called lexemes.
For each lexeme, the lexical analyzer produces tokens as output for the parser and tokens are expressed in regular expressions.
So, a simple finite automaton is sufficient for it.
Phases in a compiler:
Hence, the correct option is (A).
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The lexical analysis for a modern computer language such as Java needs the power of which one of the following machine models in a necessary and sufficient sense?a)Finite Automatab)Deterministic Pushdown Automatac)Non-deterministic Pushdown Automatad)Turing machineCorrect answer is option 'A'. Can you explain this answer?
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