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GATE CSE & IT · Lexical Analysis · 2026-2026

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Hopcroft-Ullman / Dragon Book

Automata, languages, parsing, syntax-directed translation

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2026 PYQ

A lexical analyzer uses the following token definitions letter → [A - Za - z] digit → [0-9] id → letter (letter $\mid$ digit)* number → digit $^{+}$ ws → (blank | tab | newline) ${...

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