Practice - Traversing a DFA for Recognizing Tokens: The Scanner's Algorithm
Practice Questions
Test your understanding with targeted questions
What is a DFA?
💡 Hint: Think about how it processes input strings.
Define what a token is in lexical analysis.
💡 Hint: Consider the output of the scanning process.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does the DFA do during token recognition?
💡 Hint: Think about the purpose of lexical analysis.
True or False: The longest match principle means the scanner can stop at the first matching token it finds.
💡 Hint: What would happen if you stopped early?
2 more questions available
Challenge Problems
Push your limits with advanced challenges
Design a simple DFA for recognizing arithmetic expressions, including addition, subtraction, and numbers. Describe how the scanning algorithm would process the input '3 + 5'.
💡 Hint: Think about state transitions and accepting criteria.
Given a string input 'if_else', explain how the longest match principle affects the token recognition and what tokens are generated.
💡 Hint: Consider the implications of prefix matches on token classification.
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Reference links
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