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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a DFA?
💡 Hint: Think about how it processes input strings.
Question 2
Easy
Define what a token is in lexical analysis.
💡 Hint: Consider the output of the scanning process.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does the DFA do during token recognition?
- Verifies the validity of a statement
- Recognizes patterns in the input character stream
- Compiles the source code
💡 Hint: Think about the purpose of lexical analysis.
Question 2
True or False: The longest match principle means the scanner can stop at the first matching token it finds.
- True
- False
💡 Hint: What would happen if you stopped early?
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
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.
Question 2
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.
Challenge and get performance evaluation