Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skillsβperfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a Pushdown Automaton (PDA)?
π‘ Hint: Think about how a finite automaton works but consider additional memory.
Question 2
Easy
What does it mean to accept by an empty stack?
π‘ Hint: Consider what happens to the stack during processing.
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 a PDA use to recognize context-free languages?
- A Queue
- A Stack
- A Register
π‘ Hint: Consider how memory structures differ in automata.
Question 2
True or False: A PDA can use final state acceptance as its only method of accepting strings.
- True
- False
π‘ Hint: Reflect on both acceptance criteria described.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Construct a PDA for a CFG that generates a language like L = { a^n b^n c^n | n >= 0 }. Explain whether this PDA can be constructed and why.
π‘ Hint: Consider the stacking limitations and how it handles multiple transitions.
Question 2
Given the CFG S β AB, A β aA | Ξ΅, and B β bB | Ξ΅, describe how a PDA could accept strings generated by this CFG.
π‘ Hint: Use your understanding of how terminals and variables interact in the PDA.
Challenge and get performance evaluation