Podcast
Questions and Answers
What is a pushdown automaton (PDA)?
What is a pushdown automaton (PDA)?
- A type of finite state machine with a control unit and input tape
- An automaton with a fixed amount of information storage
- A way to implement a context-free grammar with a stack for memory (correct)
- A machine with infinite memory for recognizing regular grammars
What does a pushdown automaton (PDA) have in addition to a finite state machine?
What does a pushdown automaton (PDA) have in addition to a finite state machine?
- Extra memory for recognizing regular grammars
- An input tape, control unit, and a stack with infinite size (correct)
- A fixed amount of information storage
- A stack head for scanning the top symbol of the stack
What does the stack of a pushdown automaton do?
What does the stack of a pushdown automaton do?
- A fixed amount of memory
- Scan the bottom symbol of the stack
- Push: add a new symbol at the top, Pop: read and remove the top symbol (correct)
- Remember a finite amount of information
What operation does a pushdown automaton (PDA) have to perform in every transition?
What operation does a pushdown automaton (PDA) have to perform in every transition?
How does a pushdown automaton (PDA) differ from a DFA?
How does a pushdown automaton (PDA) differ from a DFA?
In the context of pushdown automaton (PDA), what is the main purpose of the stack?
In the context of pushdown automaton (PDA), what is the main purpose of the stack?
What are the three main components of a pushdown automaton (PDA)?
What are the three main components of a pushdown automaton (PDA)?
What type of operation does the stack perform in a pushdown automaton?
What type of operation does the stack perform in a pushdown automaton?
What does a pushdown automaton (PDA) have in addition to a finite state machine?
What does a pushdown automaton (PDA) have in addition to a finite state machine?
What does the stack head of a pushdown automaton scan in every transition?
What does the stack head of a pushdown automaton scan in every transition?
What is the main purpose of the stack in a pushdown automaton (PDA)?
What is the main purpose of the stack in a pushdown automaton (PDA)?
What are the three main components of a pushdown automaton (PDA)?
What are the three main components of a pushdown automaton (PDA)?
In a pushdown automaton (PDA), what does the stack head scan in every transition?
In a pushdown automaton (PDA), what does the stack head scan in every transition?
What type of operation does the stack perform in a pushdown automaton (PDA)?
What type of operation does the stack perform in a pushdown automaton (PDA)?
How does a pushdown automaton (PDA) differ from a deterministic finite automaton (DFA)?
How does a pushdown automaton (PDA) differ from a deterministic finite automaton (DFA)?
