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Questions and Answers
In a Pushdown Automata (PDA), which state is typically the initial state?
In a Pushdown Automata (PDA), which state is typically the initial state?
- q1
- qf
- q0 (correct)
- q2
What is the purpose of the Start Symbol in a PDA?
What is the purpose of the Start Symbol in a PDA?
- To represent the stack alphabet
- To mark the states in the PDA
- To initialize the stack with a specific symbol (correct)
- To indicate the beginning of the input string
Which of the following represents a production rule in a Context-Free Grammar (CFG)?
Which of the following represents a production rule in a Context-Free Grammar (CFG)?
- S -> a S A (correct)
- q1, a, S = {q1, SA}
- A -> b B
- (q1, b, A) = {q1, B}
What does the transition (q1, a, S) = { (q1, SA) } represent in a PDA?
What does the transition (q1, a, S) = { (q1, SA) } represent in a PDA?
Which assumption must be satisfied for converting a PDA to a CFG?
Which assumption must be satisfied for converting a PDA to a CFG?
What is the role of symbol 'z' in the context of PDAs?
What is the role of symbol 'z' in the context of PDAs?
How does a PDA typically enter its final state?
How does a PDA typically enter its final state?
Which of the following correctly describes a production rule in the form A -> b B?
Which of the following correctly describes a production rule in the form A -> b B?
What does it mean when a transition rule in a PDA increases the stack content by a single symbol?
What does it mean when a transition rule in a PDA increases the stack content by a single symbol?
Which of these transitions is not valid according to PDA rules?
Which of these transitions is not valid according to PDA rules?
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