ACtE07 · Chapter 7Theory of Computation & Graphics🏛️ Past Licensure QuestionID: ced07197
A Pushdown Automaton that has at most one valid move for any given combination of current state, input symbol, and stack top symbol is called a:
A Pushdown Automaton that has at most one valid move for any given combination of current state, input symbol, and stack top symbol is called a:
Multiple Choice Options
- A
Non-deterministic PDA (NPDA)
- B✓ Correct Option
Deterministic Pushdown Automaton (DPDA)
- C
Linear Bounded Automaton
- D
Multi-tape Turing Machine
Detailed Technical Solution & Explanation
A DPDA is a pushdown automaton where the transition relation permits at most one transition for any configuration , and if an -move is possible, no input-consuming transition is allowed from that configuration.
Option Analysis:
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Option A (Non-deterministic PDA (NPDA)): Allows multiple branching choices for a given configuration.
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Option B (Deterministic Pushdown Automaton (DPDA)): Correct. Standard formal term for single-choice PDA.
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Option C (Linear Bounded Automaton): Tape-bounded Turing machine model.
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Option D (Multi-tape Turing Machine): General computational model with multiple tapes.
Reference: Demo2 · Set 1NEC Licensure Syllabus