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Questions and Answers
Questions and Answers
What is the formal definition of a Pushdown Automaton (PDA)?
What is the formal definition of a Pushdown Automaton (PDA)?
- A mathematical model of computation introduced by Alan Turing in 1936
- A type of automaton used in formal language theory but without additional memory
- A model used in theoretical computer science to process input strings sequentially
- An extension of finite automata with an additional stack memory, allowing it to recognize context-free languages (correct)
What is the main difference between a Turing Machine and a Pushdown Automaton?
What is the main difference between a Turing Machine and a Pushdown Automaton?
- A Turing Machine can recognize more complex languages than a Pushdown Automaton (correct)
- A Pushdown Automaton has an additional stack memory, while a Turing Machine does not
- A Turing Machine does not have memory, unlike a Pushdown Automaton
- A Pushdown Automaton processes input strings sequentially, unlike a Turing Machine
What does a Context-Free Grammar (CFG) describe?
What does a Context-Free Grammar (CFG) describe?
- The syntax of a language using a set of production rules (correct)
- The vocabulary of a language using a set of production rules
- The structure of a language using a set of production rules
- The semantics of a language using a set of production rules
What is the defining feature of a Turing Machine?
What is the defining feature of a Turing Machine?
What is the purpose of a Linear Bounded Automata?
What is the purpose of a Linear Bounded Automata?
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Flashcards
Flashcards
Pushdown Automaton
Pushdown Automaton
A type of automaton that extends finite automata by adding a stack memory, enabling it to recognize context-free languages.
Context-Free Grammar
Context-Free Grammar
A set of production rules describing the syntax of a language. It allows defining the structure of sentences or expressions.
Turing Machine
Turing Machine
A theoretical model of computation with a read/write head and an infinite tape, capable of recognizing and processing a wide range of languages.
Context-Sensitive Language
Context-Sensitive Language
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Linear Bounded Automata
Linear Bounded Automata
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Study Notes
Study Notes
Formal Definition of a Pushdown Automaton (PDA)
- A Pushdown Automaton (PDA) is a theoretical machine that can be used to recognize context-free languages
- A PDA consists of a finite state machine and a stack data structure
Comparison between Turing Machine and Pushdown Automaton
- The main difference between a Turing Machine and a Pushdown Automaton is that a Turing Machine has a two-way infinite tape, whereas a PDA has a one-way infinite stack
Context-Free Grammar (CFG)
- A Context-Free Grammar (CFG) is a set of production rules that describe how to generate strings of a language
- A CFG describes a language generated by a PDA
Defining Feature of a Turing Machine
- The defining feature of a Turing Machine is its ability to read and write symbols on an infinite tape
Linear Bounded Automata
- The purpose of a Linear Bounded Automata is to recognize the class of context-sensitive languages
- A Linear Bounded Automata is a non-deterministic Turing Machine with a tape of bounded length
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