# Classification of automata

## What is automata explain classification of automata?

An automaton (Automata in plural) is

**an abstract self-propelled computing device which follows a predetermined sequence of operations automatically**. An automaton with a finite number of states is called a Finite Automaton (FA) or Finite State Machine (FSM).## What are the types of automata?

**There are four major families of automaton :**

- Finite-state machine.
- Pushdown automata.
- Linear-bounded automata.
- Turing machine.

## What are the two types of automata?

Types of Automata:

**DFA(deterministic finite automata)** **NFA(non-deterministic finite automata)**

## What are the different types of languages in automata?

The language generated by the grammar is recognized by a Pushdown automata.

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**According to Chomsky hierarchy, grammar is divided into 4 types as follows:**- Type 0 is known as unrestricted grammar.
- Type 1 is known as context-sensitive grammar.
- Type 2 is known as a context-free grammar.
- Type 3 Regular Grammar.

## What is automata and its example?

**Automatic photo printing machines, artificial card punching machine, human detection and reorganization machine**etc. are the real time examples of automata. Under the computer science branch the term ‘Automata’ means ‘Discrete Automata’ and it is defined as; Model of Discrete Automata.

## What is the use of automata?

Automata are widely used for

**modelling and verification of software, distributed systems, real-time systems, or structured data**. They have been equipped with features to model time and probabilities as well.## What are the 3 types of grammar?

**Kinds of grammar.**

- prescriptive.
- descriptive.
- transformational-generative.

## What are the 7 types of grammar?

**More Grammar to Explore**

- Case grammar.
- Cognitive grammar.
- Construction grammar.
- Generative grammar.
- Lexical-functional grammar (LFG)
- Mental grammar.
- Theoretical grammar.
- Transformational grammar.

## What is symbol in automata theory?

Symbol: A symbol is

**a user-defined entity**. Alphabet: An alphabet is a finite set of symbols denoted by Σ in automata. Alphabets are a set of symbols used to construct a language.## What are the different types of Turing machine?

- Multiple track Turing Machine: …
- Two-way infinite Tape Turing Machine: …
- Multi-tape Turing Machine: …
- Multi-tape Multi-head Turing Machine: …
- Multi-dimensional Tape Turing Machine: …
- Multi-head Turing Machine: …
- Non-deterministic Turing Machine:

## What is DFA and NFA?

**DFA stands for Deterministic Finite Automata.**

**NFA stands for Nondeterministic Finite Automata**. For each symbolic representation of the alphabet, there is only one state transition in DFA. No need to specify how does the NFA react according to some symbol. DFA cannot use Empty String transition.

## What is automata theory language?

In automata theory, a formal language is

**a set of strings of symbols drawn from a finite alphabet**. A formal language can be specified either by a set of rules (such as regular expressions or a context-free grammar) that generates the language, or by a formal machine that accepts (recognizes) the language.## What is an automata machine?

An automaton (/ɔːˈtɒmətən/; plural: automata or automatons) is

**a relatively self-operating machine, or control mechanism designed to automatically follow a sequence of operations, or respond to predetermined instructions**.## Why DFA is faster than NFA?

DFA will be fast compared to NFA, since

**it has only one outgoing edge & there will be no ambiguity**. But in case of NFA we have to check all possible cases & that surely takes time.## Which is better NFA or DFA?

NO ,NFA and DFA are of same power. We can convert each NFA into its equivalent DFA , By an algorithm called subset construction algorithm. We can create subsets of sates of NFA by this algorithm .

## What is DFA example?

The finite automata are called deterministic finite automata if the machine is read an input string one symbol at a time. In DFA, there is only one path for specific input from the current state to the next state.

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Transition Table:

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Transition Table:

Present State | Next state for Input 0 | Next State of Input 1 |
---|---|---|

→q0 | q0 | q1 |

q1 | q2 | q1 |

*q2 | q2 | q2 |

## Why NFA is non-deterministic?

NFA stands for non-deterministic finite automata.

**It is easy to construct an NFA when compared to DFA for a given regular language**. The finite automata are called NFA when there exist many paths for specific input from the current state to the next state. Each NFA can be translated into DFA but every NFA is Non DFA.## Can DFA have dead state?

Note:

**Dead state may be required in DFA**. Dead state is not required in NFA.## What are the applications of DFA?

DFA uses include

**protocol analysis, text parsing, video game character behavior, security analysis, CPU control units, natural language processing, and speech recognition**.## Is every DFA is NFA?

In particular,

**every DFA is also an NFA**. Sometimes the term NFA is used in a narrower sense, referring to an NFA that is not a DFA, but not in this article. Using the subset construction algorithm, each NFA can be translated to an equivalent DFA; i.e., a DFA recognizing the same formal language.## What is DFA full form?

**Deterministic finite automaton**– Wikipedia.

## Can we convert DFA to NFA?

As, far as I know, there is no unique solution for a conversion from DFA to NFA. Therefore, your answer is not challengeable. Although, you can try and make the tightest possible state diagram. Whereas, when you are converting an NFA to DFA , you will find a unique solution.

## What is the difference between NFA and e NFA?

Non-deterministic Finite Automata (NFA) is a finite automata having zero, one or more than one moves from a given state on a given input symbol.

**Epsilon NFA is the NFA which contains epsilon move(s)/Null move(s)**.