## What is language in theory of automata?

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 are the different types of languages in automata?**

Chomsky Classification of Grammars

Grammar Type | Grammar Accepted | Language Accepted |
---|---|---|

Type 0 | Unrestricted grammar | Recursively enumerable language |

Type 1 | Context-sensitive grammar | Context-sensitive language |

Type 2 | Context-free grammar | Context-free language |

Type 3 | Regular grammar | Regular language |

**What is the role of automata in real world?**

Modern applications of automata theory go far beyond compiler techniques or hardware verification. 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.

### Is automata theory useful for NLP?

Natural language processing (NLP) comprises a number of tasks that deal with the processing of natural language through computers. The theory of automata plays a significant role in providing solutions of many problems in natural language processing.

**What is automata and formal languages?**

Formal Languages and Automata theory presents the theoretical aspects of computer science, and helps define infinite languages in finite ways; construct algorithms for related problems and decide whether a string is in language or not.

**What are different types of languages and list the machines that recognize the languages?**

Broadly the computer language can be classified into three categories assembly language, machine language, and high-level language. The machine language is considered as oldest computer language among all three. In machine language, the input is directly given as binary input which is processed by the machine.

## Which language is accepted by Turing machine?

recursively ennumerable

Explanation: The language accepted by Turing machines are called recursively ennumerable (RE), and the subset of RE languages that are accepted by a turing machine that always halts are called recursive. Explanation: We can refer to languages as ‘recursive’ and problems as ‘decidable’.

**How many types of automata are there?**

There are four major families of automaton : Finite-state machine. Pushdown automata. Linear-bounded automata.

**What is automata theory used for?**

Each model in automata theory plays important roles in several applied areas. Finite automata are used in text processing, compilers, and hardware design. Context-free grammar (CFGs) are used in programming languages and artificial intelligence. Originally, CFGs were used in the study of the human languages.