## What is automata theory and formal languages?

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 two major theories of language origin?**

The ‘pooh-pooh theory’ holds that speech originated from spontaneous human cries and exclamations; the ‘yo-he-ho theory’ suggests that language developed from grunts and gasps evoked by physical exertion; while the ‘sing-song theory’ claims that speech arose from primitive ritual chants.

**What is automata theory used for?**

The major objective of automata theory is to develop methods by which computer scientists can describe and analyze the dynamic behavior of discrete systems, in which signals are sampled periodically.

### What is Chomsky hierarchy in automata theory?

Chomsky Hierarchy represents the class of languages that are accepted by the different machine. The category of language in Chomsky’s Hierarchy is as given below: Type 0 known as Unrestricted Grammar. Type 1 known as Context Sensitive Grammar.

**What is automata theory with example?**

Automata theory is the study of abstract machines and automata, as well as the computational problems that can be solved using them. It is a theory in theoretical computer science. The word automata comes from the Greek word αὐτόματος, which means “self-acting, self-willed, self-moving”.

**How people use theory 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.

## Why do we need to study automata theory and formal languages?

Formal Languages and Automat Theory deals with the concepts of automata, formal languages, grammar, algorithms, computability, decidability, and complexity. The reasons to study Formal Languages and Automat Theory are Automata Theory provides a simple, elegant view of the complex machine that we call a computer.

**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 |

**Where is automata used in real life?**

Automatic photo printing machines, artificial card punching machine, human detection and reorganization machine etc. are the real time examples of automata.

### What are the theories of human language?

The Bow-Wow Theory According to this theory, language began when our ancestors started imitating the natural sounds around them. The first speech was onomatopoeic—marked by echoic words such as moo, meow, splash, cuckoo, and bang.

**What is the importance of studying theory of automata?**

Through automata, computer scientists are able to understand how machines compute functions and solve problems and more importantly, what it means for a function to be defined as computable or for a question to be described as decidable .

**What is automata in theory of automata?**

It is a theory in theoretical computer science. The word automata comes from the Greek word αὐτόματος, which means “self-acting, self-willed, self-moving”. An automaton (Automata in plural) is an abstract self-propelled computing device which follows a predetermined sequence of operations automatically.