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Introduction to Formal Languages

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Questions and Answers

Which of the following sets is an example of a finite language?

{a, b, aa, bb, ab}

{car, truck, goose} (correct)

{a, aa, abba, bbba} (correct)

{1, 11, 111, 1111, 11111, …}

Which of the following correctly identifies an infinite language?

{a, aa, abba, bbba}

{1, 11, 111, 1111, 11111, …} (correct)

{car, truck, goose}

{cat, dog, fish}

What distinguishes a formal language from other types of languages?

It consists only of programming code.

It must include at least one vowel.

It is always composed of numbers.

It can have both finite and infinite sets of strings. (correct)

Which of the following sets does not represent a formal language as defined?

<p>The set of all English words</p> Signup and view all the answers

Which of the following could be an example of a string in a formal language?

<p>aaaa</p> Signup and view all the answers

Study Notes

Formal Languages

A formal language is a set of strings.
Examples of formal languages:
- L1 = {a, aa, abba, bbba}
- L2 = {car, truck, goose}
- L3 = {1, 11, 111, 1111, 11111, …}
Languages can be either finite or infinite.

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Description

Explore the fundamentals of formal languages, which are defined as sets of strings. This quiz covers examples of both finite and infinite languages, including specific subsets and their characteristics. Test your understanding of these foundational concepts in computer science.