What is a regular language?

Understanding Regular Languages and CFGs

Quiz
•
Computers
•
University
•
Easy

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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A regular language is a language that cannot be expressed using regular expressions.
A regular language is a language that can only be recognized by a context-free grammar.
A regular language is a language that requires a pushdown automaton for recognition.
A regular language is a language that can be represented by a regular expression and recognized by a finite automaton.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Define context-free grammar (CFG).
A context-free grammar consists only of terminal symbols.
A context-free grammar (CFG) is a formal grammar that generates a context-free language, consisting of a set of production rules that describe how to form strings from the language's lexicon
A context-free grammar is used exclusively for natural language processing.
A context-free grammar is a type of programming language.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain the role of production rules in a grammar.
Production rules are only applicable in programming languages, not natural languages.
Production rules are the fundamental building blocks of a grammar that specify how to generate strings in a language.
Production rules are a type of punctuation used in writing.
Production rules are used to define the meaning of words in a language.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Identify the start symbol in a given CFG.
A
X
P
S
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are terminal and non-terminal symbols?
Non-terminal symbols represent actual data values.
Terminal symbols are only used in programming languages.
Terminal symbols are the actual content symbols, while non-terminal symbols are placeholders for patterns of terminal symbols.
Both terminal and non-terminal symbols are interchangeable.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Is the language defined by "a^n b^n c^n" context-free? Why or why not?
No, the language defined by anbncn is not context-free.
Yes, the language defined by anbncn is context-free.
The language is context-free because it can be generated by a context-free grammar.
The language defined by anbncn is regular.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a syntax tree?
A syntax tree is a kind of maple variant.
A syntax tree is a tree representation of the syntactic structure of input sentences in respect to form.
A syntax tree is a list of all variables in the code.
A syntax tree defines a sentence's functionality
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does a grammar verify if a string belongs to a language?
A string belongs to a language if it contains at least one vowel.
A string belongs to a language if it is written in uppercase letters.
A string belongs to a language if it is longer than the grammar's rules.
A string belongs to a language if it can be generated by the grammar's production rules.
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