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Welcome to the Push Down Automata MCQs Page

Dive deep into the fascinating world of Push Down Automata with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Push Down Automata, a crucial aspect of Formal Languages and Automata Theory. In this section, you will encounter a diverse range of MCQs that cover various aspects of Push Down Automata, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Formal Languages and Automata Theory.

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Check out the MCQs below to embark on an enriching journey through Push Down Automata. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Formal Languages and Automata Theory.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Push Down Automata. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Push Down Automata MCQs | Page 6 of 8

Q51.
Let T={p, q, r, s, t}. The number of strings in S* of length 4 such that no symbols can be repeated.
Discuss
Answer: (b).625
Discuss
Answer: (a).Regular<CFL<CSL<Unrestricted
Q53.
A language is accepted by a push down automata if it is:
Discuss
Answer: (c).both a and b
Q54.
Which of the following is an incorrect regular expression identity?
Discuss
Answer: (b).eR=e
Q55.
Which of the following strings do not belong the given regular expression?
(a)*(a+cba)
Discuss
Answer: (d).acbacba
Q56.
Which of the following regular expression allows strings on {a,b}* with length n where n is a multiple of 4.
Discuss
Answer: (c).((a+b)(a+b)(a+b)(a+b))*
Q57.
Which of the following strings is not generated by the given grammar:
S->SaSbS|e
Discuss
Answer: (d).None of the mentioned
Q58.
abb*c denotes which of the following?
Discuss
Answer: (b).{abnc|n=1}
Q59.
The following denotion belongs to which type of language:
G=(V, T, P, S)
Discuss
Answer: (b).Context free grammar
Q60.
Context free grammar is called Type 2 grammar because of ______________ hierarchy.
Discuss
Answer: (c).Chomsky
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