CS-6205 - Automata Theory and Formal Language oed answer key

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Awesome StudentQuestion • Automata Theory and Formal Language

A __________ of a derivation is a tree in which each internal node is labeled with a nonterminal.

Answer

parse tree

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Awesome StudentQuestion • Automata Theory and Formal Language

A good regular expression for any valid real number using engineering notation is ______________.

Answer

[0-9]+[0-9]*[(E|e)[0-9]+]

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Awesome StudentQuestion • Automata Theory and Formal Language

An example string w of a language L characterized by equal number of As and Bs is _______________.

Answer

ABBBAA

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Awesome StudentQuestion • Automata Theory and Formal Language

A may or may not read an input symbol, but it has to read the top of the stack in every transition.

Answer

PDA

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Awesome StudentQuestion • Automata Theory and Formal Language

Checking whether there is a matching parenthesis in a computer code can be done by a ______________.

Answer

context-free grammar

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Awesome StudentQuestion • Automata Theory and Formal Language

Noam Chomsky gave a mathematical model in _______ which is effective for writing computer languages.

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Awesome StudentQuestion • Automata Theory and Formal Language

Every context free grammar can be transformed into an equvalent non deterministic push down automata.

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Awesome StudentQuestion • Automata Theory and Formal Language

According to the 5-tuple representation i.e. FA= {Q, ∑, δ, q, F} Statement 1: q ϵ Q'; Statement 2: FϵQ

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Awesome StudentQuestion • Automata Theory and Formal Language

A right-most derivation of a sentential form is one in which rules transforming the are always applied.

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Awesome StudentQuestion • Automata Theory and Formal Language

For every pair of regular expressions R and S, the languages denoted by R(SR)* and (RS)*R are the same.

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Awesome StudentQuestion • Automata Theory and Formal Language

The number of elements in the set for the Language L={xϵ(∑r) *|length if x is at most 2} and ∑={0,1} is

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Awesome StudentQuestion • Automata Theory and Formal Language

A DFA can remember a finite amount of information, but a can remember an infinite amount of information.

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Awesome StudentQuestion • Automata Theory and Formal Language

If we can successfully and ly stimulate a TM with storage by two standard TMs, then ______________________

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Awesome StudentQuestion • Automata Theory and Formal Language

The _____ of two sets A and B is the set containing those elements which are elements of A or elements of B.

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Awesome StudentQuestion • Automata Theory and Formal Language

The cardinality of the union of two disjoint sets is less than the sum of the cardinality of the given sets.

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Awesome StudentQuestion • Automata Theory and Formal Language

A string is accepted by a, iff the DFA/NDFA starting at the initial state ends in an after reading the string.

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Awesome StudentQuestion • Automata Theory and Formal Language

The commutativity property of set operations states that the union of any set with same set is the set itself.

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Awesome StudentQuestion • Automata Theory and Formal Language

Which of the following Set Operations produces the set that contains everything that is in Set A and in Set B?

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Awesome StudentQuestion • Automata Theory and Formal Language

For the given Regular expression, the minimum number of terminals required to derive its grammar (011+1)*(01)* is

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