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DFA is a theory of computation, a branch of theoretical computer science. Do you understand DFA? Take this DFA quiz to see how well do you know. Here, in this quiz, we have a few basic questions about DFA that will help you test your knowledge on this topic and add some extra information. Take up the quiz, and see how much you score. Try for a perfect score on this quiz. If you like the quiz, do share the quiz with other people in computer field.
Questions and Answers
1.
What does DFA stand for?
A.
Deterministic final automata
B.
Determined finite automata
C.
Deterministic finite automata
D.
Deterministic finite automatic
Correct Answer
C. Deterministic finite automata
Explanation DFA stands for deterministic finite automata. A deterministic finite automaton is a mathematical model used to represent a finite state machine. It consists of a set of states, a set of input symbols, a transition function, a start state, and a set of final states. The term "deterministic" means that for every given state and input symbol, there is only one possible transition to the next state. The term "finite" indicates that the number of states in the automaton is finite. Therefore, the correct answer is "deterministic finite automata."
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2.
It refers to the uniqueness of the computation.
A.
Determined
B.
Deterministic
C.
Feasibility
D.
Correctness
Correct Answer
B. Deterministic
Explanation Deterministic means that the outcome or result of a computation is completely determined by its inputs and the sequence of steps followed in the computation. In other words, given the same inputs and following the same steps, the computation will always produce the same result. This term emphasizes the predictability and reliability of the computation, as it ensures that the same inputs will always yield the same outputs. Therefore, the given answer "deterministic" accurately captures the concept of uniqueness in computation.
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3.
____ and ____ were among the first researchers to introduce a concept similar to finite automaton in 1943
A.
Mckenzie and Feets
B.
McCullen and Pitts
C.
McCulloch and Fitz
D.
McCulloch and Pitts
Correct Answer
D. McCulloch and Pitts
Explanation McCulloch and Pitts were among the first researchers to introduce a concept similar to finite automaton in 1943.
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4.
A deterministic finite automaton without accept states and without a starting state is known as a
A.
Transition system
B.
Transmission system
C.
Transparent system
D.
Transport system
Correct Answer
A. Transition system
Explanation A deterministic finite automaton without accept states and without a starting state is known as a transition system. This term refers to a computational model that consists of a set of states and a set of transitions between these states. In this case, the automaton does not have any accept states, meaning it does not recognize any specific input pattern as valid. Additionally, it does not have a starting state, indicating that there is no initial state from which the computation begins. Therefore, the term "transition system" accurately describes this type of automaton.
Explanation The given answer lists ten closure properties: union, intersection, concatenation, negation, Kleene closure, reversal, init, Quotient, substitution, and homomorphism. These closure properties are operations that can be applied to sets or languages in formal language theory. Each property has its own specific definition and rules for combining or transforming sets or languages. These closure properties are fundamental concepts in formal language theory and are used to study and analyze various aspects of languages and automata.
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6.
In the _____ mode, an input string is provided, which the automaton can read from left to right.
A.
Take
B.
Accept
C.
Trance
D.
Enter
Correct Answer
B. Accept
Explanation In the "accept" mode, an input string is provided to the automaton, which it can read from left to right. This suggests that the automaton is designed to process and analyze input strings in a sequential manner, starting from the leftmost character and moving towards the right. The "accept" mode implies that the automaton is capable of accepting or recognizing valid input strings based on its internal rules or patterns.
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7.
The ___ mode is similar to the accepting mode, except rather than validating an input string, its goal is to produce a list of all the strings in the language
A.
Get
B.
Generate
C.
Create
D.
Validate
Correct Answer
B. Generate
Explanation The correct answer is "generate". In this context, the mode being referred to aims to produce a list of all the strings in a language, rather than just validating a single input string. The word "generate" accurately describes the action of creating or producing a list of strings.
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8.
Given that regular languages are, in general, infinite, automata in the generating mode tend to be more of a ______ construct.
A.
Terrestrial
B.
Theoretical
C.
Thermal
D.
Trivial
Correct Answer
B. Theoretical
Explanation Automata in the generating mode are more of a theoretical construct because regular languages, which they are designed to generate, are infinite in nature. Theoretical here refers to the abstract and conceptual nature of automata and regular languages, as opposed to being practical or physical like terrestrial or thermal. Trivial, on the other hand, means something that is simple or unimportant, which does not accurately describe the complexity and significance of automata in generating regular languages.
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9.
DFAs can be reduced to a ______ form.
A.
Canonical
B.
Smaller
C.
Specified
D.
General
Correct Answer
A. Canonical
Explanation DFAs can be reduced to a canonical form. A canonical form refers to a standard or unique representation that is independent of any particular implementation or interpretation. In the context of DFAs (Deterministic Finite Automata), reducing them to a canonical form means transforming them into an equivalent DFA that has a standardized representation. This allows for easier comparison, analysis, and understanding of different DFAs, as they all follow the same standardized structure. Therefore, the correct answer is "canonical."
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10.
Closure properties of DFA can also be used in ___.
A.
NPA
B.
NFA
C.
NBA
D.
NHA
Correct Answer
B. NFA
Explanation The closure properties of DFA can also be used in NFA. The closure properties refer to the ability to perform certain operations on languages recognized by automata. These operations include union, concatenation, and complementation. Since NFA is a type of automaton that recognizes languages, the closure properties that apply to DFA can also be applied to NFA. This means that we can use these properties to perform operations such as union, concatenation, and complementation on languages recognized by NFA.
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