Theory of Computation MCQ
The Theory of Computation is a fundamental area of computer science that explores the principles of computation, automata, languages, and algorithms. Our collection of MCQs (Multiple Choice Questions) on the Theory of Computation helps learners and professionals assess their understanding of key topics, including finite automata, regular languages, Turing machines, and complexity theory. Whether you are studying for exams or preparing for technical interviews, these MCQs provide a thorough review of theoretical computer science concepts, aiding in the development of problem-solving skills and the deepening of theoretical knowledge.
Q1. Which of the following is the main study area of Theory of Computation?
A. Programming languages
B. Algorithms
C. Formal languages, automata, and computation
D. Computer networks
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Q2. Which automaton recognizes regular languages?
A. Pushdown Automaton
B. Finite Automaton
C. Turing Machine
D. Linear Bounded Automaton
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Q3. Which automaton recognizes context-free languages?
A. Turing Machine
B. Pushdown Automaton
C. Finite Automaton
D. DFA only
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Q4. Which machine can solve all problems that are algorithmically solvable?
A. Finite Automaton
B. Pushdown Automaton
C. Turing Machine
D. Mealy Machine
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Q5. Which of the following is NOT a formal language type?
A. Regular
B. Context-Free
C. Assembly
D. Context-Sensitive
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Q6. Which is an example of a regular expression?
A. a*b
B. a+b?
C. Both A and B
D. None
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Q7. What is the main difference between DFA and NFA?
A. DFA has one start state, NFA has multiple
B. DFA has one transition per symbol per state, NFA can have multiple
C. DFA recognizes more languages than NFA
D. There is no difference
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Q8. Which machine has memory in the form of a stack?
A. DFA
B. PDA
C. Turing Machine
D. Mealy Machine
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Q9. Which problem is undecidable?
A. Finding maximum of array
B. Halting Problem
C. Sorting numbers
D. Finding factorial
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Q10. Which language type is more powerful than context-free but less than Turing-recognizable?
A. Regular
B. Context-Free
C. Context-Sensitive
D. Unrestricted
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Q11. Which diagram represents state transitions?
A. Flowchart
B. State Diagram
C. ER Diagram
D. Data Flow Diagram
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Q12. Which of the following is a property of regular languages?
A. Closed under union
B. Closed under concatenation
C. Closed under Kleene star
D. All of the above
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Q13. Which is a type of Turing Machine?
A. Deterministic
B. Non-deterministic
C. Both
D. None
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Q14. Which is an example of context-free language?
A. Balanced parentheses
B. All binary strings
C. a^n b^n c^n d^n e^n
D. None
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Q15. Which automaton can recognize the language {a^n b^n | n β₯ 0}?
A. DFA
B. NFA
C. PDA
D. Turing Machine
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Q16. Which of the following is true for NFA and DFA?
A. NFA is strictly more powerful than DFA
B. DFA is strictly more powerful than NFA
C. DFA and NFA recognize the same class of languages
D. NFA recognizes more languages than DFA
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Q17. Which machine uses unlimited tape as memory?
A. DFA
B. PDA
C. Turing Machine
D. Mealy Machine
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Q18. Which language class is also known as recursively enumerable?
A. Regular
B. Context-Free
C. Context-Sensitive
D. Turing-Recognizable
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Q19. Which of the following represents a formal grammar?
A. G = (N, T, P, S)
B. G = (X, Y, Z)
C. G = (A, B, C, D)
D. None
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