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UGC-NET | UGC NET CS 2017 Jan – III | Question 62

  • Last Updated : 02 Apr, 2018

Which of the following pairs have different expressive power?
(A) Single-tape-turing machine and multi-dimensional turing machine.
(B) Multi-tape turing machine and multi-dimensional turing machine.
(C) Deterministic push down automata and non-deterministic pushdown automata.
(D) Deterministic finite automata and Non-deterministic finite automata


Answer: (C)

Explanation:

  1. Single-tape-turing machine and multi-dimensional turing machine have same expressive power.
  2. Multi-tape turing machine and multi-dimensional turing machine have same expressive power.
  3. Deterministic push down auto-mata and non-deterministic push-down automata have different expressive power(n-pda is more expressive)
  4. Deterministic finite automata and Non-deterministic finite automata have same expressive power.

    So, option (C) is correct.


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