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If T1 and T2 are two turing machines. The composite can be represented using the expression:(a) T1T2(b) T1 U T2(c) T1 X T2(d) None of the mentionedThis question was addressed to me during an interview.My question is based upon Introduction to Turing Machines topic in chapter Introduction to Turing Machines of Automata Theory

Answer»

Right choice is (a) T1T2

Easiest explanation: If T1 and T2 are TMs, with disjoint sets of non halting states and transition FUNCTION D1 and d2, RESPECTIVELY, we write T1T2to denote this composite TM.



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