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State true or false:\nStatement: Using a two track tape, we can use a semi infinite tape to simulate an infinte tape.

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State true or false:\nStatement: Using a two track tape, we can use a semi infinite tape to simulate an infinte tape.

(a) true

(b) false

This question was addressed to me during a job interview.

This interesting question is from Multistack Machines, Counter Machines topic in portion Introduction to Turing Machines of Automata Theory

1 Answer

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Correct answer is (a) true

The explanation: A TM with a semi-infinite tape means that there are no cells to the left of the initial head position. A TM with a semi infinite tape simulates a TM with an infinite tape by using a two-track tape.

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