Question

Question 6

Consider the Turing Machine (TM) T (over the input alphabet Σ = {a, b}) given below.

(b,b,R) (a.a, R) (b.b,,R) (A,A,L) 1 Start 2 نيا 4 Halt (a, a,R) (a, a,R) (b,b,R) (A,A,R) Trace the execution of the TM on a few strings of as and bs so that you can see how it works and answer the following questions. 6.1. What is the shortest word that would be accepted by T? (2) 6.2. What is accept(T)? (2) 6.3. What is reject(T)? (2)

Answer 1

6.1

The shortest word that is accepted by Turing machine is "ab"

6.2

Accept(T) is ab*

6.3

Reject(T) is ab*a+b*

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