Q7

MCQ1 mark, −0.25

Consider the set $\Sigma^*$ of all strings over the alphabet $\Sigma = \{0, 1\}$ . $\Sigma^*$ with the concatenation operator for strings

(A)

does not form a group

(B)

forms a non-commutative group

(C)

does not have a right identity element

(D)

forms a group if the empty string is removed from $\Sigma^*$

Loading…