Given: ∑= {a, b} L= {xϵ∑*|x is a string combination} ∑4 represents which among the following? ans. {aaaa, abab, ε, abaa, aabb} {aa, ab, ba, bb} All of the mentioned {aaa, aab, aba, bbb}

Given: ∑= {a, b}L= {xϵ∑*|x is a string combination}∑4 represents which among the following?

Write the Boolean expression of the combination logic.

S->(S) | aA | epsilon A-> A+B | a B-> B *C | b C -> c Options : T= ( ,a,b,),+,* T= ( ,a,b,),+,*,c T= a,b,c None of the above mentioned

or each of the following languages over the alphabet Σ = {a, b, c} specified by the regular expressions (a)–(c),provide two strings in Σ∗ that are members and two strings in Σ∗ that are not members of the language (fourstrings each).(a) ab + a(b) ((bc)∗ + b)a(c) (a + ab + abc)∗(b + c)

What assignments to x and y will make the following expression true?(( x && y) || !x )Group of answer choicesx = true, y = falsex = false, y = falsex = true, y = truex = false, y = true