From CD in Simon Roberts book: Q)Which of the following lines of code, considered individually, compile(s) without error? Choose all correct options. A) int i=1; int j = &simi; B)int i=1; int j = !i; C) boolean b = true; boolean c = &simb; D) boolean b = true; boolean c = !b; Correct selection is: A, D explain: The &sim operator performs bitwise inversion on integral types; it may not be applied to boolean data. The ! operator inverts boolean values; it may not be applied to integral types. I do not understand what is a &sim operator. Helps? Thank you.