A.A and B are functionally equivalent.

B.A, because it sends exactly the value of user provided by the calling code.

C.A, because it is unnecessary to enclose identifiers in quotes.

D.B, because all values provided by the calling code should be enquoted.

E.B, because enquoting values provided by the calling code prevents SQL injection.

A.null

B.Joe Bloggs

C.The compilation fails due to an error in line 1.

D.p1

A.Function<Integer, Integer> f = n > n * 2;

B.Function<Integer> f = n > n * 2;

C.Function<int> f = n > n * 2;

D.Function<int, int> f = n > n * 2;

E.Function f = n > n * 2;

A.UnaryOperator<Interger >uo = x -> { return x * 3; };

B.UnaryOperator<Interger >uo = (int x) -> x * 3;

C.UnaryOperator<Interger > uo = (var x ) -> (x * 3);

D.UnaryOperator<Interger >uo = var x -> { return x 3 ; };

A.watermelonorangelemongrapeapricotapple

B.nothing

C.appleapricotgrapelemonorangewatermelon

D.appleorangegrapelemonapricotwatermelon