Java SE 11 Programmer II: 1Z0-816

Given:

Examine these requirements:

Eliminate code duplication.

Keep constant the number of methods other classes may implement from this interface.

Which method can be added to meet these requirements?

A. Option A

B. Option B

C. Option C

D. Option D

Given:

List list1 = new ArrayList<>();

list1.add("A");

list1.add("B");

List list2 = List.copyOf(list1);

list2.add("C");

List> list3 = List.of(list1, list2);

System.out.println(list3);

What is the result?

A. [[A, B],[A, B]]

B. An exception is thrown at run time.

C. [[A, B], [A, B, C]]

D. [[A, B, C], [A, B, C]]

Consider this method declaration:

A) “SET SESSION AUTHORIZATION “ + user

B) “SET SESSION AUTHORIZATION “ + stmt.enquoteIdentifier(user)

Is A or B the correct replacement for and why?

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

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

C. A and B are functionally equivalent.

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

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