A.The compilation fails.

B.Only reader1 has been closed.

C.All three readers are still open.

D.All three readers have been closed.

A.Fox class must implement either Forest or Town interfaces, but not both.

B.The inhabit method implementation from the first interface that Fox implements will take precedence.

C.Fox class must provide implementation for the inhabit method.

D.Fox class does not have to override inhabit method, so long as it does not try to call it.

E.Fox class does not have to override the inhabit method if Forest and Town provide compatible implementations.

A.Keys: 0 Values: 0 Map: 0

B.Keys: 4 Values: 4 Map: 4

C.Keys: 4 Values: 4 Map: 0

D.The compilation fails.

E.Keys: 0 Values: 0 Map:

A..map(Employee::getLocality)
.distinct()
.count();

B..map(e > e.getLocality())
.collect(Collectors.toSet())
.count();

C.map(e > e.getLocality())
.count();

D..filter(Employee::getLocality)
.distinct()
.count();

A.System.in is the standard input stream. The stream is already open.

B.System.in cannot reassign the other stream.

C.System.out is an instance of java.io.OutputStream by default.

D.System.out is the standard output stream. The stream is open only when System.out is called.