Free Oracle 1Z1-816 Exam Dumps Questions & Answers

Given:

Which two are correct? (Choose two.)

• A.Option D
• B.Option A
• C.Option C
• D.Option B

Which two statements independently compile? (Choose two.)

• A.List<? super Short> list = new ArrayList<Number>();
• B.List<? super Number> list = new ArrayList<Integer>();
• C.List<? extends Number> list = new ArrayList<Object>();
• D.List<? super Float> list = new ArrayList<Double>();
• E.List<? extends Number> list = new ArrayList<Byte>();

Given:

Which three actions implement Java SE security guidelines? (Choose three.)

• A.Change line 4 to this.names = names.clone();.
• B.Change line 6 to public synchronized String[] getNames() {.
• C.Change line 7 to return names.clone();.
• D.Change the getNames() method name to get$Names().
• E.Change line 2 to protected volatile String[] names;.
• F.Change line 2 to private final String[] names;.
• G.Change line 3 to private Secret(String[] names) {.

Which interface in the java.util.function package will return a void return type?

• A.Function
• B.Consumer
• C.Supplier
• D.Predicate

Given:

What is required to make the Foo class thread safe?

• A.Replace the lock constructor call with new ReentrantLock (true).
• B.Make the declaration of lock static.
• C.Move the declaration of lock inside the foo method.
• D.No change is required.