Given:

What is the result?

• A.NullPointerException is thrown at line 4.
• B.NullPointerException is thrown at line 10.
• C.A compilation error occurs.
• D.Hello

Correct Answer: D

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Given:

Which three are true? (Choose three.)

• A.b1.foo(c) prints Hello world!
• B.f2.foo(c) prints Ola Mundo!
• C.f1.foo(c) prints Hello world!
• D.f2.foo(c) prints Bonjour le monde!
• E.b1.foo(c) prints Bonjour le monde!
• F.b1.foo(c) prints Ola Mundo!
• G.f1.foo(c) prints Bonjour le monde!
• H.f1.foo(c) prints Ola Mundo!
• I.f2.foo(c) prints Hello world!

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Given:

What is the result?

• A.NullPointerException is thrown at line 4.
• B.NullPointerException is thrown at line 10.
• C.A compilation error occurs.
• D.Hello

Correct Answer: D

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Given:

What is required to make the Foo class thread safe?

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

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Given:

Which three classes successfully override showFirst ()?
A)

B)

C)

D)

E)

F)

• A.Option E
• B.Option F
• C.Option D
• D.Option A
• E.Option B
• F.Option C

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