Given:

Which statement on line 1 enables this code to compile?

• 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;

Correct Answer: A

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Given:

Which three classes successfully override printOne()? (Choose three.)

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

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Given this enum declaration:

Examine this code:
System.out.println(Alphabet.getFirstLetter());
What code should be written at line 3 to make this code print A?

• A.static String getFirstLetter() { return A.toString(); }
• B.final String getFirstLetter() { return A.toString(); }
• C.static String getFirstLetter() { return Alphabet.values()[1].toString(); }
• D.String getFirstLetter() { return A.toString(); }

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Given:

It is required that if p instanceof Pair then p.isValid() returns true.
Which is the smallest set of visibility changes to insure this requirement is met?

• A.isValid must be public.
• B.left, right, setLeft, and setRight must be private.
• C.setLeft and setRight must be protected.
• D.left and right must be private.

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Given the code fragment:

What is the result?

• A.false true true
• B.true false false
• C.false false true
• D.false true false

Correct Answer: D

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