Which code fragment compiles?

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

Correct Answer: D

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Given:

What is the result?

• A.Dr. Who
• B.Dr. Null
• C.An exception is thrown at runtime.
• D.null

Correct Answer: D

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Which two are successful examples of autoboxing? (Choose two.)

• A.Long c = 23L;
• B.String a = "A";
• C.Float f = 6.0;
• D.Double d = 4;
• E.Float g = Float.valueOf(null);
• F.Integer e = 5;

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Given:

What is the result?

• A.Orange Juice
• B.The compilation fails.
• C.Orange Juice Apple Pie Lemmon Ice Raspberry Tart
• D.The program prints nothing.

Correct Answer: C

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Given:

Which statement is equivalent to line 1?

• A.double totalSalary = list.stream().map(e -> e.getSalary() * ratio).reduce (bo).ifPresent (p -> p.doubleValue());
• B.double totalSalary = list.stream().mapToDouble(e -> e.getSalary() * ratio).sum;
• C.double totalSalary = list.stream().map(Employee::getSalary * ratio).reduce (bo).orElse(0.0);
• D.double totalSalary = list.stream().mapToDouble(e -> e.getSalary() * ratio).reduce(starts, bo);

Correct Answer: C

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