Given:

You wants to make the reduction operation parallelized.
Which two modifications will accomplish this?

• A.Replace line 1with int sum = numbers. ParallelStream ( ). Reduce (0, (n, m ) -> n + m);
• B.Replace line 1 with int sum = numbers. Stream (). Interate (0, a -> a+1. Reduce (0, (n m) -> n+m);
• C.Replace line 1with int sum = number. Stream ( ) . flatMap (a -> a) .reduce (0, (n, m) -> n +m );
• D.Replace line 1 with int sum = numbers. Parallel ( ). Stream ( ). Reduce (0, (n, m ) -> n + m);
• E.Replace line 1with int sum = number.stream. parallel ( ). Reduce (0, (n, m) -> n + m);

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Given:

This code results in a compilation error.
Which code should be inserted on line 1 for a successful compilation?

• A.Consumer consumer = msg -> { return System.out.print(msg); };
• B.Consumer consumer = var arg > {System.out.print(arg);};
• C.Consumer consumer = (String args) > System.out.print(args);
• D.Consumer consumer = System.out::print;

Correct Answer: D

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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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Given:
public class X {
}
and
public final class Y extends X {
}
What is the result of compiling these two classes?

• A.The compilation fails because there is no zero args constructor defined in class X.
• B.The compilation fails because either class X or class Y needs to implement the toString() method.
• C.The compilation fails because a final class cannot extend another class.
• D.The compilation succeeds.

Correct Answer: B

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Which two are functional interfaces? (Choose two.)

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

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