Given:

Which two interfaces can be used in lambda expressions? (Choose two.)

• A.MyInterface5
• B.MyInterface2
• C.MyInterface4
• D.MyInterface3
• E.MyInterface1

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Given:

Which annotation should be used to remove warnings from compilation?

• A.@SuppressWarnings on the main and print methods
• B.@SuppressWarnings("unchecked") on main and @SafeVarargs on the print method
• C.@SuppressWarnings("rawtypes") on main and @SafeVarargs on the print method
• D.@SuppressWarnings("all") on the main and print methods

Correct Answer: B

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Given:

What will secure this code from a potential Denial of Service condition?

• A.Before Line 1, check the size of dataFiles to make sure it does not exceed a threshold.
• B.On Line 3, enclose processData(dataReader) with try with resources.
• C.After Line 4, add indexReader.close().
• D.After Line 3, add dataReader.close().
• E.On Line 1, use try with resources when opening each dataReader.

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var numbers = List.of(0,1,2,3,4,5,6,7,8,9);
You want to calculate the average of numbers. Which two codes will accomplish this? (Choose two.)

• A.double avg = numbers.stream().parallel().averagingDouble(a > a);
• B.double avg = numbers.parallelStream().mapToInt (m > m).average().getAsDouble ();
• C.double avg = numbers.stream().mapToInt (i > i).average().parallel();
• D.double avg = numbers.stream().average().getAsDouble();
• E.double avg = numbers.stream().collect(Collectors.averagingDouble(n > n));

Correct Answer: B,D

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Given:

and

What is the result?

• A.A NullPointerException is thrown at run time.
• B.The compilation fails.
• C.1
  Null
  null
• D.1
  1
  1
• E.A ClassCastException is thrown at run time.

Correct Answer: B

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