Free Oracle 1Z1-816 Exam Dumps Questions & Answers

Which three annotation uses are valid? (Choose three.)

• A.  Function<String, String> func = (var @NonNull x) -> x.toUpperCase();
• B.  var v = "Hello" + (@Interned) "World"
• C.  var myString = (@NonNull String) str;
• D.  var obj = new @Interned MyObject();
• E.  Function<String, String> func = (@NonNull var x) -> x.toUpperCase();
• F.  Function<String, String> func = (@NonNull x) -> x.toUpperCase();

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

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

Given:

and:

Which code, when inserted on line 10, prints the number of unique localities from the roster list?

• A.  map(e -> e.getLocality())
  .count();
• B.  .filter(Employee::getLocality)
  .distinct()
  .count();
• C.  .map(Employee::getLocality)
  .distinct()
  .count();
• D.  .map(e -> e.getLocality())
  .collect(Collectors.toSet())
  .count();

Given:

And the command:
java Main Helloworld
What is the result ?

• A.  Input:
  Echo: Helloworld
• B.  Input: Helloworld Echo: Helloworld
• C.  Input: Echo:
• D.  A NullPointerException is thrown at run time.
• E.  Input:
  Then block until any input comes from System.in.

Given:

You want to use the myResource class in a try-with-resources statement. Which change will accomplish this?

• A.  Extend AutoCloseable and override the autoClose method.
• B.  Extend AutoCloseable and override the close method.
• C.  Implement AutoCloseable and override the autoClose method.
• D.  Implement AutoCloseable and override the close method.