Which three statements describe the object-oriented features of the Java language?

• A.A subclass can inherit from a superclass.
• B.Object is the root class of all other objects.
• C.Objects cannot be reused.
• D.Objects can share behaviors with other objects.
• E.A main method must be declared in every class.
• F.A package must contain more than one class.

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Given:

What is the result?

• A.nothing
• B.It fails to compile.
• C.0
• D.A java.lang.IllegalArgumentException is thrown.
• E.10

Correct Answer: B

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Given:

What is the result?

• A.watermelon
  orange
  lemon
  grape
  apricot
  apple
• B.nothing
• C.apple
  apricot
  grape
  lemon
  orange
  watermelon
• D.apple
  orange
  grape
  lemon
  apricot
  watermelon

Correct Answer: A

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Given:

What is the result?

• A.Map: 0 Keys: 0 Values: 0
• B.The compilation fails.
• C.Map: 4 Keys: 4 Values: 4
• D.Map: 4 Keys: 0 Values: 0
• E.Map: 0 Keys: 4 Values: 4

Correct Answer: D

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Given:

Which code, when inserted at one or more marked positions, would allow classes B and C to compile?

• A.@Override // position 3void x () {} // position 3@Override // position 3public void z() { } // position 3
• B.@Override // position 2public void z() { } // position 3
• C.implements A // position 1@Override // position 2
• D.public void z() { } // position 3

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