Given the code fragment:

What is the result?

• A.A NullPointerException is thrown at runtime.
• B.Null element 0
  Null element 1
• C.Null
  Null
• D.Element 0
  Element 1

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Given:

Which option enables the code to compile?

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

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Which three statements are true about the structure of a Java class?

• A.A class can have overloaded static methods.
• B.A public class must have a main method.
• C.The methods are mandatory components of a class.
• D.A method can have the same name as a field.
• E.A class can have only one private constructor.
• F.The fields need not be initialized before use.

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Given the code fragment:

Which three code fragments are valid at line n1? (Choose three.)

• A.
• B.
• C.
• D.
• E.

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Given:

What is the result?

• A.CC
• B.A ClassCastException is thrown only at line n1.
• C.AC
• D.AB
• E.A ClassCastException is thrown only at line n2.

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