Given:

What is the result?

• A.97 98
  99 100 101 102 103
• B.97 98
  99 100 null null null
• C.A NullPointerException is thrown at runtime.
• D.An ArraylndexOutOfBoundsException is thrown at runtime.
• E.Compilation fails.

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You are asked to develop a program for a shopping application, and you are given the following information:
The application must contain the classes Toy, EduToy, and ConsToy. The Toy class is the superclass of the other two classes.
The int caicuiatePrice (Toy t) method calculates the price of a toy.
The void printToy (Toy t) method printsthe details of a toy.
Which definition of the Toy class adds a valid layer of abstraction to the class hierarchy?

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

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Given the code fragment:

What is the result?

• A.Compilation fails only at line n2.
• B.Invalid calculation
• C.Answer = 0
• D.Compilation fails only at line n1 and line2.
• E.Compilation fails only at line n1.

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Given the code fragments:

Which modification enables the code to compile?
A:

B:

C:

D:

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

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Given the code fragment:

Which code fragment, when inserted at line 9, enables the code to print true?

• A.String str2 = str1;
• B.String str2 = "Duke";
• C.String str2 = sb1. toString ();
• D.String str2 = new String (str1);

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