What is the name of the Java concept that uses access modifiers to protect variables and hide them within a class?

• A.Inheritance
• B.Encapsulation
• C.Polymorphism
• D.Abstraction
• E.Instantiation

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Given the code fragment: What is the result if the integer aVar is 9?

• A.Hello Universe!
• B.Hello World!
• C.Hello World!
• D.Compilation fails.

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Which code fragment causes a compilation error?

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

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boolean log3 = ( 5.0 != 6.0) && ( 4 != 5);
boolean log4 = (4 != 4) || (4 == 4);
System.out.println("log3:"+ log3 + \nlog4" + log4);
What is the result?

• A.log3:false log4:false
• B.log3:true log4:false
• C.log3:true log4:true
• D.log3:false log4:true

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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 calculatePrice (Toy t) method calculates the price of a toy.

The void printToy (Toy t) method prints the details of a toy.

Which definition of the Toy class adds a valid layer of abstraction to the class hierarchy?
A:

B:

C:

D:

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

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