Given:

What is the result?

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

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Given:

What will be the output?

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

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Given the following code for a Planet object:

What is the output?

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

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Given the code fragment:

What is the result?

• A.Compilation fails.
• B.The program compiles, but it prints nothing.
• C.HiHowAreYou removed
• D.An UnsupportedOperationExceptionis thrown at runtime.

Correct Answer: B

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Given these requirements:
* Bus and Boat are Vehicle type classes.
* The start() and stop() methods perform common operations across the Vehicle class type.
* The ride() method performs a unique operations for each type of Vehicle.
Which set of actions meets the requirements with optimized code?

• A.1. Create an abstract class Vehicle by defining start() and stop() methods, and declaring the ride() abstract method.
  2. Create Bus and Boat classes by inheriting the Vehicle class and overriding the ride() method.
• B.1. Create an interface Vehicle by defining start() and stop() methods, and declaring the ride() abstract method.
  2. Create Bus and Boat classes by implementing the Vehicle class.
• C.1. Create an interface Vehicle by defining default stop(), start(), and ride() methods.
  2. Create Bus and Boat classes by implementing the Vehicle interface and overriding the ride() method.
• D.1. Create an abstract class Vehicle by declaring stop(), start(), and ride() abstract methods.
  2. Create Bus and Boat classes by inheriting the Vehicle class and overriding all the methods.

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