Mastering Java: The Ultimate Quiz for 'Thinking in Java'

Disable ads (and more) with a membership for a one time $2.99 payment

Mastering Java: The Ultimate Quiz for 'Thinking in Java'. Dive deep into Java with multiple-choice questions. Challenge yourself with quiz questions designed to test and improve your understanding of the 'Thinking in Java' book. Get ready for your exam!

Start Multiple Choice Practice Test
Start Flash Cards

Practice this question and more.

Which classes or interfaces are essential to create a null proxy object as demonstrated?

  1. NullRobot, NullRobotProxyHandler, Null, and Robot

  2. Proxy, Method, and InvocationHandler

  3. NRobot, Null, and Robot

  4. NullRobot, NRobot, and Proxy

The correct answer is: Proxy, Method, and InvocationHandler

When creating a null proxy object, the essential classes and interfaces are Proxy, Method, and InvocationHandler. Option A is incorrect because the classes NullRobot, NullRobotProxyHandler, Null, and Robot are not necessary to create a null proxy object. Option C is also incorrect because it includes the non-existent class NRobot. Option D is incorrect because it includes both NullRobot and NRobot which are not necessary for creating a null proxy object.

More Questions Like This