Java Programming for Complete Beginners - Java 16 - Step 07 - Understanding Basics of Encapsulation with Setter Methods

The video tutorial discusses the concept of encapsulation in programming, highlighting its importance in maintaining data integrity by restricting direct access to class variables. It explains how to fix encapsulation issues by making variables private and creating methods to set and access these variables. The tutorial provides practical examples and exercises to reinforce the understanding of encapsulation.

What is the main issue with the motorbike runner class accessing the motorbike's instance variable directly?

• It violates the principle of encapsulation.

• It enhances the performance of the program.

• It makes the code more readable.

• It allows for easier debugging.

What is encapsulation in object-oriented programming?

• A technique to reduce the number of classes.

• A way to make all variables public.

• A concept where data and methods are bundled together.

• A method to increase the speed of a program.

How can we prevent direct access to a class's instance variables?

• By using static methods.

• By using global variables.

• By making the variables public.

• By making the variables private.

What is the purpose of the 'set speed' method in the context of encapsulation?

• To make the speed variable public.

• To delete the speed variable.

• To provide a controlled way to modify the speed variable.

• To directly access the speed variable.

Why is it beneficial to use encapsulation in programming?

• It reduces the number of methods needed.

• It makes the code more complex.

• It allows for direct access to all variables.

• It provides a way to control how data is accessed and modified.

What should be the output type of a method that sets a value but does not return anything?

• boolean

• void

• String

• int

What is the role of 'this' keyword in the 'set speed' method?

• It refers to the local variable.

• It refers to the class itself.

• It refers to the method name.

• It refers to the global variable.