Java Programming for Complete Beginners - Java 16 - Step 11 - Introduction to Encapsulation - Level 2

The video tutorial covers the concept of encapsulation in programming, emphasizing its importance in preventing bad data from entering objects. It demonstrates how to increase the speed of objects like Ducati and Honda using encapsulation techniques. The tutorial refactors the code to eliminate duplication by introducing methods for increasing and decreasing speed. It concludes with exercises to further practice encapsulation by modifying a book class.

Why is encapsulation important in object-oriented programming?

• To make code more complex

• To prevent unauthorized access to object data

• To increase the speed of execution

• To allow direct access to object data

What is the initial speed of the Ducati in the given scenario?

• 100

• 50

• 0

• 200

What is the main issue with the initial logic used to increase the speed of the motorbikes?

• It duplicates code

• It is too simple

• It is too complex

• It does not work

How does the new method in the Motorbike class improve the code?

• By increasing the speed automatically

• By encapsulating the logic and reducing duplication

• By duplicating logic

• By making it more complex

What additional functionality is added to the Motorbike class?

• A method to change color

• A method to decrease speed

• A method to increase fuel efficiency

• A method to add a passenger

What happens if the speed is decreased by more than the current speed?

• The speed becomes zero

• The speed becomes negative

• The speed remains unchanged

• The speed increases

What exercise is suggested for further practice?

• Create a method to calculate fuel efficiency

• Add methods to increase and decrease the number of copies in a book class

• Add methods to change the bike's model

• Create a method to change the bike's color