Practice Abstraction (4.5) - Chapter 4: Object-Oriented Programming (OOP) in Java

Practice: Abstraction

Lesson 4.5Object-Oriented Programming (OOP) in Java

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9 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is abstraction in programming?
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Think about operating complex machines.
Question 2.
Give an example of an abstract class.
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Consider real-world entities.
3Question 3.
What is the purpose of abstraction in Java?
- To expose all details of a class
- To hide complex details and show only essential features
- To make class implementation easier
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Consider driving a car.
4Question 4.
True or False: An abstract class can be instantiated.
- True
- False
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Think about what 'abstract' means.
Question 5.
Design an abstract class for a Vehicle with methods for start, stop, and a property called fuelType. Create subclasses for Car and Motorcycle that implement these methods.
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Think about the functionalities specific to each vehicle type.
Question 6.
Consider a bank system that has an abstract class Account with an abstract method getBalance(). Implement it for CheckingAccount and SavingsAccount. Discuss the advantages of using abstraction in this case.
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Use the abstraction principle to maintain code clarity.

5 more questions in this section. Enroll free to practise them all.