Practice Object Class And Method Overriding (java-specific) (11.4)

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8 questions

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6 sample questions

Question 1.
What is the Object class in Java?
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Think about where all classes start from.
Question 2.
What does method overriding allow in Java?
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Consider how subclasses can change behaviors.
3Question 3.
What method is used to compare two objects for equality in Java?
- compare()
- equals()
- isSame()
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Think of how you'd compare two items.
4Question 4.
True or False: Every class in Java inherits from the Object class.
- True
- False
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Consider the root of the class hierarchy.
Question 5.
Create a Java class hierarchy with a superclass Vehicle and subclasses Car and Truck. Override a method in both subclasses and demonstrate polymorphism.
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Think of how methods might behave differently in subclasses.
Question 6.
Why is method overriding also beneficial for code testing?
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Consider how testing frameworks often need different behaviors from the same method.

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