Practice Object Lifecycle In Java (5.6) - Objects

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9 questions

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2 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 keyword is used to create an object in Java?
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Think of what you use to call a constructor.
Question 2.
What happens when an object is no longer referenced?
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Consider what happens to trash when it isn't picked up.
3Question 3.
What does the new keyword do in Java?
- Creates a new class
- Allocates memory for an object
- Initializes a variable
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Remember what new does when you want to create something.
4Question 4.
True or False: The garbage collector in Java will free memory for any object immediately when it goes out of scope.
- True
- False
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Consider how trash isn't taken out the moment you throw it away.
Question 5.
Write a Java program that creates multiple objects of a class, removes references to some of them, and discusses the expected garbage collection behavior.
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Think about how you would clear your desktop of old files.
Question 6.
Analyze memory management in Java without garbage collection. What major issues could arise?
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Picture how an overflowing bin hampers accessibility.

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