Practice What Is The This Keyword? (5.5.1) - Objects - ICSE 11 Computer Applications

Practice: What is the this Keyword?

Lesson 5.5.1Objects

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9 questions

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6 sample questions

Question 1.
What does the 'this' keyword refer to in a Java class?
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Think of it as pointing directly to the object itself.
Question 2.
How would you access an instance variable named 'height' using 'this'?
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Remember to use 'this.' before the variable name.
3Question 3.
What is the purpose of the 'this' keyword in Java?
- To create new objects
- To refer to the current object
- To access static variables
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It's all about the object you're currently working with.
4Question 4.
True or False: The 'this' keyword can be omitted if there's no ambiguity.
- True
- False
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Think of when it is helpful to explicitly indicate where the variable comes from.
Question 5.
Write a Car class using this in both the constructor and a method to display properties. Then demonstrate its use in a main class.
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Using 'this' correctly will reveal how data was set during instantiation.
Question 6.
Discuss a scenario where misunderstanding variable scopes can lead to incorrect program behavior. Create an example to illustrate.
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Focus on the outcome of using the same name for a parameter and an instance variable.

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