SCJA-drills-chap07
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| show | Inheritance is used to place common code in a base class.
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| Give two advantages of using inheritance when writing code. | show 🗑
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| What is the "extends" keyword used for? | show 🗑
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| Which keyword is used in order to inherit a class? | show 🗑
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| What does subclass inherit from its superclass class? | show 🗑
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| show | The class that is being inherited is referred to as the base class or superclass.
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| show | The class that is being inherited is referred to as the base class or superclass.
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| show | The class that is being inherited is referred to as the base class or superclass.
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| show | The class that gains the functionality of a superclass by inheritance is called the subclass.
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| What is the "super" keyword used for? | show 🗑
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| show | A class can only extend one other class.
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| What is a concrete class? | show 🗑
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| show | An abstract class cannot be instantiated. It must be extended and may or may not contain abstract methods.
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| Describe the process of extending an abstract class. | show 🗑
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| show | An interface is used to define a public interface that a class must have.
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| show | The keyword implements is used to implement an interface.he keyword implements is used to implement an interface.
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| How many interfaces may a class implement? How is it done? | show 🗑
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| show | A class that implements an interface must implement all of the methods contained in the interface.
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| What is encapsulation? | show 🗑
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| What are access modifiers used for? | show 🗑
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| show | The public access modifier allows any class to access the public method or instance variable.
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| What does the private access modifier do? | show 🗑
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| show | Information hiding is the concept of using restrictive access modifiers to hide the implementation details of a class.
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| When creating methods, how should the restrictivity of the modifiers be chosen? | show 🗑
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| What is a getter? | show 🗑
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| What is a setter? | show 🗑
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| show | Both getters and setters should follow the JavaBeans naming convention. They should start with ‘get’, ‘set’, or ‘is’, followed by the variable name, starting with a capital letter.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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