In each blank, try to type in the
word that is missing. If you've
typed in the correct word, the
blank will turn green.
If your not sure what answer should be entered, press the space bar and the next missing letter will be displayed. When you are all done, you should look back over all your answers and review the ones in red. These ones in red are the ones which you needed help on. Question: What is used for?Answer: is used to place common code in a base class. Question: Give two of using inheritance when writing code.Answer: makes code more modular and easier to maintain. Question: What is the "extends" used for?Answer: The extends keyword is used to or inherit a class. Question: Which keyword is used in order to a class?Answer: The extends keyword is used to or inherit a class. Question: What does subclass inherit from its superclass ?Answer: When a class inherits another class, it access to all of its visible methods and instance variables. Question: What is a ?Answer: The class that is being inherited is referred to as the base or superclass. Question: What is a base ?Answer: The class that is being inherited is referred to as the base class or . Question: How is a class that is inherited referred to?Answer: The class that is being inherited is referred to as the base or superclass. Question: What is a ?Answer: The class that gains the functionality of a superclass by inheritance is the subclass. Question: A method in a can be overridden by the subclass having a method with an identical signature.Answer: Question: What is the keyword used for?Answer: The super can be used to access the overridden method. Question: How many classes may a extend?Answer: A class can only one other class. Question: What is a concrete ?Answer: A concrete class is a class that can be instantiated; all of its methods have been . Question: What is an abstract ?Answer: An abstract class cannot be instantiated. It must be extended and may or may not abstract methods. Question: Describe the process of an abstract class.Answer: When a class extends an abstract , all of the abstract methods must be implemented. Question: What is an used for?Answer: An interface is used to define a public that a class must have. Question: What is the keyword used for?Answer: The keyword implements is used to implement an interface.he keyword implements is used to implement an . Question: How many interfaces may a implement? How is it done?Answer: A may implement multiple interfaces by using a comma-delimited list. Question: Describe the process of implementing an .Answer: A class that implements an interface must implement all of the contained in the interface. Question: What is ?Answer: Encapsulation is the concept of storing related data and code . Question: What are modifiers used for?Answer: Access modifiers can be used to access to methods and instance variables. Question: What does the access modifier do?Answer: The public access modifier allows any class to access the public or instance variable. Question: What does the access modifier do?Answer: The private access modifier allows only methods in the same to access the private method or instance variable. Question: What is information ?Answer: Information hiding is the concept of using restrictive access modifiers to hide the details of a class. Question: When creating methods, how the restrictivity of the modifiers be chosen?Answer: When creating methods or variables, the most restrictive access modifier possible should be used. Question: What is a ?Answer: A getter is used to access private variables. Question: What is a ?Answer: A setter is used to set instance variables. Question: What conventions are used for getters and ?Answer: Both 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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