Contents
How do you access the members of a class?
The data members and member functions declared as public can be accessed by other classes and functions too. The public members of a class can be accessed from anywhere in the program using the direct member access operator (.) with the object of that class.
What is the method that has no method statements but any class derived from its class must override it by providing a method body?
An abstract method: has no method statements; any class derived from a class that contains an abstract method must override the abstract method by providing a body (an implementation) for it.
What are implementation methods?
Implementing can be defined as putting (a decision, plan, agreement, etc.) into effect. Systems implementation is the delivery of that system into production (that is, the day-to-day business or organization operation)..
Which concept is used to implement the information hiding?
Encapsulation
Encapsulation is one of the core concepts in object-oriented programming. It describes the bundling of data and methods operating on this data into one unit. It is often used to implement an information-hiding mechanism.
Do you have to implement interface methods in abstract class?
If you indeed plan on creating an abstract class out of it, then there is no rule that says you’ve to implement all the interface methods (note that in such a case it is mandatory to declare the derived class as abstract)
What happens when an object is used in a subclass in Java?
If an object of a parent class is used to invoke the method, then the version in the parent class will be executed, but if an object of the subclass is used to invoke the method, then the version in the child class will be executed.
How are interfaces defined in a class diagram?
In order to realize an interface, a class or component should use the operations and attributes that are defined by the interface. Any given class or component may use zero or more interfaces and one or more classes or components can use the same interface.
What do you need to know about Java Authentication?
This document is intended for experienced programmers who require the ability to write a LoginModule implementing an authentication technology. Authentication technology providers must implement the LoginModule interface. LoginModule s are plugged in under applications to provide a particular type of authentication.