Basics of Java Programming
The Object Oriented Programming(OOP) of java makes it a user friendly programming language used for a wide sphere of software developing. When it comes to discuss functionality of Java programming, some of the basic core Java interview questions are those which scratches the OOPs concepts of java and their handling in different periphery to ensure a smooth and user friendly environment.
Although some basic questions regarding elements of java like keywords and rectifiers play a vital role in checking knowledge of the discussant, In order to grab a overall prospect in Java Programming, one should focus on the OOPs concepts which lays the robust framework of Java Programming.
There are at count four OOPs concepts of Java as enlisted below which could be used as a benchmark to check any applicant’s knowledge :
Encapsulation is the method of keeping fields in class private, then providing access to them via public platforms. This is a type of protective film in programming which keeps the code and data safe within its class perimeter. Encapsulation ensure privacy of data within a class which serves a great purpose when it comes to restrict the hands on certain patch of code. It restricts open access to the data system wise.
Inheritance is a unique feature of OOPs concept which allows classes to share some common attributes with existing classes. In this way, Inheritance create a tree like structure within the system which can connect several aspects of a class to another class without reinventing any particular type.
Abstraction is the way to use simplified items to represent complexity. In Java Programming, elements like objects, classes and variables serves the purpose of representing more complex underlying code and data which keeps the user in a friendly zone. Abstraction is necessary as it lets avoid repeating the same work multiple times.
Polymorphism is a special concept which lets programmers use same word to mean different things in varied contexts. This method curb the possibility of data redundancy in Java Programming. One form of polymorphism in Java is method overloading. That’s when different meanings are implied by the code itself. The other form is method overriding. That’s when the different meanings are implied by the values of the supplied variables. Polymorphism serves a great deal to simplify the use of words in a certain Java Program.
Apart from the Object Oriented Programming which is the center of Java Programming, to check the knowledge about other basic aspects, an interviewer can asks questions related to elements like keywords, rectifiers and functions which lays the basic protocol of any Java Program.