If you are looking for frequently asked advanced Java interview questions for your next interview, you are at the right place. Here we have listed 10 questions that you may be asked in your next interview.
1. What do you think Java is platform independent?
Essentially, the core concept of Java lies in the fact that once written it can be run anywhere. More specifically, the bytecodes of Java can run on any platform, the underlying operations notwithstanding. So it is platform independent.
2. What do you mean by dynamic method dispatch?
Also known as runtime polymorphism, the name itself hints at the possible meaning. Specifically, it is a method in which the overridden method is resolved at runtime, not at compile time. More specifically, the concerned method is essentially called through a reference variable of a superclass.
3. Do you think it is feasible to override a static method in Java?
No, it is essentially impossible to override a static method in Java. Also, you cannot override a private method. At most, the programmer may create another private method with the same name as the child class.
4. What do you understand by the term multiple inheritance?
As the name itself hints, multiple inheritance is defined as the process in which a child class inherits the properties of multiple parent classes. Essentially, multiple inheritance, also known as the diamond problem, is not supported by Java.
5. What do you mean by the term Java Servlet?
A Java Servlet is defined as the server side technology which is meant to induce extension of web servers by corroboration of dynamic response and data persistence.
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6. Tell us something about the prospects of session management in servlets.
A session is essentially defined as the dynamic state of random conversation between the client and the server. The essential communication channel includes a string of responses and requests from both sides. There are many ways of session management. For instance, some of the most common ones include the likes of cookie application, session management API, user authentication, HTML hidden field and URL rewriting. Typically, the most popular way of implementing session management is the employment of a session ID in the communicative discourse of the client and the server.
7. What do you think is the essential purpose of the JDBC ResultSet Interface?
The core purpose of the JDBC ResultSet Interface is the representation of a row in a table. Apart from that, it can also be used to alter the cursor pointer and churn info from the database.
8. Tell us something about the Spring framework.
So far as the Spring framework is concerned, it is essentially defined as an application framework and inversion of control container for Java. Basically, the chief purpose of the spring framework is to create enterprise applications in Java. Also, it is especially useful to keep in mind that the central features of the spring framework are essentially conducive to any Java application.
9. Speaking of the spring framework, explain beans.
It may be understood this way that beans are objects that comprise the cardinal scope of the spring framework. Beans are managed by the Spring IoC container. Additionally, speaking of beans, it is fundamental to keep in mind the essential scopes: singleton, prototype, request, session and global session.
10. What do you understand by the term auto wiring in spring? Also, mention the different auto wiring modes used in Java.
Generally speaking, auto wiring is defined as the process of injecting beans automatically into a spring application. Precisely, the programmer does not need to write the injection codes. And this is exactly the idea of auto wiring, as the name itself suggests. Also, there are various different modes of it. These include no, byName, byType and constructor. Each mode is used for the injection of beans in its own way. Of the four, the first mode is the default mode.
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