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Leave this topic until the interviewer brings it up or you can negotiate this with your agent once you have been offered the position. As you can see from the diagram below, containers collect components. Give an overview of hibernate framework? If the array is an array of primitive types, then all the elements of the array will be initialized to the default value corresponding to that primitive type.

Inheritance can also be defined as the process whereby one object acquires characteristics from one or more other objects the same way children acquire characteristics from their parents. If you have a class in a package, what do you need to do to run it? Patterns reflect the experience and knowledge of developers who have successfully used these patterns in their own work.

Why there are some interfaces with no defined methods i. By implementing Comparable, sorting an array of objects or a collection List etc is as simple as: No paintXXXX methods including paint method should not be explicitly invoked. What is constructor chaining and how is it achieved in Java? In design, you want the base class to present only an interface for its derived classes.


What is attribute or annotation oriented programming? What are the advantages of ArrayList over arrays? For example, a stack allows access to only last item inserted. How about using a Business Delegate? Typical M V C architecture is show n above. The class House will have an instance variable, which refers to a Bathroom object. An exception can be thrown, either a newly instantiated one or an exception that you just caught, by using throw keyword.

What is an Interface? Your chief information officer was very disappointed with this poor rating and wanted the business analysts, business owners i.

Arun Kumar _ Java 5_J2EE Interviews Questions and Answers

If multiple threads concurrently access a collection and at least one of the threads either adds or deletes an entry into the collection, then the collection must be externally synchronized.

It is cheaper to recycle objects than creating new objects each time. If a precondition fails then agul is a bug in the calling-method or calling software component. Once the static member is imported then you can use it in your code without the class name prefix.

Do you have any experience with AOP? The non-final methods are equalshashCodetoStringcloneand finalize. If you happen to be in an interview with an organization facing serious issues with regards to their Java application relating to memory leaks, performance problems or a crashing JVM etc then you are likely to be asked questions on these topics.


Which method must be implemented by all threads? How will you communicate between two Applets? Refer Q in Enterprise section. In case where you want to use implementation inheritance then it is usually provided by an abstract base class. Component based development provides an opportunity for greater code reuse than what is possible with Object Oriented OO development.

Polymorphism is the ability of an object to take on many forms. Which number is denoted by leading zero in java? How to package a module, which is, shared by both the Web and the EJB modules? Explain the Java Collections Framework? If a class has multiple functions by same name but different parameters, it is known as Method Overloading.

Lack of good understanding in the core essentials can be a speed breaker to your career advancement. What has been your experience in giving presentations to small or large groups?

At the end of iteration, it was tested by the testers, while the developers moved on to the next iteration. What do you mean by Access Modifier?

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Layout managers are used for arranging GUI components in windows. Can constructor be inherited? You can lock the entire list while iterating by wrapping your code within a synchronized block. Explain the J2EE 3-tier or n-tier architecture?

The integer result need not remain consistent from one execution of the program to the next execution of the same program.