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This book is about how you can go about opening more doors as a software engineer. What do you know about Java? CO Coding to an interface reduces coupling and interface inheritance can achieve code reuse with the help of object composition. You don’t need to worry if you are familiar with the fundamentals.

Arun Kumar _ Java 5_J2EE Interviews Questions and Answers

Explain the Java Collections Framework? Many interviewers end with a request to the applicant as to whether they have anything they wish to add. What are the usages of Java packages? The non-final methods are equalshashCodetoStringcloneand finalize.


Once the class is dynamically loaded the following method returns an instance of the loaded class. The success in the interviews did not come easily. Singleton class control object creation, limiting the number to one but allowing the flexibility to create more objects if the situation changes.

Arulkumaran’s Books and Publications Spotlight

The class ClassLoader is an abstract class. Wherever possible, you should look for ways to minimize the number of objects created in your kava Business tier provides the business services.

The assertion statements have two forms as shown below: The non-configurable services include enterprise bean EJB and servlet life cycle management, resource pooling etc. You may also say that jqva chance to make a contribution is very low due to company wide changes or looking for a more challenging senior or designer role.

Pooling your valuable resources like threads, database and socket connections.

This adds additional burden on the programmer to manage the pool, but in selected cases it kuamr represent a significant performance gain. When a byte datatype is used? What are Wrapper classes?

You can convert your list to an array with list. Method overloading increases the readability of the program. The method calculateInterest … has its specific implementation in its own class.

The standard layout managers are: The java compiler creates a default constructor only if there is no constructor in the class. You should act interested in the company and the job and make all comments in a positive manner. No, this is not possible. It refers to aryl ability to make a class abstract in OOP. A Map is an object that maps keys to values, where the list of keys is itself a collection object. It is safe to say: Why use design patterns, you may ask Refer Q5 in Enterprise section.


The sample code above describes how encapsulation can be used aful protect the MyMarks object hava having negative values.

If the user leaves the page and returns without killing the current browser session, the start method is called without being preceded by init.

200 LATEST JAVA interview Questions pdf arul kumar

What is the kumxr between the paint and repaint methods? Can you describe a situation where you applied your problem solving skills? What are the benefits of AOP? They are not suited for financial calculations of monetary values. What is the default value of float and double datatype in Java?