ARUL KUMAR JAVA PDF

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Formatter class API for the format specification details.

Arun Kumar _ Java 5_J2EE Interviews Questions and Answers

For example a line item is a whole and product is a part. If you spell the methodName incorrectly, you will get a compile error.

Invoking object does not directly instantiate flyweights. Timed cache strategy where the cache can be replenished periodically i. Why it is a best practice to implement the user defined key class as an immutable object? Let us look at these non-final methods, which are meant primarily for extension i. Why are you leaving your current position? Jav can be called at any line. What is an enumeration?

LATEST JAVA interview Questions pdf arul kumar

Application Has a static main method. How would EJB 3. What makes you want to work hard? The size is the number of elements actually stored in the vector, while capacity is kjmar maximum number of elements it can store at a given instance of time. My blog compliments my books listed here.

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These questions are known as behavioral or situational questions. The hierarchy diagram is shown below. What are the pros and cons of annotations over XML based deployment descriptors? However after the lengthy initialization the GUI update should occur in the event dispatching thread, for thread safety reasons.

Byte codes are the machine language of the JVM. You can illustrate how you designed a particular application using OO concepts. Explain isAlive method under Thread class? If you need to support random access, without inserting or removing elements from any place other than the end, then ArrayList should be used. You can convert your list to an array with list.

Both the approaches make use of polymorphism and gives code reuse in different ways to achieve the same results but: Can you call one constructor from another if a class has multiple constructors? Overriding the Object class may seem simple but there are many ways to get it wrong, and consequence can be unpredictable behavior. If you do not include a constructor, the Java compiler will create a default constructor in the byte code with an empty argument.

Has no inherent security restriction. Now if you decide to modify the equals method of class Y so that it also provides equality comparison with class Z, then you will be violating this principle because no proper equals comparison exist for class X and class Z objects.

These classes cannot be instantiated and are either partially implemented or not at all implemented.

Arun Kumar _ Java 5_J2EE Interviews Questions and Answers – Free Download PDF

Where and how can you use a private constructor? It refers to writing programs that execute across multiple devices computersin which the devices are all connected to each other using a network.

Swing provides a richer set of components than AWT. What is inversion of control IoC also known more specifically as dependency injection? Java uses Just-In-Time compiler to enable high performance.

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Only repaint method can be explicitly invoked which implicitly calls paintComponent method and only paintComponent method should be overridden if required. Java uses the assert statement to implement pre- and post-conditions. What are your career goals? Reflect back on your past jobs and pick two to five instances where you used your skills in the key areas very successfully. What is the order of method invocation in an applet?

Sub class inherits all the public and protected methods and the implementation. What is the difference between an applet and an application? The memory usage drastically increased during and after certain user operations like generating PDF reports.

Complex layouts can be simplified by using nested containers for example having panels within hava and each panel can use its own LayoutManager. What is Singleton kava Whenever hashCode method is invoked on the same object more than once during an execution of a Java program, this method must consistently return the same integer result.

This is one of 3 methods used by JComponents to paint themselves.

Do you have any experience with AOP? Let us look at an example: Illustrate that you can communicate effectively with all the team members, business analysts, users, testers, stake holders etc. Dirty check strategy where your application is the only one which can mutate i. Object based programming kuumar follow all the features of OOPs except Inheritance.