Below we have listed all the Java Interview Questions and answers. Feel free to comment on any Java Interview Questions or answer by the comment feature available on the page.
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Java is a programming language and computing platform first released by Sun Microsystems in 1995. There are lots of applications and websites that will not work unless you have Java installed, and more are created every day. Java is fast, secure, and reliable. Java is a programming language expressly designed for use in the distributed environment of the Internet. It was designed to have the "look and feel" of the C++ language, but it is simpler to use than C++ and enforces an object-oriented programming model.
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What is an object's lock and which object's have locks? | 
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How single threaded model works after implementation in class, basically architecture point of view. |
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What is Singleton class? | 
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What is the difference between String and StringBuffer? |
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What is the Map interface? |
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How does multithreading take place on a computer with a single CPU? |
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Why single inheritance cannot be use in java/why we alwayz use multiple inheritances? |
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What happens when you add a double value to a String? |
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How are the elements of a GridLayout organized? |
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Tell me the latest versions in JAVA related areas? |
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In servlets, we are having a web page that is invoking servlets username and password. which is cheks in the database, Suppose the second page also. If we want to verify the same information whether it will connect to the database or it will be used previous information? |
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What is the difference between the >> and >>> operators? |
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How will you communicate between two Applets? |
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What method must be implemented by all threads? |
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What is the meaning of "final" keyword? |
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Discuss the differences between creating a new class, extending a class and implementing an interface; and when each would be appropriate. |
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A Inner class is defined in a parameterized function of outer class then the inner class is able to access the parameters of that function? |
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What is the difference b/w Iterator & ListIterator |
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What is meant by Session, Tell me something about HTTPSession Class? |
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What are the objects that are not subject to garbage collection? |
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