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 are three ways in which a thread can enter the waiting state? | 
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what is the difference between putting a class as abstract or if any of method in class is declared as abstract diference of these two while extending these two types of classes |
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How will you communicate between two Applets? |
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Is &&= a valid Java operator? |
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What is the difference between the String and StringBuffer classes? |
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can we declare multiple main() methods in multiple classes.ie can we have each main method in its class in our program? |
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When a thread blocks on I/O, what state does it enter? |
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How have you done validation of the fileds in your project? | 
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What is meant by distributed Application. Why we are using that in our applications? |
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Why do threads block on I/O? |
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What is JIT? Is it bundled with JDK? If so what is the role of interpreter(java)? plz explain in detail. |
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What is the Map interface? |
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How can a dead thread be restarted? |
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IS String is a wrapperclass? explain wrapper class |
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What is meant by Session, Tell me something about HTTPSession Class? |
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How to create own Marker Interface with example |
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What is an RMI? |
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Why java does not support multiple inheritance.why we go for interfaces |
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what happens if we execute the program? class Return{ int display(){ try{ return 1; } finally{ return 2; } } public static void main(String args[]){ Return r=new Return(); r.display(); } } |
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What are the various access modifiers in Java. Differences between them? |
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