What is bean? Where it can be used?
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Is array an object in java?
How java uses the string and stringbuffer classes?
How do you write a scanner class in java?
what is polymorhism what is inheritance? what is Abstract n Interface? what if two interfaces have same method and a concrete class is implementing both the interfaces. Will there be a compilation error? What are mutable and immutable classes? How can u make a class mutable? when will u use dem ...explain with example? what is overriding and overloading? what is garbage collection? what is Thread? how do dey communicate? what are the different ways of implementing ? have u used any messaging technologies? what is synchronization? what are some additions in java 1.5? what are generics? whst is advanced for loop? what is finally block? can u have a try in finally? yes!! can u have a finally in finally? how do you write junits? when is a object eligible for garbage collection?explain? a = null and b has ref to a will b be eligible to be garbage collected? sql questions like diff joins? how do dey work? exception handling? what is marker interface? what is the need??
What is cloneable interface?
What are the four pillars of java?
Difference between this(), super()?
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Explain the private field modifier?
Difference between abstract and concrete class ?
explain multi-threading in java?
Explain about collection interface in java?
How many types of modifiers are there?