You can create a string object as string str = “abc”; why cant a button object be created as button bt = “abc”;? Explain
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 variable explain?
Who is the owner of java?
What are the advantages and disadvantages of reference counting in garbage collection?
Which is bigger double or float?
What is the difference between a loader and a compiler?
Can a static class implement an interface?
How would you use Bubble Sort to sort the number of elements?
What is difference between pointer and reference?
What are user defined exceptions?
What are the differences between processes and threads?
How do you download stubs from Remote place?