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??
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java can provide security ,how can provide?
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Difference between character constant and string constant in java ?
whst is encapsulation?when u encpsulate actually while devoloping code?
Can we declare an interface as final?
what is mean by method signature?
How many bytes is a string in java?
What if constructor is protected in java?
Explain list interface?
What are some alternatives to inheritance?
When should I use singleton?
When try and catch block is used ?
How do I print a “?