What is the hashcode () and equals () used for?
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What is ordered map in java?
What is the difference between serializable and externalizable interface?
Life Cycle of Thread
What is JVM ? use of JVM?
Explain different types of wrapper classes in java?
Difference between arraylist and hashset in java?
What is the method overriding?
What is meant by class loader and how many types are there?
what is the use of declaring constructor as private?
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Difference between local and global transaction ?
What is user defined exception?
What is the Vector class?