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Answer: Hash tables (hash maps) - is amortized constant-time access data structures that map keys to values. Binary Trees - is a tree data structur ...
This is a variation of an iron triangle question: The Project Management Triangle (called also Triple Constraint) is a model of the constraints of pr ...
Abstract class must be extended/sub classed (to be useful). It serves as a template. A class that is abstract may not be instantiated (ie, you may not ...
Constructor which initializes the it's object member variables ( by shallow copying) with another object of the same class. If you don't implement one ...
Externalizable is an interface which contains two methods readExternal and writeExternal. These methods give you a control over the serialization mech ...
Under preemptive scheduling, the highest priority task executes until it enters the waiting or dead states or a higher priority task comes into existe ...
The List interface provides support for ordered collections of objects.

[Source: JAGAN MOHAN "Interview questions bible"]