Answer Posted / stranger_ajnabi53@yahoo.c

they are
1.polymorphism
2.abstraction
3.inheritance
4.encapsulation

What is appletviewer?

561

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Is the milky way in a void?

536

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Is java map thread safe?

485

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What is singleton math?

567

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Why a dead thread occurs?

566

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Explain which of the following methods releases the lock when yield(), join(),sleep(),wait(),notify(), notifyall() methods are executed?

605

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How will you print number in reverse (descending) order in BST.

572

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What is 32 bit float?

551

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Explain how hashmap works?

586

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Explain wait(), notify() and notifyall() methods of object class ?

585

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What is void keyword?

662

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What does nullpointerexception mean?

607

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Is age a discrete variable?

520

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Which keyword specify that a variable is effectively final ?

555

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What is the use of default method in interface in java? Explain

541

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