Answer / Arun Verma

Yes, HashMap is an implementation of the Map interface in Java and it is an object because all classes in Java are objects.

What are the data structures used in RDBMS, Network data model & Hierarchical data model?

1 Answers   Accenture,

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Parenthesis are never needed in prefix or postfix expressions. Why?

13 Answers   BPO, Microsoft,

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Which is faster array or list?

1 Answers  

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What is a data structure node class?

1 Answers  

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Explain heapsort. What is its complexity?

1 Answers   Essar,

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What is default size of hashmap?

1 Answers  

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Explain how is linked list implemented?

1 Answers   BPL,

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What is adt in data structure?

1 Answers  

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What are the advantages of merge sort?

1 Answers  

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Explain the difference between a list and array.

1 Answers   TCS,

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Why is tuple immutable?

1 Answers  

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When is a binary search best applied?

1 Answers  

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