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|Interview Questions and Answers|
|Ans. Map is an interface where HashMap is the concrete class.|
Sample Code for map
Sample Code for hashmap
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|Difference between HashMap and Hashtable?|
|Difference between TreeMap and HashMap ?|
|Can you provide some implementation of a Dictionary having large number of words ?|
|What is a ConcurrentHashMap ?|
|How is Hashmap internally implemented in Java ?|
|Can we use null as a key for a map collection ?|
| Which of the following collections stores its elements in insertion Order ? |
|Why HashTable has been deprecated ?|
|Can we add duplicate keys in a HashMap ? What will happen if we attempt to add duplicate values ?|