Question

Can you explain the differences between a normal hashmap in c++ vs a finalHashmap (c++)? Plesae give advantages and disadvantages of both!

Answer 1

A common hashmap in c++ maps the elements with the keys in an arbitrary manner in an unordered map and sorted manner in the sorted map.The hashmap belongs to the outdated and unstandardized version of the unordered map.The unordered map has the constant complexity of O(1) for the access and insertion.The ordered set has O(logn) complexity because of the sorted key-value pairs.

whereas,

The final hashmaps does not allow the value updation for the corresponding key and prevents the deletion of any key.The hash and key should be final in java