SDET Mock Interview on Java Map

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Key-Value Pair Storage:
Java Map is used to store data in key-value pairs, enabling quick access to values via unique keys.
Supports Multiple Implementations:
Includes HashMap, TreeMap, LinkedHashMap, and ConcurrentHashMap, each optimized for specific use cases like ordering or concurrency.
Null Handling:
Some implementations like HashMap allow one null key and multiple null values, while others, like TreeMap, do not support null keys.
Iterating Over Entries:
Provides multiple ways to traverse entries, including for-each, Iterator, and Stream APIs for flexible processing.
Performance Considerations:
Different implementations offer varying performance characteristics, e.g., HashMap is faster for non-thread-safe operations, while ConcurrentHashMap ensures thread safety.

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