Java — Which Map implementation maintains iteration order of an existing Map?

Introduction / Context:
This question tests knowledge of different Map implementations in Java and their ordering characteristics.

Concept / Approach:

• HashMap → no ordering guarantee.
• TreeMap → natural or custom comparator order, not iteration order.
• LinkedHashMap → maintains insertion order or access order.

Step-by-Step Reasoning:

Why Other Options Are Wrong:
TreeMap re-sorts keys, HashMap randomizes order, and "depends on implementation" is too vague.

Final Answer:
LinkedHashMap