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Design a task management system supporting creation, retrieval, and status updates.
Ensure all operations execute in constant time using an efficient lookup structure.
Handle missing tasks gracefully and protect internal state from external modifications.
What This Tests
Hash table utilization for O(1) key-value lookups
Object-oriented design and data encapsulation
Defensive programming practices like copy-on-read
Edge case handling for non-existent records
Common Patterns
Hashing
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