FAANG / Big Tech interview question · Most asked
Explain LRU cache design.
Summary
Hash map + doubly linked list (or OrderedDict): O(1) get/put with eviction of least recently used key.
Longer Answer
Hash map + doubly linked list (or OrderedDict): O(1) get/put with eviction of least recently used key. Extremely common design+coding hybrid.
Key Points
- Hash map + doubly linked list (or OrderedDict): O(1) get/put with eviction of least recently used key
- Extremely common design+coding hybrid
- Relevant areas: Dsa, Design
- Use the answer to connect the concept back to a realistic production or interview scenario for 'Explain LRU cache design.'
Comparison / Tradeoffs
| Aspect | Notes |
|---|---|
| Core idea | Hash map + doubly linked list (or OrderedDict): O(1) get/put with eviction of least recently used key. |
| Practical tradeoff | Extremely common design+coding hybrid. |
Explanation
Summary
Extremely common design+coding hybrid.
Longer Answer
Extremely common design+coding hybrid. Focus on the practical implications across Dsa, Design.
Key Points
- Extremely common design+coding hybrid
- Focus on the practical implications across Dsa, Design
- Relevant areas: Dsa, Design
- Use the answer to connect the concept back to a realistic production or interview scenario for 'Explain LRU cache design.'
Comparison / Tradeoffs
| Aspect | Notes |
|---|---|
| Core idea | Extremely common design+coding hybrid. |
| Practical tradeoff | In an interview, relate 'Explain LRU cache design.' to implementation decisions, tradeoffs, and operational impact. |
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