LLD - Design — Food Delivery System
Which data structure is best suited to store individual reviews for quick lookup by product ID?
Which data structure is best suited to store individual reviews for quick lookup by product ID?
easy📝 Conceptual Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Consider lookup efficiency
Quick lookup by product ID requires a data structure with fast key-based access.Step 2: Choose appropriate structure
A hash map (dictionary) allows O(1) average time to find reviews by product ID.Final Answer:
Hash map with product ID as key and list of reviews as value -> Option AQuick Check:
Fast lookup = Hash map [OK]
Quick Trick: Use hash maps for fast key-based lookup [OK]
Common Mistakes:
- Using arrays without indexing causes slow searches
- Linked lists have O(n) lookup time
- Stacks do not support direct lookup by key
Master "Design — Food Delivery System" in LLD
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore LLD Quizzes