LLD - Advanced LLD ConceptsIn an LLD review, if a method is documented as getData(): List but the implementation returns a Map, what is the likely outcome?APerformance optimizationBDesign inconsistency errorCNo issue, both are collectionsDSyntax error in codeCheck Answer
Step-by-Step SolutionSolution:Step 1: Compare documented and actual return typesDocument says List, implementation returns Map, types differ.Step 2: Identify impact of mismatchThis causes inconsistency between design and code, leading to errors or confusion.Final Answer:Design inconsistency error -> Option BQuick Check:Return type mismatch = A [OK]Quick Trick: Match documented and implemented types exactly [OK]Common Mistakes:MISTAKESIgnoring type mismatchesAssuming collections are interchangeableOverlooking documentation accuracy
Master "Advanced LLD Concepts" in LLD9 interactive learning modes - each teaches the same concept differentlyLearnWhyDeepArchTryChallengeDesignRecallScale
More LLD Quizzes Advanced LLD Concepts - Anti-patterns to avoid - Quiz 9hard Design โ Food Delivery System - Restaurant, Menu, Order classes - Quiz 3easy Design โ Food Delivery System - Restaurant, Menu, Order classes - Quiz 10hard Design โ Food Delivery System - Delivery agent assignment - Quiz 13medium Design โ Food Delivery System - Notification to all parties - Quiz 4medium Design โ Food Delivery System - Restaurant, Menu, Order classes - Quiz 4medium Design โ Hotel Booking System - Hotel, Room, Booking classes - Quiz 4medium Design โ Online Shopping Cart - Product, Cart, Order classes - Quiz 2easy Design โ Online Shopping Cart - Notification on state change - Quiz 5medium Design โ Splitwise (Expense Sharing) - Why Splitwise tests financial logic - Quiz 13medium