RezloPrep

Interview PrepLLD

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LLDSystem Design

Low-Level Design & Design Patterns

0% read0 of 148 topics

OOP Fundamentals0/10

Classes & ObjectsSoon

EncapsulationSoon

AbstractionSoon

InheritanceSoon

PolymorphismSoon

Composition vs InheritanceSoon

Association vs Aggregation vs CompositionSoon

Interface vs Abstract ClassSoon

Method Overloading vs OverridingSoon

Dependency InjectionSoon

SOLID Principles0/6

Single Responsibility PrincipleSoon

Open/Closed PrincipleSoon

Liskov Substitution PrincipleSoon

Interface Segregation PrincipleSoon

Dependency Inversion PrincipleSoon

SOLID Violations — Identify and RefactorSoon

UML & Object Modeling0/10

Class DiagramsSoon

Sequence DiagramsSoon

AssociationSoon

AggregationSoon

CompositionSoon

InheritanceSoon

DependencySoon

RealizationSoon

MultiplicitySoon

Designing Classes from RequirementsSoon

Creational Patterns0/13

Factory MethodSoon

Abstract FactorySoon

SingletonSoon

Thread-Safe SingletonSoon

Lazy vs Eager SingletonSoon

BuilderSoon

Step BuilderSoon

PrototypeSoon

Practice: Payment Gateway (Factory)Soon

Practice: Vehicle FactorySoon

Practice: Notification FactorySoon

Practice: Logger (Factory)Soon

Practice: Document/Object BuilderSoon

Structural Patterns0/21

AdapterSoon

Practice: Payment Provider AdapterSoon

Practice: Third-Party API AdapterSoon

DecoratorSoon

Practice: Pizza / Food CustomizationSoon

Practice: Notification EnhancementSoon

FacadeSoon

Practice: Simplified Payment APISoon

Practice: Order Processing FacadeSoon

CompositeSoon

Practice: File SystemSoon

Practice: Organization HierarchySoon

ProxySoon

Virtual ProxySoon

Protection ProxySoon

Remote ProxySoon

Caching ProxySoon

BridgeSoon

Practice: Platform-Independent Notification SystemSoon

FlyweightSoon

Practice: Text Editor / Character RenderingSoon

Behavioral Patterns0/35

StrategySoon

Practice: Payment StrategySoon

Practice: Pricing StrategySoon

Practice: Vehicle/Ride Pricing StrategySoon

ObserverSoon

Practice: Notification SystemSoon

Practice: Stock Price TrackerSoon

Practice: Event Notification SystemSoon

CommandSoon

Practice: Smart HomeSoon

Practice: Undo/Redo SystemSoon

Practice: Transaction CommandsSoon

StateSoon

Practice: Vending MachineSoon

Practice: ElevatorSoon

Practice: Order LifecycleSoon

Chain of ResponsibilitySoon

Practice: ATM / Cash DispenserSoon

Practice: Request Processing PipelineSoon

Practice: Approval WorkflowSoon

Template MethodSoon

Practice: Game FrameworkSoon

Practice: Data Processing PipelineSoon

IteratorSoon

Practice: Custom Collection IteratorSoon

Practice: File System IteratorSoon

MediatorSoon

Practice: Chat RoomSoon

Practice: Air Traffic ControlSoon

MementoSoon

Practice: Undo/RedoSoon

Practice: Game Save StateSoon

VisitorSoon

Practice: File System OperationsSoon

Practice: Object Structure TraversalSoon

DSA-Based Design0/10

LRU CacheSoon

LFU CacheSoon

Rate LimiterSoon

In-Memory Key-Value StoreSoon

In-Memory File SystemSoon

Expiring CacheSoon

Thread-Safe CacheSoon

Priority Queue Based SchedulerSoon

Task SchedulerSoon

Pub/Sub SystemSoon

Machine Coding0/22

Parking LotSoon

Vending MachineSoon

Tic-Tac-ToeSoon

Snake & LadderSoon

Library Management SystemSoon

ATMSoon

Coffee Vending MachineSoon

Elevator SystemSoon

SplitwiseSoon

BookMyShowSoon

Car Rental SystemSoon

Logging FrameworkSoon

Notification SystemSoon

Food Ordering SystemSoon

Payment GatewaySoon

ChessSoon

Spotify / Music PlayerSoon

Zomato / Food DeliverySoon

TinderSoon

Zepto / Inventory ManagementSoon

Chat RoomSoon

Cab/Ride Booking SystemSoon

Concurrency & Thread Safety0/10

Thread-Safe LoggerSoon

Producer-ConsumerSoon

Thread PoolSoon

Blocking QueueSoon

Read-Write LockSoon

Concurrent Rate LimiterSoon

Race ConditionsSoon

DeadlocksSoon

SynchronizationSoon

Atomic OperationsSoon

Clean Code & LLD Practices0/11

Separation of ConcernsSoon

Programming to InterfacesSoon

ImmutabilitySoon

Loose CouplingSoon

High CohesionSoon

DRYSoon

KISSSoon

YAGNISoon

RefactoringSoon

ExtensibilitySoon

TestabilitySoon

Factory Method

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