Low Level Designs
Introduction to OOP & LLD High level Design HLD Deals with different infrastructure layers that are going to work together for efficient working of a system. Load balancer, appln servers, DB, Cache Low Level Design(Object oriented design) Deals with details/implementation of software/code that is running A research says that an software engineer only spends 12% of time doing coding. Other 88% goes in other productive things like meetings, reviews, testing, automation. LLD helps make better use of 88% of time LLD includes Readable & understandable Requirement gathering Extensible system -> easy to add new features Maintainable system -> Easy to keep current system(w/o new requirements) working. Bugs/updates/3rd party library changes, Programmatic Paradigm Procedural -> C Set of instructions(Function), Action is performed on Entities(in real world Entities perform action) Any procedure can play around with entity attributes Object Oriented -> Java, Python, JS, c#...