Each design choice is good for some use case and not-so-goodįor other scenarios. What different design options are there, what the trade-offs are for each of the design options.ĭiscuss in details WHY you are taking certain design decisionĪnd WHY you think one decision option is better (or worse) than the other and what you are gaining or compromising You are advising your interviewer on what you think the design should be for the system so that is scales, Of different design choices you might have for the system and what the trade-offs are for different design choices.So basically What you think about how the system can be designed keeping the customer requirements in mindĪnd you will also want to give your customer a walk-through System and then you will quickly try to give your customer a consultation on So you will try to know what your customer has in mind for the This is your first meeting with your customer and your goal is to know everything about the system that Your mindset should be as if you are a consultant and your interviewer is You go with, what is important is if you understand the trade-offs and bottelenecks of each design option.Ī productive System Design interview starts with intervieweeĪsking a lot of clarifying questions to the interviewer. It is because, it is not important what design Your interviewer would often encourage you to just choose of your described design choicesĪnd move forward with the rest of design discussion. Understand the pros and cons of each of the design options. What are your reasonings are behind each of the design choices you are makingĪnd whether you are exploring multiple design options and You interviewer is really trying to find out SQL DB or NoSQL DB, you need to talk in details whether you are gonna use SQL DB or NoSQl DB or a hybrid model, and why and what are the For example, if you are deciding what kind of storage you are going to useĪnd are making a design decision between whether you are going to use So make sure every design choice you make, you discuss trade-offs and bottlenecks, and THE REASON behind What design decision you are taking and WHY you are leaning towards one design choice vs the other. How many design choices you are presenting, and what trade-offs you are making in each of theseĭesign choices, pros and cons of each design choice, What your interviewer is interested in knowing is WHAT your design is for the system that you are building. In a System Design interview, your interviewer is not interested in knowing What I am going to say next is probably the most important thing to know before your That can actually be used in a real-world production grade project. As in all other chapters, we will design this system in a way In this chapter, I will show you how you can design a scalable URL Shortener system keeping industry standard inĭesign interview. Interesting Discussion – show advanced or unique edge cases – validate your assumptions and.Know Why – Defending design tradeoffs is critical. Consider the customer – is this a good experience? What purpose does it serve?ĭrive the conversation by asking great questions and validating assumptions.Be a Consultant – imagine your interviewer is a customer you’ll be building something for, consider a tangible system, from requirements to post-production, and what that means.General advice for System Design Interview
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