Critical Low-Level Design Interview Questions

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[{"selector":"#anim-97c5d74c-cd21-4af2-9bc1-dee5123f38c1","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-c7145b57-a492-49bf-a87b-ae1b94d17e02","keyframes":{"transform":["translate3d(0px, -657.55325%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-bf80d341-ceb2-47bf-accd-0eeb39a87c60 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(14.849955656084243%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] Explain object-oriented design principles. Can you demonstrate how you would apply them in a coding problem? Looking for more Low-level Design Interview Questions to Prepare for? Click here

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[{"selector":"#anim-792e9327-23f8-4fa2-8737-77c14b7e2aab [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(7.868525640762189%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-13ccbf81-5298-4d98-9638-c18db642a309","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-f1e76c1e-4d27-42b5-a6c2-0ce12da0537a","keyframes":{"transform":["translate3d(0px, -863.41878%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] How would you design a URL shortening service like bit.ly from scratch? Looking for more Low-level Design Interview Questions to Prepare for? Click here

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[{"selector":"#anim-fb8343b9-e93c-4e06-822e-3cb4ea7b5d5d [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(7.817772522442576%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-f096f977-658a-45db-9be3-4d824a52b290","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-f591aef9-9458-4aa2-93b5-bc2f6fe31696","keyframes":{"transform":["translate3d(0px, -657.55325%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Design a rate limiter. What data structures & algorithms would you use, & how would you handle distributed systems scenarios? Looking for more Low-level Design Interview Questions to Prepare for? Click here

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[{"selector":"#anim-8aac9d20-7ae6-49c9-a2a1-edd3f2ddfc26","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-91569c93-b013-43ad-ae55-63051f47218f","keyframes":{"transform":["translate3d(0px, -657.55325%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-e1359838-aef4-4377-a975-a83a4e7df2da [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(12.499999772451451%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] Can you walk through the low-level design of a chess game, focusing on the classes and interfaces you would create? Looking for more Low-level Design Interview Questions to Prepare for? Click here

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[{"selector":"#anim-a65b3a84-3d23-45ca-88c9-81ff203d2750 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(7.868525640762189%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-8c4db84d-56fe-42c0-8f62-3f406d8d08c3","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-1bccd414-112f-49a0-96da-478b8fc31b53","keyframes":{"transform":["translate3d(0px, -657.55325%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Explain the differences between SQL and NoSQL databases. When would you choose & over the other in system design? Looking for more Low-level Design Interview Questions to Prepare for? Click here

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[{"selector":"#anim-355e98ad-ac18-4b62-825c-6f1e21dfc266","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-7961ef9a-e44b-4bb3-8db3-6260abd97965","keyframes":{"transform":["translate3d(0px, -875.34702%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-09865bb3-cbe1-4ac5-97d0-7f432c7d8943 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(7.812499744007886%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] How would you implement a concurrent HashMap in Java? Looking for more Low-level Design Interview Questions to Prepare for? Click here

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[{"selector":"#anim-a20eddfa-6426-43b9-adb7-3e7d2505c5b5 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(7.868525640762189%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-b7f68b95-5620-4a00-9bab-3602730046e5","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-5d35de9a-5587-4973-a6bc-05fa15ab063f","keyframes":{"transform":["translate3d(0px, -657.55325%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Design an ATM machine. What are the classes and functions you would need? How would you handle concurrency? Looking for more Low-level Design Interview Questions to Prepare for? Click here

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[{"selector":"#anim-667efe97-24da-4b94-810b-b872f7a612d9","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-d9ab237f-482a-4fb4-91d3-ec6e90f9b517","keyframes":{"transform":["translate3d(0px, -658.67683%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-7476cb80-5535-4ea1-b809-6f411b9344cd [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(13.360495214439528%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] Describe how memory management works in C++. How would you prevent memory leaks in a large-scale application? Looking for more Low-level Design Interview Questions to Prepare for? Click here

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[{"selector":"#anim-aadb404e-5a17-4208-a97d-244918ddbf49 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(7.812499744007886%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-67d6a5c6-beec-461a-9880-591a9508d9b0","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-79e5fcf7-3799-4524-a3a5-0400b69ea73d","keyframes":{"transform":["translate3d(0px, -876.9095%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] How would you design an autocomplete system for a search engine? Looking for more Low-level Design Interview Questions to Prepare for? Click here

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[{"selector":"#anim-89da9858-b8b5-4777-88e1-02b1d3793b5c","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-002bdc71-3921-416a-bbe8-2cc5cecd1f49","keyframes":{"transform":["translate3d(0px, -658.67683%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-7cb9312f-ea01-40d8-8c17-5a9740298290 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(7.812499744007886%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] What is a deadlock and how would you avoid or resolve deadlocks in a multi-threaded application? Looking for more Low-level Design Interview Questions to Prepare for? Click here

11

[{"selector":"#anim-700f11e8-bf65-446c-bf9e-7110bfe4c40d","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-301aaae9-bcd8-47f8-ae80-d83074e15c05","keyframes":{"transform":["translate3d(0px, -876.9095%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-0dd92efb-31e3-40d8-bad9-a32f1f1ed92c [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(7.812499744007886%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] Explain the Singleton design pattern and provide a real-world example of its use. Looking for more Low-level Design Interview Questions to Prepare for? Click here

12

[{"selector":"#anim-fcaec48e-a8a0-4839-8438-f7f3a8fc9304","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-ba8ff918-ea25-4385-9a64-fc89ddde67db","keyframes":{"transform":["translate3d(0px, -658.67683%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-23e8548b-ccfc-4303-af36-5be566a6ea22 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(7.868525640762189%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] Discuss the LRU (Least Recently Used) Cache mechanism. How would you implement it? Looking for more Low-level Design Interview Questions to Prepare for? Click here

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[{"selector":"#anim-8ffbd028-f8f8-480a-8025-9c91c4240dc1","keyframes":{"opacity":[0,1]},"delay":0,"duration":1000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-05cd94cf-671e-42a5-a0f4-234c08435da6","keyframes":{"transform":["translate3d(0px, -327.95415%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-c5987d3c-b923-4113-85b9-ddf0875ceebf","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-3156a524-0b13-4d7e-bde6-705cace38abb","keyframes":{"transform":["translate3d(0px, -504.97361%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Ready to take the Next Step in your Career? SWIPE UP

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[{"selector":"#anim-9aa29cbf-471c-4775-9693-1fae5563c5c4","keyframes":{"opacity":[0,1]},"delay":0,"duration":1000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-978bccdf-8e7e-43ec-a006-492d00054734","keyframes":{"transform":["translate3d(0px, -257.09878%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-abf3fec0-2d76-4a93-9f93-ec7f3d7bf1a3","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-9e81f825-c7e9-430d-9824-f45792b9f915","keyframes":{"transform":["translate3d(0px, -305.55559%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Improve your Interviewing Skills with Scaler! SWIPE UP

Critical Low-Level Design Interview Questions

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