Where can I practice technical interview questions for free in India?

SkillVeris offers a free interview questions section with readiness scoring, so you can practice technical interview questions at no cost from anywhere in India or worldwide. Questions span AI/ML, programming, web development, DevOps, cloud and security. Combine them with Code Lab for hands-on coding practice and the AI Mentor for instant explanations whenever an answer confuses you.

How do I prepare for a coding interview if I am a complete beginner?

Start by learning one language well, then practice small problems daily before attempting interview questions. On SkillVeris you can take a free structured programming course with 24–40 lessons, write code in the in-browser Code Lab across 6 languages, and then move to the interview questions bank with readiness scoring to measure how prepared you actually are.

What is interview readiness scoring and how does it work?

Interview readiness scoring measures how prepared you are for a technical interview based on your performance across practice questions. On SkillVeris, as you answer interview questions, your readiness score updates so you can see weak topics before the real interview. It turns vague confidence into a concrete signal, telling you which areas need more revision and which are already strong.

How long does it take to get interview ready for a developer job?

Most beginners need a few months of consistent practice to feel interview ready, though timelines vary with background and daily study time. A practical route is finishing a structured SkillVeris course, which includes 24–40 lessons, module assessments and a final exam at an 80 percent pass mark, then drilling the free interview questions until your readiness score is consistently strong.

What are the most common technical interview topics for freshers?

Freshers are commonly tested on programming fundamentals, data structures, problem solving, databases, and basics of the role's stack such as web development or cloud. SkillVeris covers these through 37 free courses, a glossary of around 2,000 terms for quick definitions, cheat sheets for revision, and interview questions with readiness scoring so you can practise exactly what interviewers usually ask.

Can I practice coding interview prep without installing anything?

Yes, SkillVeris Code Lab runs entirely in your browser, so you can practice coding interview prep without installing compilers or editors. It supports 6 languages across 15 categories of exercises. Pair Code Lab sessions with the interview questions bank and readiness scoring, and you have a complete free preparation setup that works on any machine with an internet connection.

How do I explain technical concepts clearly in an interview?

Practice explaining each concept through a simple analogy first, then add the technical detail, because interviewers value clarity over jargon. SkillVeris teaches with its Learn Through Hobbies method, explaining concepts through cricket, music, gaming, cooking and eight more domains. Learning a topic through an analogy gives you a ready-made, memorable way to explain it when an interviewer asks.

Are there free mock interview resources for software engineers?

SkillVeris provides free interview questions with readiness scoring, which works like a self-paced mock interview you can repeat any time. You answer real-style technical questions, get scored, and see where you stand. The AI Mentor is available 24/7 to explain any answer at Quick, Detailed or Deep-dive depth, acting like an always-available interviewer who never gets tired.

How should I prepare for an AI or machine learning interview?

Cover ML fundamentals, Python, and modern topics like LLMs and RAG, then practise explaining projects clearly. SkillVeris has free AI/ML courses including Python for AI and ML, Large Language Models and Retrieval-Augmented Generation, each with 24–40 lessons and assessments. After finishing, use the interview questions bank and readiness scoring to confirm you can answer under pressure.

What should I revise the night before a technical interview?

Revise concise summaries rather than learning anything new: core definitions, common patterns, and your own project stories. SkillVeris cheat sheets and study notes are built exactly for this kind of quick revision, and the glossary of around 2,000 terms lets you verify any definition fast. A short readiness-score check on the interview questions bank confirms nothing critical is shaky.

How do I prepare for a DevOps interview with no work experience?

Build demonstrable knowledge through structured learning and hands-on practice, since you cannot point to job experience. SkillVeris offers free DevOps, Docker and Kubernetes related courses within its 37-course catalog and a DevOps Engineer learning path. Complete the courses, earn certificates by passing the final exams, then use the interview questions section to rehearse common DevOps scenarios.

Do certificates help in clearing technical interviews?

Certificates alone do not clear interviews, but they signal structured learning and give interviewers a starting point for questions. SkillVeris awards certificates when you pass a course final exam at 80 percent, after 24–40 lessons and module assessments, so the certificate reflects genuine effort. Pair it with practised interview answers and Code Lab projects to make a stronger impression.

How can I improve my problem solving speed for coding interviews?

Speed comes from repetition on progressively harder problems, not from rushing. Practise daily in SkillVeris Code Lab, which offers in-browser coding in 6 languages across 15 categories, and time yourself on interview questions. Review every mistake with the AI Mentor, which explains solutions 24/7 at Quick, Detailed or Deep-dive depth, so each session genuinely improves your pattern recognition.

What questions are asked in a Python technical interview?

Python interviews typically cover data types, functions, comprehensions, OOP, error handling and libraries relevant to the role, such as ML packages for AI positions. SkillVeris interview questions include Python topics, and its free Python for AI and ML course builds the underlying knowledge across 24–40 lessons. Readiness scoring then shows whether your Python answers are interview grade.

How do I handle interview questions I don't know the answer to?

Say what you do know, reason aloud toward an approach, and be honest about the gap, because interviewers value thinking over bluffing. Reduce how often this happens by broadening fundamentals: SkillVeris study notes, cheat sheets and the roughly 2,000-term glossary fill knowledge gaps quickly, and readiness scoring highlights weak areas before an interviewer ever finds them.

Is there a free way to check my interview readiness before applying for jobs?

Yes, SkillVeris interview questions come with readiness scoring, all completely free, so you can measure preparation before applying. Once your score looks solid, browse the SkillVeris Jobs page, which aggregates live roles across India, UK, USA, Germany and Remote with salary and experience filters, and apply knowing your technical preparation has been objectively tested.

How do I prepare for web developer interview questions?

Focus on JavaScript fundamentals, your framework of choice, HTTP basics, and building things you can discuss. SkillVeris offers free web development courses among its 37-course catalog, plus a Full Stack Java Developer learning path. After the courses, drill the interview questions bank, practise coding tasks in Code Lab, and use readiness scoring to verify you cover typical frontend and backend topics.

Can the AI Mentor help me practice interview answers?

Yes, the SkillVeris AI Mentor answers questions 24/7 and can explain any concept at Quick, Detailed or Deep-dive depth, which makes it useful for rehearsing interview explanations. Ask it to clarify a topic, then try explaining it back in your own words. Combined with the interview questions bank and readiness scoring, it becomes a free, always-available practice partner.

What is the best free platform for technical interview prep in 2026?

SkillVeris is a strong free option because it combines structured learning with dedicated interview preparation in one place. You get 37 free courses, interview questions with readiness scoring, an in-browser Code Lab for hands-on practice, cheat sheets and study notes for revision, and a 24/7 AI Mentor. Everything is free, which matters for learners in India and worldwide.

How do I stay calm and confident during a technical interview?

Confidence comes from evidence of preparation, so build that evidence deliberately. Complete a SkillVeris course, pass its final exam at the 80 percent bar, and watch your readiness score climb on the interview questions bank. Knowing you have explained concepts through analogies, coded in Code Lab, and scored well on practice questions gives you genuine, grounded calm on the day.

System Design Interview Questions

Scalability, load balancing, caching, microservices and more.

231 questions

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1. What is Load Balancing?
easyScalability 5 mins
2. What is Caching in System Design?
mediumPerformance 6 mins
3. Horizontal vs Vertical Scaling
easyScalability 5 mins
4. What is a CDN (Content Delivery Network)?
easyPerformance 5 mins
5. What is a Message Queue?
mediumAsynchronous Communication 5 mins
6. SQL vs NoSQL for Scale: Which Should You Choose?
mediumData Storage 6 mins
7. What is Rate Limiting?
mediumReliability 5 mins
8. What is Consistent Hashing?
hardDistributed Systems 6 mins
9. What is an API Gateway?
mediumMicroservices 5 mins
10. What is Eventual Consistency?
mediumDistributed Systems 5 mins
11. What is a Microservices Architecture?
mediumArchitecture 5 mins
12. Monolith vs Microservices: What Is the Difference?
mediumArchitecture 5 mins
13. What is a Reverse Proxy?
easyNetworking 4 mins
14. What is Idempotency in System Design?
mediumAPI Design 5 mins
15. How to Design a URL Shortener?
mediumSystem Design Case Study 6 mins
16. Write-Through vs Write-Back Cache: What is the Difference?
mediumCaching Strategies 5 mins
17. What is Database Replication in System Design?
mediumData Storage 5 mins
18. What is a Single Point of Failure (SPOF)?
easyReliability 4 mins
19. What is the Publish-Subscribe (Pub/Sub) Pattern?
mediumMessaging 5 mins
20. How to Design a Rate Limiter?
mediumReliability 5 mins
21. What is Back-of-the-Envelope Estimation?
easyCapacity Planning 4 mins
22. Sharding vs. Partitioning: What is the Difference?
mediumData Storage 5 mins
23. What is Database Indexing at Scale?
mediumData Storage 5 mins
24. What is a Heartbeat in Distributed Systems?
easyDistributed Systems 4 mins
25. How Would You Design a Twitter-Style News Feed?
hardFeed Systems 6 mins
26. How Would You Design Instagram?
hardMedia Platforms 6 mins
27. How Would You Design a WhatsApp-Style Chat System?
hardReal-Time Messaging 6 mins
28. How Would You Design a Ride-Hailing System Like Uber?
hardLocation-Based Systems 6 mins
29. How Would You Design a Video Streaming Platform Like Netflix?
hardStreaming Systems 6 mins
30. How Would You Design YouTube?
hardVideo Streaming 6 mins
31. How Would You Design Dropbox?
hardFile Storage & Sync 6 mins
32. How Would You Design Google Drive?
hardCollaborative Storage 6 mins
33. How Would You Design Ticketmaster?
hardInventory & Concurrency 6 mins
34. How Would You Design a Notification System?
mediumMessaging & Fan-out 5 mins
35. How to Design a Web Crawler
hardDistributed Systems 6 mins
36. How to Design Search Autocomplete (Typeahead)
hardData Structures at Scale 6 mins
37. How to Design a Distributed Cache
hardCaching 6 mins
38. How to Design a Distributed Key-Value Store
hardDistributed Systems 6 mins
39. How to Design a Distributed Message Queue
hardAsynchronous Communication 6 mins
40. How Would You Design a Payment System?
hardPayments & Transactions 6 mins
41. How Would You Design an E-Commerce Checkout Flow?
mediumE-Commerce Systems 5 mins
42. How Would You Design a Stock Exchange Matching Engine?
hardTrading Systems 6 mins
43. How Would You Design a Ride-Matching System?
hardGeospatial Systems 6 mins
44. How Would You Design a Hotel Booking System?
mediumReservation Systems 5 mins
45. How Would You Design a Food Delivery System?
hardMarketplace Systems 6 mins
46. How Would You Design a Distributed Lock?
hardDistributed Systems 6 mins
47. How Would You Design a Distributed Unique ID Generator?
mediumDistributed Systems 5 mins
48. How Would You Design Pastebin?
mediumContent Storage Systems 5 mins
49. How Would You Design a Real-Time Leaderboard?
mediumReal-Time Systems 5 mins
50. How to Design an Ad Click Aggregator
hardData-Intensive Systems 6 mins
51. How to Design a Distributed File System
hardStorage Systems 6 mins
52. How to Design an API Rate Limiter
mediumReliability 5 mins
53. How to Design a Music Streaming Service Like Spotify
hardMedia Streaming 6 mins
54. How to Design a Mapping Service Like Google Maps
hardGeospatial Systems 6 mins
55. How Would You Design Slack?
hardReal-Time Messaging 6 mins
56. How Would You Design Zoom?
hardReal-Time Video 6 mins
57. How Would You Design an Online Code Editor (like Repl.it)?
hardCollaborative Systems 6 mins
58. How Would You Design a Distributed Logging System?
mediumObservability 5 mins
59. How Would You Design a Metrics Monitoring System (like Prometheus)?
mediumObservability 5 mins
60. How Would You Design a Feature Flag System?
mediumRelease Engineering 5 mins
61. How Would You Design a Distributed Job Scheduler?
hardDistributed Systems 6 mins
62. How Would You Design a Large-Scale Email Delivery Service?
mediumMessaging Infrastructure 5 mins
63. How Would You Design a Distributed Counter (e.g. Like Counts)?
mediumDistributed Systems 5 mins
64. How Would You Design a Top-K Trending System?
hardReal-Time Analytics 6 mins
65. How Do You Design a Social Media Timeline?
hardFeed Systems 6 mins
66. How Do You Design a Video Streaming Platform?
hardMedia Delivery 6 mins
67. How Do You Design a Live Streaming Service?
hardReal-Time Media 6 mins
68. How Do You Design a Comment System?
mediumContent Systems 5 mins
69. How Do You Design a Friend Recommendation System?
hardRecommendation Systems 6 mins
70. How to Design an Airline Reservation System?
hardTransactional Systems 6 mins
71. How to Design a Parking Garage System?
mediumReal-Time Resource Allocation 5 mins
72. How to Design an Elevator System?
mediumScheduling Algorithms 5 mins
73. How to Design a Vending Machine System?
easyState Machines 4 mins
74. How to Design an Inventory Management System?
hardDistributed Data Consistency 6 mins
75. How to Design a Shopping Cart Service
mediumE-Commerce Systems 5 mins
76. How to Design a Flash Sale System
hardHigh-Concurrency Systems 6 mins
77. How to Design a Coupon System
mediumE-Commerce Systems 5 mins
78. How to Design a Review and Rating System
mediumContent Systems 5 mins
79. How to Design a Recommendation Engine
hardML Systems 6 mins
80. How to Design a Fraud Detection System
hardReal-Time Risk Systems 6 mins
81. How to Design a Content Moderation System
hardTrust & Safety 6 mins
82. How to Design an Image Upload Service
mediumMedia Infrastructure 5 mins
83. How to Design a Thumbnail Generation Pipeline
mediumMedia Infrastructure 5 mins
84. How to Design a Video Transcoding Pipeline
hardMedia Infrastructure 6 mins
85. How to Design a Log Aggregation System
hardObservability 6 mins
86. How to Design a Distributed Job Queue
hardDistributed Systems 6 mins
87. How to Design a Distributed Cron Scheduler
mediumDistributed Systems 6 mins
88. How to Design a URL Crawler Frontier
hardWeb Crawling 6 mins
89. How to Design a Typeahead Search Service
mediumSearch Systems 5 mins
90. How to Design a News Feed Ranking System
hardRecommendation & Ranking 6 mins
91. How to Design a Chat Presence System
mediumReal-Time Systems 5 mins
92. How to Design a Group Chat System
hardReal-Time Systems 6 mins
93. How to Design a File Sync Service
hardStorage & Sync 6 mins
94. How to Design a Collaborative Document Editor
hardReal-Time Collaboration 6 mins
95. How to Design a Polling System?
mediumReal-Time Data Collection 5 mins
96. How to Design a Survey Platform?
mediumContent & Data Modeling 6 mins
97. How to Design an Ad Serving System?
hardHigh-Throughput Advertising Infrastructure 6 mins
98. How to Design a Bidding System?
hardAuctions & Real-Time Bidding 6 mins
99. How to Design a Real-Time Analytics Dashboard?
hardStreaming Analytics 6 mins
100. What is the CAP Theorem and What Trade-offs Does It Force?
hardDistributed Systems 6 mins
101. What is the PACELC Theorem and How Does It Extend CAP?
hardDistributed Systems 6 mins
102. ACID vs BASE: What’s the Difference and When Does Each Apply?
mediumData Storage 5 mins
103. Strong Consistency vs Eventual Consistency: How Do You Choose?
mediumDistributed Systems 5 mins
104. What is Quorum-based Consensus and How Does It Work?
hardDistributed Systems 6 mins
105. What is the Raft Consensus Algorithm?
hardDistributed Consensus 6 mins
106. What is the Paxos Consensus Algorithm?
hardDistributed Consensus 6 mins
107. How Does Leader Election Work in Distributed Systems?
mediumDistributed Coordination 5 mins
108. What is Two-Phase Commit (2PC)?
hardDistributed Transactions 6 mins
109. What is the Saga Pattern?
mediumDistributed Transactions 5 mins
110. What is CQRS (Command Query Responsibility Segregation)?
hardArchitecture Patterns 6 mins
111. What is Event Sourcing?
hardArchitecture Patterns 6 mins
112. What is a Bloom Filter and When Would You Use One?
mediumProbabilistic Data Structures 5 mins
113. What is a Count-Min Sketch and How Does It Estimate Frequencies?
hardProbabilistic Data Structures 6 mins
114. What is HyperLogLog and How Does It Count Distinct Elements?
hardProbabilistic Data Structures 6 mins
115. What is a Gossip Protocol and How Does It Work?
mediumDistributed Systems 5 mins
116. What are Vector Clocks and Why Are They Used?
hardDistributed Systems 6 mins
117. What are Lamport Timestamps and How Do They Order Events?
mediumDistributed Systems 5 mins
118. How Do You Design for Read-Heavy vs Write-Heavy Systems?
mediumScalability 6 mins
119. What is the Hot Partition Problem and How Do You Fix It?
hardData Partitioning 6 mins
120. What Are Cache Eviction Policies?
mediumCaching 5 mins
121. What Are Cache Invalidation Strategies?
mediumCaching 5 mins
122. What is the Cache-Aside Pattern?
mediumCaching 5 mins
123. What is the Thundering Herd Problem?
hardReliability 6 mins
124. What is Backpressure in Distributed Systems?
hardReliability 6 mins
125. What is the Circuit Breaker Pattern?
mediumResilience 5 mins
126. What is the Bulkhead Pattern?
mediumResilience 5 mins
127. What is Retry with Exponential Backoff?
mediumReliability 5 mins
128. What is a Dead Letter Queue?
mediumAsynchronous Communication 5 mins
129. What are Sticky Sessions in Load Balancing?
mediumLoad Balancing 5 mins
130. How Would You Design a Blob Storage System?
hardStorage Systems 6 mins
131. What Are the Main Data Partitioning Strategies?
mediumData Storage 6 mins
132. Why and How Do You Denormalize Data at Scale?
mediumData Storage 5 mins
133. What is Database Federation and When Do You Use It?
mediumData Storage 6 mins
134. What Are Read Replicas and How Do They Scale Reads?
easyReliability 4 mins
135. What is a Write-Ahead Log (WAL) and Why Do Systems Use It?
mediumStorage Engines 5 mins
136. How Does a Write-Ahead Log Relate to an LSM-Tree?
hardStorage Engines 6 mins
137. How Do You Choose an Indexing Strategy at Scale?
hardDatabase Indexing 6 mins
138. How Does Geospatial Indexing Work for Location-Based Queries?
hardSpecialized Indexes 6 mins
139. How Do You Design a Full-Text Search System?
hardSearch Systems 6 mins
140. What are the Main Database Sharding Strategies?
hardData Partitioning 6 mins
141. How Do You Rebalance Shards Without Downtime?
hardData Partitioning 6 mins
142. What is Service Discovery in Microservices?
mediumMicroservices 5 mins
143. How Would You Design a Service Mesh for Microservices?
hardMicroservices 6 mins
144. What is the Sidecar Pattern in Microservices?
mediumMicroservices 5 mins
145. How Do You Version an API at Scale?
mediumAPI Design 5 mins
146. GraphQL vs REST at Scale: How Do You Choose?
mediumAPI Design 6 mins
147. How Do WebSockets Scale in a Distributed System?
hardReal-Time Systems 6 mins
148. Long Polling vs Server-Sent Events: Which for Real-Time Updates?
mediumReal-Time Systems 5 mins
149. Batch vs Stream Processing: How Do You Choose?
mediumData Pipelines 6 mins
150. What is Lambda Architecture in System Design?
hardData Processing 6 mins
151. What is Kappa Architecture and How Does It Differ from Lambda?
hardData Processing 6 mins
152. Data Lake vs Data Warehouse: What Is the Difference?
mediumData Storage 5 mins
153. How Would You Design an ETL Pipeline?
mediumData Engineering 6 mins
154. What is Distributed Tracing and Why Is It Needed?
mediumObservability 5 mins
155. SLA vs SLO vs SLI: What Is the Difference?
mediumReliability Engineering 5 mins
156. What Do "Nines" of Availability Mean?
mediumReliability Engineering 5 mins
157. How Do You Design a Disaster Recovery Plan?
hardResilience & Recovery 6 mins
158. How Do You Design a Multi-Region Deployment?
hardDistributed Systems 6 mins
159. How Does Blue-Green Deployment Work at Scale?
mediumRelease Engineering 5 mins
160. What Are the Principles of Chaos Engineering?
hardResilience 6 mins
161. What is Load Shedding in System Design?
mediumReliability 5 mins
162. What Are the Main Rate Limiting Algorithms?
mediumReliability 6 mins
163. Token Bucket vs Leaky Bucket: What Is the Difference?
mediumReliability 5 mins
164. Fixed Window vs Sliding Window Rate Limiting: What Is the Difference?
mediumReliability 6 mins
165. How Does Rebalancing Work on a Consistent Hashing Ring?
hardDistributed Systems 6 mins
166. What is Database Connection Pooling and Why Does It Matter?
mediumData Storage 5 mins
167. What is Connection Multiplexing and How Does HTTP/2 Use It?
mediumNetworking 5 mins
168. What is Request Coalescing and How Does It Prevent Cache Stampedes?
mediumCaching 5 mins
169. What is Write Amplification and Why Does It Matter for Storage Engines?
hardData Storage 6 mins
170. What is Read Amplification in Storage Engines?
hardStorage Engines 6 mins
171. What is Space Amplification in Storage Engines?
hardStorage Engines 6 mins
172. What is a Log-Structured Merge (LSM) Tree?
hardStorage Engines 6 mins
173. B-Tree vs LSM-Tree Storage: Which Should You Choose?
hardStorage Engines 6 mins
174. Columnar vs Row Storage: Which Should You Choose?
mediumData Storage 5 mins
175. What Are the Main Data Replication Strategies?
mediumData Replication 5 mins
176. What is Multi-Master Replication?
hardData Replication 6 mins
177. Active-Active vs Active-Passive: What is the Difference?
mediumHigh Availability 5 mins
178. What is the Split-Brain Problem in Distributed Systems?
hardDistributed Systems 6 mins
179. What Are Network Partitions in Distributed Systems?
mediumDistributed Systems 5 mins
180. What is Clock Synchronization in Distributed Systems?
hardDistributed Systems 6 mins
181. How Does NTP Keep Distributed Clocks in Sync?
mediumDistributed Systems 5 mins
182. What are Distributed Transactions and How Do They Work?
hardData Consistency 6 mins
183. What is the Outbox Pattern?
mediumData Consistency 5 mins
184. What is Change Data Capture (CDC)?
mediumData Consistency 5 mins
185. What is Windowing in Stream Processing?
hardStream Processing 6 mins
186. Exactly-Once vs At-Least-Once Delivery: What Is the Difference?
hardMessaging Semantics 6 mins
187. What Are Message Ordering Guarantees?
mediumMessaging Semantics 5 mins
188. How Do You Design a Good Partition Key?
hardDistributed Systems 6 mins
189. Fan-Out on Write vs Fan-Out on Read: Which Should You Use?
hardFeed Architecture 6 mins
190. Push vs Pull Architecture: What Is the Difference?
mediumData Delivery Patterns 5 mins
191. Polling vs Webhooks: When Should You Use Each?
mediumData Delivery Patterns 5 mins
192. API Gateway vs Load Balancer: What Is the Difference?
mediumMicroservices 5 mins
193. What Is Edge Computing Architecture?
mediumDistributed Systems 5 mins
194. What Is Content-Addressable Storage?
hardDistributed Systems 6 mins
195. How Are Merkle Trees Used in Distributed Systems?
hardData Integrity 6 mins
196. How Do You Implement Rate Limiting Across Multiple Servers?
hardReliability 6 mins
197. How Do You Manage User Sessions Across Multiple Servers?
mediumScalability 5 mins
198. How Do You Mitigate Hot Spots in a Sharded System?
hardDistributed Systems 6 mins
199. What is Cell-Based Architecture and Why Does It Improve Reliability?
hardReliability 6 mins
200. What is the Bulkhead Pattern in Microservices?
mediumResilience 5 mins
201. What is the Strangler Fig Pattern?
mediumMigration Strategy 5 mins
202. What is an Anti-Corruption Layer?
hardIntegration Patterns 6 mins
203. What is the Database-per-Service Pattern?
mediumData Ownership 5 mins
204. What is the Shared Database Anti-Pattern?
mediumData Ownership 5 mins
205. What is the API Composition Pattern?
mediumMicroservices Query Patterns 5 mins
206. What is the Backend for Frontend (BFF) Pattern?
mediumMicroservices Query Patterns 5 mins
207. Orchestration vs Choreography in Microservices: What is the Difference?
hardDistributed Workflows 6 mins
208. What are Idempotency Keys in APIs?
mediumAPI Reliability 5 mins
209. How Do You Design Idempotent Writes in a Distributed System?
hardDistributed Data Consistency 6 mins
210. What is Capacity Planning and How Do You Do It?
mediumCapacity & Scale 5 mins
211. How Do You Estimate Traffic for a System Design Interview?
mediumCapacity & Scale 5 mins
212. What is Queueing Theory and Why Does It Matter for System Design?
hardCapacity & Scale 6 mins
213. What is Little’s Law and How Do You Apply It?
hardCapacity & Scale 6 mins
214. Why Does Tail Latency (p99) Matter More Than Average Latency?
mediumPerformance 5 mins
215. Latency vs Throughput: What Is the Trade-off?
mediumPerformance 5 mins
216. What Are the Main Autoscaling Strategies?
mediumScalability 5 mins
217. How Does Horizontal Pod Autoscaling Work in Kubernetes?
mediumContainer Orchestration 6 mins
218. What Causes Database Connection Storms and How Do You Prevent Them?
hardReliability 6 mins
219. What Is the Cold Start Problem in Serverless Computing?
mediumServerless Architecture 5 mins
220. What Are the Trade-offs of Serverless Architecture?
mediumCompute Models 5 mins
221. What Are Edge Caching Strategies?
mediumPerformance & Caching 5 mins
222. What Are Geo-Replication Strategies?
hardDistributed Systems 6 mins
223. What is Active-Passive Failover?
mediumReliability 5 mins
224. What Are Zero-Downtime Deployment Strategies?
mediumDeployment & Release Engineering 5 mins
225. How Would You Design a URL Shortener?
easyWeb Systems 6 mins
226. What Is a Microservice?
mediumArchitecture Styles 6 mins
227. How Would You Design a Real-Time Chat App?
mediumReal-Time Systems 7 mins
228. How Do You Handle a Single Point of Failure?
mediumReliability 6 mins
229. What Is a Webhook and How Does It Work?
hardIntegration Patterns 7 mins
230. What Is Back-Pressure in Distributed Systems?
hardReliability 7 mins
231. How Would You Design a Parking Lot System?
hardObject-Oriented Design 8 mins

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