Interview Prep Guides

Deep-dive guides on system design, top-tier tech interview prep, and AI-era engineering — grounded in how these interviews actually run.

Guides: 23
Reading: 3 h

Technical GuideAug 9, 202610 min readFeatured

Message Queues in System Design Interviews: When to Add One and What Breaks

When to add a message queue, what redelivery actually means, why exactly-once is a myth, and the backlog question interviewers use to separate real experience from reading.

Message Queues
System Design
Distributed Systems
Asynchronous Processing

Showing all 22 guides

Technical Guide8 min readSLOs, SLIs and Error Budgets: The Reliability Questions Every SRE Interview AsksWhat an SLO actually commits you to, how error budgets change release decisions, and how to set a target for a service that has never had one. With practice questions.Aug 8, 2026SREReliability
Technical Guide7 min readLLM Evaluation Interview Questions: How to Prove a Model Change HelpedHow to evaluate LLM and RAG systems in an interview: splitting retrieval from generation, the biases in LLM-as-judge, regression gates, and what to measure in production.Aug 7, 2026AI EngineeringLLM
Technical Guide7 min readLoad Balancer Interview Questions: The Parts Candidates SkipL4 versus L7, choosing a distribution algorithm, why deep health checks cause outages, and what happens to in-flight connections during a deploy. With practice questions.Aug 6, 2026System DesignNetworking
Technical Guide7 min readp95, p99 and Tail Latency: What Interviewers Mean When They Ask About PercentilesWhy averages hide outages, what p99 actually measures, why tail latency gets worse with fan-out, and how to answer percentile questions in a system design interview.Aug 5, 2026System DesignPerformance
Interview Tips6 min readSystem Design Interview Preparation in India: What Changes After SDE-2Why DSA-heavy preparation stops working at senior levels, what the design round actually scores, and how to structure practice for FAANG India interviews.Aug 4, 2026System DesignCareer
Technical Guide14 min readVector Database Interview Questions: From HNSW to Billion-Scale ServingWhat interviewers actually probe when they ask about vector search: index choice, the recall dial, metadata filtering, capacity math, and rebuilds. With practice questions.Aug 2, 2026Vector DatabasesSystem Design
Interview Tips10 min readGoogle L5 System Design: What Interviewers Actually EvaluateThe Google L5 system design bar, explained: scope ownership, the numbers-first habit, tradeoffs under pushback, and the L4-to-L5 gap that decides down-levels.Aug 1, 2026GoogleSystem Design
Interview Tips13 min readSystem Design Interview Prep in 2026: Static Courses vs Interactive PracticeAn honest comparison of system design prep formats in 2026 — reading courses, video libraries, mock interviews, and interactive practice — and how to choose.Jul 23, 2026System DesignPrep Strategy
Technical Guide10 min readNALSD Interviews: Non-Abstract Large System Design, Explained with a Worked ExampleWhat NALSD means, how Google SRE runs non-abstract large system design interviews, the iteration ladder, and a fully worked numbers-first design example.Jul 22, 2026System DesignNALSD
Technical Guide10 min readBack-of-the-Envelope Estimation for System Design Interviews: Formulas, Worked Examples, and Latency NumbersThe capacity estimation formulas interviewers expect — QPS, storage, bandwidth, cache sizing — with worked examples, latency numbers, and fast rounding tricks.Jul 18, 2026System DesignEstimation
Interview Tips8 min readThe 10 Behavioral Questions That Decide Senior Engineering Interviews (and How to Structure Answers)The behavioral questions asked in nearly every senior software engineer loop at Meta, Amazon, and Google — what each one tests, and answer structures that survive follow-ups.Jul 17, 2026Behavioral InterviewSTAR Method
Technical Guide10 min readDesign a RAG System: The Complete System Design Interview WalkthroughDesign a RAG system is the most-asked AI system design question in 2026. This walkthrough covers ingestion, chunking, hybrid retrieval, reranking, grounding, evaluation, and the follow-ups interviewers use.Jul 7, 2026RAGSystem Design
Interview Tips7 min readAI Engineer Interview Questions in 2026: What's Actually Asked (and How to Practice)The five topic clusters AI engineer interviews test in 2026 — LLM fundamentals, RAG, agents, evals, and AI system design — with real question examples and hands-on practice for each.Jul 6, 2026AI EngineerLLM
Technical Guide9 min readAgentic AI System Design Interviews: Agents, Tools, Memory, and GuardrailsAI agent questions are entering system design loops fast. This guide covers agent architecture — orchestration, tool calling, memory, guardrails, multi-agent coordination — the way interviewers probe it.Jul 5, 2026AI AgentsSystem Design
Company Guide12 min readAmazon Leadership Principles Interview: Questions and Answer Structures That Actually WorkAmazon's behavioral round is scored against 16 Leadership Principles. Example questions for all 16 LPs, STAR answer structures, and how to pass the bar raiser.Jul 4, 2026AmazonLeadership Principles
Company Guide7 min readAnthropic's Values Round: Why Strong Engineers Fail It and How to PrepareCandidates consistently report the values round as the hardest part of Anthropic's interview loop — and its most common failure point. What it is, the questions asked, and how to prepare honestly.Jul 3, 2026AnthropicValues Interview
Company Guide9 min readOpenAI and Nvidia System Design Interviews: The AI Infrastructure Questions Nobody Prepares ForOpenAI and Nvidia have some of the most technically demanding system design interviews in the industry. This guide covers GPU scheduling, distributed training infrastructure, vector databases, and the specific questions these companies ask.Jun 28, 2026OpenAINvidia
Interview Tips9 min readThe Most Overlooked Part of a System Design Interview: Clarifying Questions That Win OffersMost candidates jump straight to drawing architecture diagrams. The ones who get offers start by asking the right clarifying questions. Here is exactly what to ask, why it matters, and how to practise this skill effectively.Jun 25, 2026Clarifying QuestionsSystem Design
Interview Tips8 min readFAANG System Design Interview Questions in 2026: What's Actually Being AskedA comprehensive guide to system design interview questions at FAANG companies (Facebook/Meta, Apple, Amazon, Netflix, Google) in 2026 -- what has changed, what interviewers look for, and how to structure your answers.Jun 22, 2026FAANGSystem Design
Technical Guide8 min readLLM Inference System Design: A Complete Interview Guide for AI-Era CompaniesA technical deep-dive into designing LLM inference platforms for system design interviews at Anthropic, OpenAI, Nvidia, and other MANGOS companies. Covers KV caching, batching, streaming, GPU scheduling, and fault tolerance.Jun 18, 2026LLM InferenceKV Cache
Company Guide8 min readAnthropic System Design Interview: What to Expect and How to Prepare in 2026A detailed guide to Anthropic's engineering interview process, with a focus on system design. Covers what Anthropic looks for, the types of questions asked, safety-aware design thinking, and how to prepare effectively.Jun 15, 2026AnthropicSystem Design
Company Guide7 min readWhat is MANGOS? The New Elite Tech Company Tier Alongside FAANG ExplainedMANGOS stands for Meta, Anthropic, Nvidia, Google, OpenAI, and SpaceX -- the AI-era generation of elite tech companies that have redefined what top-tier means in 2026. Here is what it means for your career and interview prep.Jun 10, 2026MANGOSFAANG