6 min read Booking.com connects 28+ million accommodation listings with hundreds of millions of travelers. Designing an online travel agency (OTA) tests your […] Read article
6 min read Splitwise tracks shared expenses among friends, roommates, and travel groups — helping millions of users settle debts fairly. Designing an Read article
7 min read GitHub Copilot and similar AI code assistants (Cursor, Codeium, Amazon CodeWhisperer) generate code suggestions in real-time as developers type. Designing Read article
7 min read SQL is tested at virtually every backend, data engineering, and data science interview. Beyond basic SELECT statements, interviewers test: window Read article
7 min read C++ remains essential for systems programming, game engines, high-frequency trading, embedded systems, and performance-critical applications. C++ interviews at companies like Read article
6 min read Enterprise search powers knowledge discovery within organizations — searching across documents, messages, code, and wikis. Unlike web search (rank by Read article
7 min read Rust is the language of systems programming, WebAssembly, and performance-critical applications. Used at AWS (Firecracker), Cloudflare (Workers), Discord, and Dropbox. Read article
6 min read Go is the language of cloud infrastructure — powering Kubernetes, Docker, Terraform, and most modern backend services at companies like Read article
7 min read JavaScript is the language of the web, powering frontend (React, Vue), backend (Node.js, Deno, Bun), and full-stack applications. TypeScript has Read article
7 min read Java remains the dominant language for enterprise backend systems, powering services at Google, Amazon, Netflix, and most Fortune 500 companies. Read article
8 min read TL;DR — Python interviews in 2025 test whether you can explain and apply the language’s internals — generators, decorators, async/await, type Read article
7 min read Responsible AI is increasingly tested in ML interviews as companies face regulatory pressure, public scrutiny, and genuine ethical concerns about Read article
6 min read Real-time analytics platforms like Amplitude, Mixpanel, and Google Analytics process billions of events per day to provide instant insights: funnels, Read article
6 min read AI agents are LLMs that can reason, plan, and take actions in the world — calling APIs, querying databases, writing Read article
5 min read A/B testing is the gold standard for measuring the impact of product changes and ML model deployments. Understanding experiment design, Read article
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