Hld System Design Easy

WatchTower: Global Uptime Monitor

Design a service similar to Pingdom that monitors website uptime from 10 different global regions. Users configure a URL and an interval (e.g., every 1 minute). If a site is down from 3+ regions, trigger an alert.

Key concepts

distributed probingaggregationalerting

Practise this out loud — free

Start a mock interview on THIS exact question — a voice AI interviewer opens with it, pushes back like a real onsite, then hands you an instant scorecard.

🎙 Practise this question now

Part of Praxari's verified interview question bank. We show the prompt and concepts to practise with — never a copy-paste solution.