☁️ CLOUD COMPUTING — INTERVIEW PREP ☁️
Whether you're prepping for your next tech interview or just brushing up on the fundamentals, cloud computing questions almost always come up. Here are 3 that every recruiter loves to ask 👇
Q1. What is the difference between IaaS, PaaS, and SaaS? 💡 Think in layers — what does the provider manage, and what do you manage?
A1: IaaS (Infrastructure as a Service) — you get raw servers, storage, and networking; you manage the OS, apps, and everything above it. (e.g., AWS EC2, Azure VMs)
PaaS (Platform as a Service) — the provider also manages the OS and runtime; you just focus on your code. (e.g., Google App Engine, Heroku)
SaaS (Software as a Service) — everything is managed for you; you just use the app. (e.g., Gmail, Dropbox)
Q2. What is auto-scaling, and why does it matter? 💡 Think about what happens when traffic suddenly spikes — like during a flash sale.
A2: Auto-scaling automatically adds or removes computing resources (servers) based on real-time demand. It matters because it keeps applications fast during traffic spikes and saves money during low-traffic periods, without needing a human to manually adjust anything.
Q3. What's the difference between horizontal and vertical scaling? 💡 One adds more machines, the other makes one machine stronger — which is which?
A3:Vertical scaling = adding more power (CPU/RAM) to an existing machine. Simple, but has a hardware limit.
Horizontal scaling = adding more machines to share the load. More complex to manage, but scales almost limitlessly — this is how most modern cloud apps grow.
💬 Which question would you have struggled with? Let us know in the comments!
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