Scalability: A system’s ability to handle more users or data by adding resources, without slowing down or breaking.
Example
During a big sale, the shopping site grows from 5 to 50 servers to handle the extra traffic.
Why Scalability matters for IT interns
It is a common interview topic, and it explains many design decisions in real projects.
Where you will hear it
You will hear this term when your team builds, deploys, and runs software on servers and cloud platforms. If someone uses it and you are not sure what they mean in your project, it is completely fine to ask; every team uses terms a little differently.
Related terms
- Google Cloud: Google’s cloud platform (often called GCP), with services for computing, storage, data analytics and AI.
- Kubernetes: A system for running and managing many containers across many servers — starting them, restarting failed ones…
- Microsoft Azure: Microsoft’s cloud platform, offering services such as virtual machines, databases, storage and AI tools.
- Monitoring: Continuously tracking an application’s health — errors, speed and usage — and alerting the team when…
- Server: A computer, physical or virtual, that provides a service to other computers — such as running a website, an…
- Virtual Machine (VM): A software-based computer that runs on a physical server, with its own operating system, as if it were a…
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Frequently asked questions
What is Scalability?
A system’s ability to handle more users or data by adding resources, without slowing down or breaking.
What is an example of Scalability?
During a big sale, the shopping site grows from 5 to 50 servers to handle the extra traffic.
Why does Scalability matter for IT interns?
It is a common interview topic, and it explains many design decisions in real projects.
Explore more internship terms
The IT Internship Glossary explains 199 terms you will hear before and during your internship, with simple definitions and real examples.
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About the author
Dhaivat has 16+ years of experience in the IT industry, working on AI and cloud technologies, project delivery, and engineering leadership. He has interviewed and mentored many interns, wrote The Lost Intern, and runs the non-commercial Career Impact Initiative, mentoring students for free.