Cloud Computing

Delivering computing resources over the internet — service models and deployment types.

📖 ~4 min read 💻 RRB NTPC / Group D — Computer Awareness

Cloud computing is the delivery of computing services (storage, servers, software) over the internet, instead of relying on local hardware.

Model	Full Form	Provides
IaaS	Infrastructure as a Service	Virtualised computing resources (servers, storage)
PaaS	Platform as a Service	A platform for developing/running applications
SaaS	Software as a Service	Ready-to-use software accessed via the internet (e.g., Gmail, Google Docs)

Public Cloud: Services offered over the public internet, shared across organisations
Private Cloud: Dedicated to a single organisation
Hybrid Cloud: Combination of public and private cloud

💡 Examples of cloud providers: Amazon Web Services (AWS), Microsoft Azure, Google Cloud Platform

This free chapter covers the key concepts. For complete coverage with 500+ MCQs, mock tests, and previous year analysis — grab the premium eBook.