Cloud Storage and Online Collaboration Tools: Full Notes

Cloud storage means keeping files on servers owned by a service provider and reaching them over the internet from any device, instead of keeping them only on the hard disk of one computer. Online collaboration tools sit on top of that storage and let several people read, edit and comment on the same document at the same time. Computer Awareness papers in banking, SSC and railway exams now treat this as a core chapter, and the questions are mostly about names, full forms, service models and the Indian government schemes built on the cloud.

What the cloud really is

Cloud computing is the delivery of computing services such as servers, storage, databases, networking and software over the internet on a pay-as-you-use basis. The provider owns large data centres, divides each physical machine into many virtual machines using software called a hypervisor, and rents those resources to thousands of customers at once, a design called multi-tenancy. The National Institute of Standards and Technology of the United States describes five essential characteristics of the cloud: on-demand self-service, broad network access, resource pooling, rapid elasticity and measured service. The quality a customer is promised, such as uptime, is written into a Service Level Agreement.

Service models and deployment models

By deployment, a cloud may be public, open to anyone who pays; private, built for a single organisation; hybrid, a mix of the two where sensitive data stays private; or community, shared by organisations with common needs such as a group of banks.

The main cloud storage services

Online collaboration tools

Collaboration suites combine storage with editing and communication. Google Workspace brings together Drive, Docs, Sheets, Slides and Meet, while Microsoft 365 brings Word, Excel, PowerPoint, Teams, SharePoint and OneNote. Video conferencing is handled by tools such as Microsoft Teams, Zoom, Google Meet and Cisco Webex; team messaging by Slack; project boards by Trello, Asana and Jira; and software code by GitHub, which uses the version control system Git. Three features define real collaboration: simultaneous editing, where several people type in the same file; version history, which keeps every earlier draft so changes can be rolled back; and permission levels, usually viewer, commenter and editor, set through a shared link.

Cloud in Indian governance

The government runs its own cloud so that departments need not buy separate servers. MeghRaj is the GI Cloud initiative of the Government of India, under which the National Informatics Centre runs the National Cloud for central and state departments. DigiLocker, launched in 2015 as part of the Digital India programme of the Ministry of Electronics and Information Technology, gives every citizen a cloud account linked to Aadhaar in which issuers such as the CBSE, transport departments and universities place documents that are accepted on a par with originals. Related services include eSign for digital signatures and e-Office for paperless files.

Advantages, risks and vocabulary

The gains are clear: files are reachable from any device, teams work on one copy instead of mailing attachments, storage can be increased instantly, and data survives the loss of a laptop. The risks are equally examinable: nothing works without an internet connection, data stored abroad raises questions of privacy and data sovereignty, moving away from a provider is costly, a condition called vendor lock-in, and a weak password exposes everything at once. Providers answer with encryption in transit through HTTPS, encryption at rest on their disks, two-factor authentication and redundant copies in more than one data centre, while users are advised to follow the backup rule of keeping three copies of important data on two kinds of media with one copy off-site.