Tech Fundamentals

Cloud Infrastructure 101: IaaS, PaaS, and SaaS in Action Cloud services come in three common models. IaaS, PaaS, and SaaS help teams control, deploy, and use software in different ways. Understanding who handles what makes it easier to design solutions that fit goals and budgets. IaaS: Infrastructure as a Service IaaS offers raw computing resources—virtual machines, storage, and networks. You install and manage the operating system, middleware, and applications. The provider takes care of the physical servers, power, and cooling. This model gives you the most control, but also the most responsibility. ...

Databases explained: from relational to NoSQL Databases store data so apps can read and update it quickly. The two main families are relational databases and NoSQL systems. Both have their strengths, and many apps use both in a hybrid approach. In a relational database, data lives in tables. Each table has rows and columns, and a predefined schema controls what data fits. SQL lets you join tables, filter, and sort. The system offers strong guarantees called ACID: Atomicity, Consistency, Isolation, and Durability. This makes complex queries reliable, but it can slow down at very large scale or with unpredictable data. ...