OS Fundamentals

Demystifying Operating Systems for Modern Workloads Today’s software relies on the operating system to manage CPU time, memory, and I/O. The job of an OS is to keep many tasks running fairly, securely, and with predictable latency. For modern workloads—from HTTP APIs to data pipelines—the OS also becomes a platform for virtualization and isolation. Understanding a few core ideas helps teams optimize performance without chasing every new tool. Key areas to watch are process scheduling, memory management, and I/O handling. Scheduling decides who runs when; memory brings speed and safety; I/O governs how fast data moves in and out. These foundations shape how responsive your services feel under load, and how well they scale. ...

Understanding Operating System Fundamentals for Developers For software developers, understanding how the operating system works helps your code run faster and more reliably. The OS manages hardware resources, memory, and tasks, so your program can focus on its logic. A small change in how you use resources can improve performance and stability. Core ideas for developers Process and threads A program runs as a process, with its own space and resources. A thread is a path of execution inside that process. Several threads share memory, which speeds up communication but can cause data races if not handled carefully. ...

Operating Systems: Scheduling, Memory, and I/O Operating systems coordinate the work of a computer by three core areas: scheduling, memory management, and I/O. Scheduling decides which process runs next on the CPU, memory keeps data and code ready for fast access, and I/O moves data between the computer and devices. A clear design in these areas helps apps feel fast and responsive for users and programs alike. Scheduling CPU scheduling chooses the next task from the ready queue and assigns the CPU. Simple policies work well in different settings: ...