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Operating System
161 posts
An operating system is the most important software that runs on a computer. It manages the computer’s memory and processes, as well as all of its software and hardware. It also allows you to communicate with the computer without knowing how to speak the computer’s language.
Explain how the Linux CFS ensures fairness in CPU allocation
When I first opened the Linux kernel source and stumbled onto kernel/sched/fair.c, I expected a maze of arbitrary…
What is the Completely Fair Scheduler (CFS) in the Linux operating system
Every time a Linux machine runs more than one program at once — which is always, even on…
Discuss the impact of CPU scheduling on system responsiveness
Nothing exposes bad CPU scheduling faster than a laggy mouse cursor. You click, and there’s a beat before…
Explain the concept of aging in priority-based scheduling algorithms
Priority scheduling has an obvious, dangerous failure mode: if you always run the highest-priority runnable task, what happens…
How does priority scheduling work, and what are its potential drawbacks
Priority scheduling is one of the oldest and most intuitive ideas in operating systems: not all work is…
Explain the concept of a CPU burst in the context of CPU scheduling
If you’ve ever read an operating systems textbook diagram showing a process alternating between little blocks labeled “CPU”…
Why is CPU scheduling essential for multitasking operating systems
It’s easy to take multitasking for granted — you have a browser with thirty tabs open, a music…
How do functional languages handle parallelism and synchronization without explicit locks
Ask a Java or C++ developer with battle scars from race conditions what they think about concurrency, and…
Describe the concept of software transactional memory (STM) in functional languages.
Databases solved concurrent access to shared data decades ago with transactions: group a set of operations together, and…
Describe how functional languages handle shared state and mutable data in concurrent programs.
There’s a common misconception that functional programming simply “doesn’t have” mutable state or shared data — as if…