Can an individual create an OS entirely from scratch?
Hey,
Though it’s highly complex, some enthusiasts and developers have created basic operating systems as personal projects.
If you’re preparing for an OS interview, you can refer to the guide shared below. It covers all the essential questions, addressing concepts for both freshers and experienced professionals.
I agree with @saniyag, but just to add up, I say that when creating an operating system from scratch requires an in-depth knowledge of low-level programming languages like Assembly and C.
Developers need to understand concepts such as memory management, process scheduling, file systems, and hardware interaction. While it is challenging, individuals with this expertise can build a functional OS, though it often lacks the complexity of mainstream systems like Windows or Linux.
Hope this helps 
With the abundance of open-source resources, tutorials, and communities, it has become more feasible for individuals to attempt building an OS. Projects like “OSDev” provide documentation, forums, and starter kits for those interested in operating system development, making it easier for individuals to learn and experiment with OS creation, even if the end result is a simple or niche system.