Manage hardware, processes, memory and files for applications.
An OS manages hardware and provides abstractions: processes, memory, files, devices, security and networking. Kernel modes separate privileged and user code; system calls request services. Examples: Linux, Windows, macOS, Android. Kernels may be monolithic or microkernel.
When a program reads a file, the OS handles disk access via system calls.
An operating system manages hardware and shares it among programs, so it is the layer that every application relies on.
Manage hardware, processes, memory and files for applications.
An operating system manages hardware and shares it among programs, so it is the layer that every application relies on.
It manages processes, memory, files and devices, and it provides system calls that applications use to access these resources safely.
A request from an application to the operating system for a service such as reading a file or creating a process.
Typical applications include starting a program and giving it memory and file access, scheduling multiple applications on a single computer and handling a disk read request from an application.
Study "Computer organisation" first (topic 57 of 104 in Software & Computing). It covers the groundwork this topic builds on.
Kernel vs user mode. Drivers. Interrupts.
When a program reads a file, the OS handles disk access via system calls.
The next topic is "Processes and scheduling", which builds directly on this one.
It is classed as Intermediate in Software & Computing (topic 58 of 104). It is an intermediate topic. Work through the beginner topics in Software & Computing first.
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