AMCAT Operating System Quiz-1

ISP is for Internet Service Provider, and DSL stands for Digital Subscriber Line.
The same business that provides a phone connection in a digital subscriber line system also serves as an ISP. Through the already-installed telephone lines, internet access is given.

System Calls provide an interface for utilizing the operating system's functions.
For the most part, these are C and C++ functions.
The most commonly used system calls include Open, Close, Read, and Write.

Real-time operating systems include VxWorks, QNX, and RTLinux. A mobile operating system is Palm OS. For use with Personal Digital Assistants, Palm OS is created (PDAs).

A hybrid kernel powers OS X.A hybrid kernel combines two distinct kernels. Apple is the company that creates OS X, which was formerly called Mac OS X.

Session layer is the fifth layer in the OSI reference model.
The method for starting, stopping, and managing a session between end-user application processes is provided by the session layer.
The session layer is absent from the TCP/IP paradigm because the transport layer in the TCP/IP protocol stack performs the functions of the session layer.

Consider a process that is waiting for an I/O service and is in the "Blocked" state.It moves to the ready state once the service is finished. From the waiting state, a process never immediately enters the running state. When a CPU is allotted by the operating system, only processes that are in the ready state go into the running state.

When the time slot allotted to a process in a time-sharing operating system expires, the process switches from the running state to the ready state.
A time quantum or time slice is the unit of time used in time-sharing operating systems to describe CPU sharing.
A process releases the CPU on its own if it takes less than one time quantum.

Each user in a time sharing system must periodically receive a share of the CPU.

States for resource allocation are used to maintain the availability of the resources that are already and currently available.

The undesirable departure from the correct periodicity is known as jitter.