Which of the following creates the illusion to multiple interactive users that they each have a dedicated machine?
A. program tracker
B. memory management
C. process management
D. multiprogramming
E. timesharing
The correct answer and explanation is:
The correct answer is E. timesharing.
Timesharing is a method of computing that allows multiple users to interact with a computer system simultaneously by rapidly switching between different user tasks. It creates the illusion that each user has a dedicated machine, even though they are all sharing the same computer resources. This is achieved by allocating time slots to each user or process, so that the system appears to be continuously available to each individual user.
In a timesharing system, the operating system manages the allocation of CPU time, memory, and other system resources in small time slices. Each user is assigned a slice of time, during which their process runs, and then the system switches to another user’s process. This switching happens so quickly that users perceive the system as responsive and dedicated to their needs, even though they are sharing the machine with others.
Timesharing systems typically provide features such as virtual memory, which allows each user’s processes to have the illusion of exclusive access to memory. They also include mechanisms for managing input/output devices and network communication, so that all users can interact with the system as if they had their own personal computer.
This approach contrasts with earlier systems, where only one user could interact with the machine at a time, such as in batch processing systems. Timesharing enables efficient utilization of expensive computing resources and is widely used in environments where many users need access to computing power, such as universities, research labs, and large enterprises.