ISRO CSE 2007 | Question: 25

Question

What is the name of the technique in which the operating system of a computer executes several programs concurrently by switching back and forth between them?

• A. Partitioning
• B. Multi-tasking
• C. Windowing
• D. Paging

Comments

The technique is called multi-tasking. In multi-tasking, the operating system quickly switches between multiple programs, giving the illusion that they are running simultaneously. This switching occurs in milliseconds or even picoseconds, allowing each program to make progress without waiting for others to finish. This helps in efficiently utilizing the CPU and improves the overall performance of the computer.

Answer 1

ans is (b)

multitasking is a concept of performing multiple tasks (also known as processes) over a certain period of time by executing them concurrently.

New tasks start and interrupt already started ones before they have reached completion, instead of executing the tasks sequentially so each started task needs to reach its end before a new one is started. As a result, a computer executes segments of multiple tasks in an interleaved manner, while the tasks share common processing resources such as central processing units(CPUs) and main memory.

Multitasking does not necessarily mean that multiple tasks are executing at exactly the same time (concurrently). In other words, multitasking does not imply parallel execution, but it does mean that more than one task can be part-way through execution at the same time, and that more than one task is advancing over a given period of time

Answer 2

B.Multi-tasking