Security issues in multi tasking and time sharing environment

Asked By Patricia_Fields 0 points N/A Posted on - 11/08/2011

Please elaborate on the security issues that can be caused in a multitasking or time-sharing environment when more than one user is using the system at the same time?

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Answered By Mahesh Babu 20 points N/A #107691

Security issues in multi tasking and time sharing environment

Hello Patricia,

In a Time Sharing environment, the operating system assigns some time slots to each job that is being executed. The jobs here are executed according to the allotted time slots for each of them as shown in the example below:

1. Task1: 0 to 5
2. Task: 5 to 10
3. Task: 10 to 15

The challenge here can be when on task is big hence requires some more time to execute; it will be still allotted the same time slot as the others.

Multi-Tasking on the other hand is whereby the operating system executes jobs in parallel. Multitasking can also be attained by use of multiple processors (or) CPUs only as shown in the example below:

• CPU1: task1
• CPU2: task2
• CPU3: task3

The challenge here may come when a task has to be executed critically, it has to wait till the others finish before it can be executed.

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Regards,
Mahesh Babu

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• Posted on - 11/08/2011
• Question Category: Misc Security