WJEC Digital Technology Practice Test

What is a primary function of the operating system when managing processes on a multi-tasking system?

Distributes network bandwidth among processes. Encrypts process data for security. Provides graphical fonts. Ensures that all tasks appear to run simultaneously on a multi-tasking OS.

Correct Answer:

Ensures that all tasks appear to run simultaneously on a multi-tasking OS.

Explanation:

Managing multiple tasks so they seem to run at the same time is achieved through scheduling and context switching in a multitasking operating system. The OS allocates CPU time to different processes in small time slices and rapidly switches between them. This rapid switching, especially with preemptive multitasking, makes progress on several tasks appear to happen simultaneously, even if only one processor is available. That illusion of concurrent execution is the core idea behind multitasking. Other aspects like distributing network bandwidth, encrypting data, or providing fonts relate to other functions (network/resource management, security, and display), but they don’t address how multiple processes are kept active and responsive in a multitasking environment.

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