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The number of processes completed per unit time is known as __________

(a) Output

(b) Throughput

(c) Efficiency

(d) Capacity

I have been asked this question in exam.

Enquiry is from Process Control Block topic in section Processes of Operating System

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Best answer
Right answer is (b) Throughput

The explanation: The number of processes completed per unit time is known as Throughput. Suppose there are 4 processes A, B, C & D they are taking 1, 3, 4 & 7 units of time respectively for their executions. For 10 units of time, throughput is high if process A, B & C are running first as 3 processes can execute. If process C runs first then throughput is low as maximum only 2 processes can execute. Throughput is low for processes which take a long time for execution. Throughput is high for processes which take a short time for execution.

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