Question

In an operating system, the interval between the time of submission of a job to the system for processing and the time of first response from the system for the job is known as

• A. Throughput
• B. Response Time
• C. Turnaround Time
• D. Computing Time

Hint:

Remember: \[ \text{Response Time} = \text{Time until first response} \] \[ \text{Turnaround Time} = \text{Total completion time} \]

Answer 1

The Correct Option is B

Concept: Operating systems use various performance metrics to evaluate efficiency. Some important metrics are:
• Response Time
• Turnaround Time
• Throughput
• Waiting Time Each metric measures a different aspect of system performance.

Step 1: Understand Response Time.
Response Time is the interval between: \[ \text{Job Submission} \] and \[ \text{First Response Generated} \] It measures how quickly the system starts responding to a request.

Step 2: Understand Turnaround Time.
Turnaround Time measures the total time from job submission until complete execution. \[ \text{Turnaround Time} = \text{Completion Time} - \text{Arrival Time} \] This is different from first response time.

Step 3: Understand Throughput.
Throughput refers to the number of jobs completed per unit time. \[ \text{Throughput} = \frac{\text{Number of Jobs Completed}} {\text{Unit Time}} \]

Step 4: Identify the correct metric.
Since the question specifically refers to the time until the first response, the appropriate metric is Response Time. \[ \boxed{\text{Response Time}} \] Hence, option (B) is correct.