difference between response time and turnaround time
Turnaround time - Time required for a particular process to complete,
from submission time to completion. It is equal to the sum
total of Waiting time and Execution time.
Response time - The time taken in a program from the issuance of a command
to the commence of a response to that command.
(i.e., the time-interval between submission of a request,
and the first response to that request, not the output .)