Question

In round-robin CPU scheduling, as the time quantum is increased:

a. Average turnaround time decreases
b. Average turnaround time increases
c. Varies depending on the burst time of processes
d. Does not change

Answer 1

Increasing the time quantum in round-robin CPU scheduling typically results in a higher average turnaround time, as it can lead to processes waiting longer for their execution turn.

Step-by-step explanation:

In round-robin CPU scheduling, as the time quantum is increased, the average turnaround time typically increases. This is because with a longer time quantum, each process gets more CPU time per turn, which can lead to less frequent context switches but also means that processes may have to wait longer before getting their turn to execute. When the time quantum is set very high, the round-robin algorithm starts resembling a first-come, first-served (FCFS) scheduling, which can lead to longer waiting times, especially for processes that arrive later.