UGC NET CSE | December 2018 | Part 2 | Question: 74

Question

​​​​​​​Suppose $P, Q$ and $R$ are co-operating processes satisfying Mutual Exclusion condition. Then, if the process $Q$ is executing in its critical section then

• A. Both $‘P’$ and $‘R’$ execute in critical section
• B. Neither $‘P’$ nor $‘R’$ executes in their critical section
• C. $‘P’$ executes in critical section
• D. $‘R’$ executes in critical section

Answer 1

Mutual execution means only one process can enter the critical section at a time so when Q is in the critical section no other process can be in critical section.

Option (b)