Answer :
In Peterson's algorithm, the flag array represents if a process exists ready to enter its critical section.
What is Peterson's algorithm?
Using just shared memory for communication, Peterson's method (also known as Peterson's solution) is a concurrent programming approach for mutual exclusion that enables two or more processes to share a single resource without interfering with each other.
The critical-section problem is well-described algorithmically in Peterson's solution, which also highlights some of the challenges in creating software that satisfies the conditions of mutual exclusion, progress, and constrained waiting.
Two processes are synchronized using Peterson's Algorithm. To do this, it makes use of two variables: an int variable called turn and a bool array flag with a size of 2. I and j stand in for the Consumer and Producer, respectively, in the answer.
Hence, In Peterson's algorithm, the flag array represents if a process exists ready to enter its critical section.
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