Ace test series: Operating System - Critical Data Minimum Value

Question

Consider the following program segments for two different processes (P1, P2) executing concurrently and where a and b are not shared variables, but x starts at zero and is a shared variable

Processor #1                                                    Processor #2

            for (a = 1; a <= 3; a++)                                    for (b = 1; b <= 3; b++)

                         x = x + 1;                                                        x = x + 1;

If P1 and P2 execute only once and concurrently, then the final minimum possible value of x is ____

Comments

https://gateoverflow.in/286396/self-doubt

https://gateoverflow.in/244600/self-doubt

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2 is the answer