The Critical Problem o Interleaved execution (due to parallel processing or context switching): p1:R1= X p2: R1=R1+1; R2 x; x=R1; R2=R2 +1 x=R2; ox has only been incremented once The first update (=R1)is lost.The Critical Problem  Interleaved execution (due to parallel processing or context switching): p1: R1 = x; p2: … R1 = R1 + 1; R2 = x; x = R1 ; R2 = R2 + 1; … x = R2;  x has only been incremented once The first update (x=R1) is lost. 7