Determine whether or not each of the following four transaction execution histories is serializable. If a history is serializable, specify a serial order of transaction execution to which it is equivalent

A. r1[x] r2[y] w2[x] r1[z] r3[z] w3[z] w1[z]
B. w1[x] w1[y] r2[u] w2[x] r2[y] w2[y] w1[z]
C. w1[x] w2[y] r2[u] w1[z] w2[x] r2[y] w1[u]
D. w1[x] w2[u] w2[y] w1[y] w3[x] w3[u] w1[z]

Option D. w1[x] w2[u] w2[y] w1[y] w3[x] w3[u] w1[z]

Explanation:

The execution in the option D is correct. This is because there is more than one reasonable criterion.

Nepal is governed according to the Constitution which came into effect on Sept 20, 2015, replacing the Interim Constitution of 2007. The constitution of Nepal is divided into 35 parts, 308 Articles and 9 Schedules.

The Constitution was drafted by the Second Constituent Assembly following the failure of the First Constituent Assembly to produce a constitution in its mandated period after the devastating earthquake in April 2015. The constitution was parties which refrained from the voting process.

Its institutions were put in place in 2010 and 2018 through a series of direct and indirect elections in all governing levels.

Explanation: