Q33

The enter_CS() and leave_CS() functions to implement critical section of a process are realized using test-and-set instruction as follows: void enter_CS(X) { while(test-and-set(X)); } void leave_CS(X) { X = 0; } In the above solution, $X$ is a memory location associated with the $CS$ and is initialized to $0$. Now consider the following statements: Which of the above statements are TRUE? (I) only (I) and (II) (II) and (III) (IV) only