In a multithreaded system, any order of operations could possibly happen, from each thread happenening serially, to all of them running at the exact same time. For example, if you have four threads, all $4$ threads will execute $($and inevitably finish$)$ that same code flow. However, the threads do not necessarily start at the same time; the threads do not necessarily execute at the same rate $($the code that each thread executes is not perfectly interleaved$)$; the threads do not necessarily finish running the whole program at the same time.

For these sets of problems, let's explore what happens when you try to execute the same code on multiple threads.

Q$1$: We run the following code on four threads:

#pragma omp parallel $\{//$ Hint: loop variable i is declared inside the #pragma directive $//$ therefore, it is a private variable per thread. for $($int i $=0$; i $<3$; i$++)\{$ printf$("\%$d$",$i$)$; $\}\}$