OpenMP in Small Bites/Tasking and Data Scoping

Quiz

1. Consider the following code snippet

int x = 42;
#pragma omp parallel private(x)
{

#pragma omp task

{

x = 3;

}

}
printf("x=%d\n", x);

What is the data scope of x and what is printed?

	firstprivate, x=42
	firstprivate, x=3
	shared, x=3

2. Consider the following code snippet

int x = 42;
int y = 0;
#pragma omp parallel num_threads(4)
{
#pragma omp task
{
y += x;
}
}
printf("y=%d\n", y);

What is the data scope of x and what is printed?

	shared, y=42
	shared, y=168
	firstprivate, y=168

3. Consider the following code snippet

int x = 42;
int y = 0;
#pragma omp parallel num_threads(4)
{
#pragma omp single
{
#pragma omp task
{
y += x;
}
}
}
printf("y=%d\n", y);

What is the data scope of x and what is printed?

	shared, y=42
	shared, y=168
	firstprivate, y=168