Vector Addition¶

1. In the parallelized version of the vector addition function using OpenACC, which directive is used to offload the code block to the GPU?

• A. #pragma acc parallel
• B. #pragma acc data
• C. #pragma acc kernels
• D. #pragma acc async

Data Movement and Memory Allocation¶

2. Which data clause in OpenACC is used to transfer data from the host (CPU) to the device (GPU) at the beginning of a parallel region?

• A. copyout
• B. copyin
• C. create
• D. present

3. True or False: The copyout clause in OpenACC ensures that the results of a computation on the GPU are transferred back to the CPU after the parallel region completes.

Loop Parallelization¶

4. In the OpenACC parallelized version of vector addition, the loop clause is used to:

• A. Create memory on the GPU
• B. Specify that the loop should be parallelized across GPU threads
• C. Transfer data from the GPU to the CPU
• D. Sequentially execute the loop

Avoiding Pointer Aliasing¶

5. True or False: The restrict keyword in C/C++ tells the compiler that pointers do not overlap in memory, allowing for safer and more efficient parallelization.