OpenACC Directives¶

1. Which OpenACC construct requires the programmer to explicitly define the parallel regions in the code?

• A. kernels
• B. parallel
• C. routine
• D. loop

Difference between parallel and kernels¶

2. True or False: The kernels construct allows the compiler to analyze and automatically parallelize code regions.

Loop Construct¶

3. Which clause in the OpenACC loop construct specifies SIMD execution across vector lanes?

• A. gang
• B. worker
• C. vector
• D. collapse

4. True or False: The collapse clause in OpenACC can be used to combine nested loops into a single loop for parallelization.

Routine Construct¶

5. What is the purpose of the routine construct in OpenACC?

• A. To parallelize loop iterations
• B. To specify functions that can be safely called within parallel regions
• C. To optimize memory transfers between host and device
• D. To manage data synchronization