1- What is the optimal mutual exclusion strategy in OpenMP if a critical section looks like x += b;? Assume there are no other crucial portions in the program. a. lock b. critical section c. atomic 2- What is the optimal mutual exclusion strategy in OpenMP if a critical part looks like x += c; y+=b;? Assume there are no other crucial portions in the program. a. lock b. critical section c. atomic 3- In OpenMP, we can't always tell how many crucial sections are in a program just by glancing at the source code. a. True b. False 4- Let's say we want to start a kernel with the following command: kernelname 4,4>>> (argument list...); Let's say the kernel has a global variable called x. How many x instances will there be? a. 16 b. 4 c. 8 d. 1 e. 2

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