Microsoft Certified Solutions Developer (MCSD) Certification Practice Test

Which method is used to parallelize a for loop in C#?

1. Parallel.For()

2. Task.Run()

3. ForEachParallel()

4. RunParallelFor()

The correct answer is: Parallel.For()

The method used to parallelize a for loop in C# is Parallel.For(). This method is part of the Task Parallel Library (TPL), which is designed to simplify the implementation of concurrent and parallel programming. When using Parallel.For(), the iterations of the loop can be executed concurrently across multiple threads, which allows for better utilization of system resources and potentially faster execution for tasks that are computationally intensive and can be performed independently. This is particularly useful for operations where each iteration does not affect the others, enabling the system to divide the work efficiently among available processors. The design and architecture of Parallel.For() facilitate the automatic management of threads, load balancing, and handling of exceptions, which streamlines the process of parallelizing loop constructs without the need for explicit threading code. In contrast, Task.Run() is primarily used for running a task asynchronously but does not inherently parallelize loops. ForEachParallel() and RunParallelFor() are not standard methods provided by the .NET framework for loop parallelization, making them irrelevant in this context.