Microsoft Certified Solutions Developer (MCSD) Certification Practice Test

How can you wait for a thread to finish executing?

1. Call the Abort method

2. Use the Join method on the thread object

3. Utilize the BeginInvoke method

4. Implement the Sleep method

The correct answer is: Use the Join method on the thread object

To wait for a thread to finish executing, the most effective approach is to utilize the Join method on the thread object. When a thread is created and started, it runs concurrently with other threads. By calling the Join method on a thread, the calling thread is blocked until the thread on which Join was called has completed its execution. This is particularly useful in scenarios where the results of the thread's execution need to be used afterward, ensuring that you do not proceed until that thread has finished its work. The Join method offers a straightforward way to synchronize threads, making it ideal for this purpose. Other methods such as aborting a thread or sleeping do not facilitate proper waiting for completion. For instance, calling the Abort method abruptly terminates a thread without allowing it to finish its execution. Similarly, the Sleep method merely pauses the current thread for a specified duration, which does not guarantee that the target thread will finish during that period. Utilizing the BeginInvoke method is geared towards starting asynchronous operations and does not serve the purpose of waiting for thread completion. Thus, utilizing the Join method on the thread object is the most appropriate and effective way to ensure that you can wait for a thread to finish executing.