You are invited to take beta exam 71-660: TS: Windows® Internals.
If you pass the beta exam, the exam credit will be added to your transcript and you will not need to take the exam in its released form. By participating in beta exams, you have the opportunity to provide the Microsoft Certification program with feedback about exam content, which is integral to development of exams in their released version. We depend on the contributions of experienced IT professionals and developers as we continually improve exam content and maintain the value of Microsoft certifications.
Please remember that participation in the beta process is completely voluntary and Microsoft makes no promises or guarantees regarding the beta exam process. You can expect to receive your score on the beta exam within 12 weeks of taking the exam, although in some instances, beta exams may take longer to score and your results may be delayed
It’s part of Microsoft Certified Technology Specialist (MCTS): Windows® Internals
More information at Microsoft Advanced Windows Debugging and Troubleshooting