How many testers can a 64-bit TSM hold during active testing?

A 64-bit test security manager (TSM) is capable of handling a significant number of simultaneous testers during active testing due to its architecture, which supports more memory and resources than a 32-bit system. Specifically, the capacity for active simultaneous testers is determined by various factors, including the overall design and limitations set by the test administration framework.

In this case, the correct number of simultaneous testers that a 64-bit TSM can accommodate is 275. This value reflects optimal conditions where the system is fully utilized and able to effectively manage the required data and traffic load during testing.

Other provided options are not aligned with the technical specifications and operational parameters established for a 64-bit TSM, suggesting either underestimation or overextension beyond its capability to ensure efficient and stable testing experiences. Understanding the maximum capacity is crucial for test coordinators to ensure the smooth processing of tests without interruptions or performance dips.