What is Microsoft's release cadence for SCOM?

The interviewer is asking a question about release dates to determine whether you continue to educate yourself about SCOM and are on top of the administrative issues related to the software. They may be genuinely interested in this topic as well because it requires them and to plan ahead. Knowing this information will establish your expertise in this area.

"in March of 2019, Microsoft announced changes too often they would update SCOM. Since most of their customers were using the long-term servicing channel or LTSC support option, Microsoft is moving to this model. Summarized, it provides five years' worth of support for the software, with periodic patches and bug fixes as needed. This will replace periodic version releases of SCOM."