Memory forensics would have 100% given you evidence that it was accessed and exactly what was done. There are plenty of guides on how to forensically dump memory but that depends on the OS.
But I'm also in this is FUD camp. I highly doubt any company would do such a risky thing such as mirror your machine data merely for an interview. This would be highly illegal and damage the companies reputation for a relatively minor benefit.
Especially when interviewing any software dev which any infosec person would assume they are dealing with a sophisticated target with a high chance of being detected. Meaning they would have to use very careful cloning techniques.
It would be much easier to get you on staff on a company machine and temporarily monitor you closely after the fact. There are plenty of ways to thoroughly vet someone beforehand without taking such a risk.