This is what I do too. I try to engage the candidate in what they have worked on. Then I try to adapt problems to their environment and have them explain to me

This is what I do too. I try to engage the candidate in what they have worked on. Then I try to adapt problems to their environment and have them explain to me how they solved them. Or if were to encounter that problem in their environment, how would they solve them. Granted, you need to be able to program. But being able to recall and implement particular algorithms from memory isn't particularly valuable to the job. I want problem solvers. People who have dealt with complicated problems and found solutions. Or at least know how to find them.