Generally, asking opinions rather than specific technical answers.
Asking "Do you have experience with technology X" is useless - everybody knows that "yes" is the expected answer.
Asking specific technical questions is random - they might or might not have come across that particular problem. Also, in practice the answer would simply be looked up, and you don't want to hire for memorization.
Instead, ask things like"How did you find working with <technology X>? Can you compare it to <common alternative>, or <similar tech also listed on their resume>?".
Or maybe "what worked really well with <technology X>? What pitfalls did you fall into? Anything for which you would, or would not, recommed it?"
This kind of info is hard to fake, gives you good insight into their thought process and priorities, or just gets people talking about their projects more easily than a generic "tell me about your work on project y".
Asking "Do you have experience with technology X" is useless - everybody knows that "yes" is the expected answer.
Asking specific technical questions is random - they might or might not have come across that particular problem. Also, in practice the answer would simply be looked up, and you don't want to hire for memorization.
Instead, ask things like"How did you find working with <technology X>? Can you compare it to <common alternative>, or <similar tech also listed on their resume>?". Or maybe "what worked really well with <technology X>? What pitfalls did you fall into? Anything for which you would, or would not, recommed it?"
This kind of info is hard to fake, gives you good insight into their thought process and priorities, or just gets people talking about their projects more easily than a generic "tell me about your work on project y".