I bombed a technical interview — herE's how I tried to salvage it and what happened

Technical round for a data engineering role. First question was about a specific Spark optimisation technique I had used but couldn't articulate clearly under pressure. Second question I genuinely didn't know. I could feel it going sideways.

What I did in the moment:
For the second question, instead of fumbling, I said: "I don't have hands-on experience with that specific approach. What I do know is [adjacent knowledge]. Could you walk me through how you use it here? I'd like to understand the context."

This shifted the dynamic from 'candidate being evaluated' to 'two people having a technical conversation.' The interviewer seemed to appreciate the honesty.

What happened: I didn't get that specific role. But the interviewer sent me a LinkedIn connection request afterward and two months later reached out about a different opening. Handling it with composure mattered.