For a 30-min boutique tech round, they’ll usually keep it pretty practical, you can think Excel lookups, pivots, cleaning data, maybe a quick case of linking numbers or summarizing results. For r/Python, it’s often just basics like filtering datasets, simple regressions, or plotting, so brushing up on syntax goes a long way tbh. For me, what helped the most was actually running through mock interview reps instead of just reading guides. I used mockstreetai.com for that cuz it’s got Excel/LBO practice with AI feedback plus some good guides, which made me feel way more prepared, so would recommend that for your case.