Practice
Workplace simulations and interview practice. Optional beyond the weekday lessons; studios embed selected scenarios. Everything simulated is labelled.
- 100scenarios
- 25capabilities covered
- 62 hof simulated work
- 150interview questions
Scenarios by capability100
Production incident
Senior code review
Stakeholder simulation
Messy real-world data
ADR centre
Live coding and SQL
- SQL gym: rolling and same-weekday features with window functions30 min
- Python gym: entity-safe lag and rolling features in pandas30 min
- SQL gym: consecutive nearly-full streaks and why the first query lies35 min
- Python gym: turning cumulative booking curves into pickup in pandas35 min
- SQL gym: booking pace against the same weekday last year40 min
ML system design
Ambiguous business case
Verbal defense
Statistical traps
Ablations
Decision theory and value
Robustness and stress tests
Paper reproduction
RAG evaluation workbench
LLM failure lab
- Unsupported citations and broken JSON in a claims assistant35 min
- Injected instructions and a looping helpdesk agent40 min
- A claims summariser that never saw its last document35 min
- A refund assistant that paid twice, in the wrong unit35 min
- An oversized voucher late in a long baggage-claim conversation40 min
Multi-agent company
End-to-end lifecycle
Golden test set and regression
Hiring committee
AI cost–quality
Agents vs workflows
Teach-back and Socratic interviewer
Executive presentation
Research reading protocol
- Read a churn paper before believing its abstract35 min
- Read an agent benchmark paper before adopting its framework35 min
- Does long context make retrieval obsolete? Read the claim40 min
- A language-model judge that agrees with humans 85% of the time35 min
- LoRA matches full fine-tuning: how much can 400 invoices show?35 min
Interview gym159
- Revenue management asks for "the 95% interval for passengers on flight ZX104 next Friday". A colleague returns the 95% confidence interval of the mean passenger count over the last 52 Fridays.senior8 min
- Ancillary attach rate (share of passengers who buy a paid seat or bag) rose in every market segment this quarter, yet the company-wide attach rate fell. The CFO thinks the data are broken.senior8 min
- You need a 95% interval for average ancillary revenue per passenger. Most passengers spend nothing and a few spend a lot (group upgrades, excess baggage).senior10 min
- An airline flags the 10% of routes with the worst on-time performance (OTP) in Q1 and sends them a punctuality programme. In Q2 those routes improve from an average of 71% to 77% OTP.senior12 min
- An A/B test randomises logged-in users, but the analyst computes the standard error of revenue per session with every session treated as an independent row: 10,000 users, about 5 sessions each, a…senior12 min
- A small test on a new checkout button gives 12 purchases from 200 control visitors and 20 purchases from 210 treatment visitors (hypothetical).senior15 min
- An experiment's primary metric was flat. A stakeholder asks for a breakdown by 40 customer segments and finds four segments with p-values 0.004, 0.019, 0.038 and 0.047 (hypothetical;senior12 min