Practice the rounds you are actually likely to face.

Seven modes exist. Only the ones your target needs show up.

Pick a target and watch the lab reshape.

Coding
Role-calibrated problems with explanations and evaluation. Example: Editor, test results and feedback.
Active for this role
SQL
Queries, data reasoning and optimization. Example: Schema, result and critique.
Active for this role
System design
Ambiguous system problems with follow-ups.
Not needed
ML and AI design
Model, data, evaluation and serving trade-offs. Example: Design response and critique.
Active for this role
Case study
Business ambiguity and structured analysis. Example: Answer and reasoning feedback.
Active for this role
Concept drill
Targeted depth without a coding label. Example: Adaptive question and answer.
Active for this role
Behavioral and leadership
Evidence-oriented scenarios. Example: Structured evidence and follow-up feedback.
Active for this role

SPHERO activates only the modes your target roles and observed gaps call for.

Results, critiques and retries update your capability map and your next-best action. Practice that does not change the plan is just activity.