Octopus Energy Interview Questions
The questions to prepare for Octopus Energy interviews, across all roles. Questions from real interview reports rank first. Updated daily.
Trace a $10 depreciation increase through net income, cash flow, PP&E, retained earnings, and the balance sheet.
Explain a controlled month-end close workflow, including accruals, reconciliations, review controls, and audit-ready documentation.
Calculate each customer's 7-day rolling average energy usage using daily aggregation and a PostgreSQL window frame.
Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.
Diagnose a sudden 20% KPI decline by validating measurement, decomposing drivers, and separating real behavior changes from data issues.
Explain how to optimize near-term product outcomes without sacrificing long-term user trust, retention, and value.
Explain statistical significance, p-values, uncertainty, and practical importance to a non-technical audience.
Determine the sample size needed to detect a meaningful A/B test effect at a chosen significance level and power.
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Approach a mixed interview round while summarizing completed activity with a CTE, aggregation, and left join.
WiseJoin two tables and derive palindrome, reversed-substring, and character-frequency results with PostgreSQL.
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