Santander Interview Questions
The questions to prepare for Santander interviews, across all roles. Questions from real interview reports rank first. Updated weekly.
Implement an LRU cache in O(1) average time using a hash table and doubly linked list.
SantanderCompare pre and post campaign conversion rates by customer signup cohort using joins, a CTE, conditional aggregation, and date intervals.
SantanderCompute top 10 customers by net sales using joins and aggregations, ordering by revenue with deterministic tie-breaking.
Gain Digital
TCS
Zest AIUse joins and LAG to isolate departments driving a large month-over-month spending variance.
State of California
University of Chicago
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Compute the probability that two fair six-sided dice add up to 9 by counting favorable outcomes over total outcomes.
SantanderA framework for connecting user needs to business goals, then making product decisions with clear trade-offs and measurable outcomes.
SantanderSet a clear north star, supporting KPIs, leading indicators, and guardrails for a new product feature.
SantanderDesign an LLM serving system that balances latency, cost, scalability, and safety for production traffic.
SantanderBalance technical debt reduction against feature delivery while aligning engineering, product, and leadership on priorities.
SantanderExplain precision, recall, F1-score, and ROC-AUC for a classification model.
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