Costar Group Software Engineer Interview Questions
The questions to prepare for a Costar Group Software Engineer interview. Questions from real interview reports rank first. Updated weekly.
Calculate weighted average selling prices by product using a date-range join, aggregation, and NULL handling.
Costar GroupCalculate month-over-month sales growth for each product category using JOINs and window functions.
Wayfair
REVOLVE
FanaticsUse GROUP BY and SUM to rank the top 10 customers by total revenue from a single sales table.
Housecall Pro
Equifax
XYZDetermine whether two CoStar listing tokens are anagrams using character frequency counts in linear time.
Costar GroupCompare object-oriented and functional programming in terms of state, abstraction, side effects, and design tradeoffs.
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Explain how you plan for scalability and maintainability up front, including trade-offs, success criteria, and risk management.
Costar GroupDescribe a time you had to choose between speed, quality, and scope, and how you aligned stakeholders around the trade-off.
Costar GroupTests front-end architecture thinking and state management patterns for component communication.
Costar GroupTests incident debugging approach, evidence gathering, and risk-aware troubleshooting.
Costar GroupAssesses practical caching design to improve performance and reduce database pressure.
Costar Group