Top 50 SQL, Python & Excel Interview Questions
Prepare for top product, consulting, and business analyst technical rounds. Practice real business scenarios inside our interactive candidate IDE sandboxes.
Top 50 SQL Interview Questions
Master essential SQL interview queries from basic filtering to advanced window functions, CTEs, and self-joins tested at Amazon, Google, Meta, and Flipkart.
Top 50 Python & Pandas Interview Questions
Ace Python and Pandas technical interviews with real-world scenarios on data cleaning, multi-index slicing, groupby aggregations, merges, and time-series.
Top 50 Excel & Business Modeling Questions
Conquer investment banking, consulting, and business analyst spreadsheet assessments covering XLOOKUP, dynamic arrays, SUMIFS, Power Query, and DCF modeling.
High-Yield Evergreen Questions
The most frequently tested interview patterns across product, data, and business analyst rounds.
Find Active Subscribers with Valid Billing in SQL
Filter subscriber records based on active status flags and non-null payment verification timestamps.
Filter High-Value Transactions in Price Ranges in SQL
Select transaction records within a defined numeric threshold using the BETWEEN operator.
Conditional Categorization Using CASE WHEN in SQL
Categorize orders into priority tiers based on delivery distance and preparation duration.
IN vs EXISTS in SQL Subquery Filtering
Compare query performance and NULL handling behavior between IN and EXISTS.
Filtered Aggregations with COUNT(CASE WHEN) in SQL
Pivot counts of different status values into separate columns in a single scan.
Calculate Customer Lifetime Value with INNER JOIN in SQL
Join customer details with order history to aggregate total order count and lifetime spend.
Find Unmatched Records with LEFT JOIN Anti-Pattern in SQL
Identify records in table A that have no corresponding matching records in table B using LEFT JOIN and IS NULL.
Self-Joins for Organizational Hierarchy in SQL
Join an employee table with itself to map employees to their direct managers.