Practice with the full bank, then narrow into a path.
Your active path is foundations track, but the catalog stays broad by default so you can spot harder reps, switch contexts quickly, and still return to the path that best matches your current goal. Starter includes 160 free problems and marks 94 Pro-only problems before you open a gate.
Start broad, then focus when you want structure.
Company labels help frame practice in a familiar business context. They are directional study aids, not official interview guidance from the companies listed. We keep all paths visible first so hard questions do not disappear.
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TikTok
Foundations Track
First Customer Transaction
TikTok is reviewing first customer transaction through a scorecard. Return each user_id and transaction_date for the first transaction made by that user. Sor...
TikTok
Foundations Track
2024 App Click Volume
TikTok wants a scorecard for 2024 app click volume. Return each app_id and the total number of click events recorded in 2024. Sort by app_id.
TikTok
Foundations Track
Creators With Multiple 2024 Posts
TikTok wants a trend check for creators with multiple 2024 posts. Return each creator_id that posted at least two items in 2024. Sort by creator_id.
TikTok
Foundations Track
Frequent Support Callers
Use this TikTok scorecard to work on frequent support callers. Return the distinct policy_holder_id values for members who made at least 3 calls. Sort by pol...
TikTok
Foundations Track
Late Shipment Rate By Carrier
TikTok is reviewing late shipment rate by carrier through a operations review. Return the percentage of shipments that arrived late by carrier_name. Output c...
TikTok
Foundations Track
Second-highest Salary
TikTok wants a manager brief for second-highest salary. Return the second-highest salary amount in the table as second_highest_salary.
TikTok
Foundations Track
Primary Department For Each Employee
At TikTok, analysts are preparing a operations review focused on primary department for each employee. Return each employee_id and whether the employee met q...
TikTok
Analytics Reporting Track
Seven-Day Trial Conversion
The growth team wants to compare acquisition channels for January trial signups. For each acquisition_channel, return the number of users who converted withi...
TikTok
Analytics Reporting Track
One-Month Creator Retention
Growth wants a basic cohort view for creator retention. For signup_month values from 2024-01-01 through 2024-03-01, return the cohort size, the number of cre...
TikTok
Interview Core Track
Rolling Three-day Earnings
At TikTok, analysts are preparing a trend check focused on rolling three-day earnings. Return each user_id, transaction_date, and rolling_3_day_earnings base...