Bookends of the Week

A hard SQL mock interview question on DataDriven, with an AI interviewer who asks follow-up questions and a hire or no-hire decision at the end.

Domain
SQL
Difficulty
hard
Seniority
L4

Interview Prompt

A payments team is profiling how each week's spending clusters around its two edges, Monday and Sunday. For each week, give the share of that week's spending that landed on Monday and the share that landed on Sunday.

Summary

Every week has two edges. Weigh what lands on each.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write and run your SQL against a real database
  4. Answer the interviewer's follow-up questions, then get a hire or no-hire decision