Sphere Interview Questions
We track 3 interview questions reported from Sphere: 2 in System Design for ML, 1 in Coding & Leetcode-style Questions. They average 3.0/5 difficulty — medium for a working engineer — and every one was reported by someone who sat the loop, not written by us. The topics that come up most: system-design, data-modeling, geospatial, caching. 3 were reported asked within the last year — most recently October 2026.
Practice these on the problems board →Question mix
- System Design for ML2
- Coding & Leetcode-style Questions1
Difficulty
- 2/5 — easy1
- 3/5 — medium1
- 4/5 — hard1
Asked for SWE (3)
Topics Sphere asks about
Reported Sphere questions
Design a Sales Tax Engine (Address + Date to Tax)
4/5A system design question about a sales-tax calculation service, with most of the weight on its data model. Strong answers cover overlapping taxing authorities whose borders cross, auditable history of rate changes, and then caching, bulk recalculation and a holiday traffic spike.
System Design for MLasked October 2026single reportsystem-designdata-modelinggeospatialSpeed Up the Latest New Job Query on a 100M-Row Table
3/5A database performance question: one lookup against a very large jobs table has slowed to a crawl. You describe the access path the engine falls back on, repair it without putting anything in front of the database, and then reason about concurrent consumers, write overhead and a safe change on a live system.
System Design for MLasked October 2026single reportsystem-designdatabasessqlSales Tax Owed per State from Transactions and Tax Authorities
2/5A coding question on computing sales tax owed to three US states from a list of sales and a table of regional tax authorities. It tests falling back to a postcode lookup when the state is missing, taxing only the items each authority covers, subtracting credits and refunds, and rounding just once per state.
Coding & Leetcode-style Questionsasked October 2026single reportcodinghash-tablesimulation
Companies that ask similar questions
Sphere interview FAQ
- How many Sphere interview questions are available?
- 3 reported Sphere questions, the largest group being System Design for ML (2).
- How hard is the Sphere interview?
- Across the questions we track, Sphere averages 3.0 out of 5: 1 at 2/5, 1 at 3/5, 1 at 4/5.
- What topics does Sphere ask about?
- Most often system-design, data-modeling, geospatial, caching, tax.
- Are these Sphere questions still current?
- The most recent Sphere report here is from October 2026, and 3 were reported asked within the last twelve months. Dates come from the interview reports themselves, so they reflect when candidates actually sat the question.