System designLast reported Aug 2026
Design an Ephemeral Messaging Service
Design one-to-one messaging whose content disappears consistently after viewing or expiry, including retries and failure recovery.
Open practiceSuperhuman interview practice
Superhuman Coding Practice: Grammarly-Source Exercises Start with verified evidence.
Practice from 9 Superhuman-tagged public coding problems, organized only by the stage, topic, difficulty, and recency metadata FastPrep can verify. The broader public catalog also includes 1 system-design exercise.
- Catalog
- 10 public practice assets (9 coding)
- Start here
- Use the stage named in your invitation
- Evidence
- OA · Phone metadata, shown in context
OA practice path
Online Assessment
Build a timed implementation rhythm from prompt to edge cases. Problems are ranked by repeated public catalog sightings.
| Company | Problem | Difficulty | Public evidence | Action |
|---|---|---|---|---|
SUSuperhuman | Lost MessagesTwo PointersString | Easy | 1 public reportLast reported Apr 2026 | Practice |
SUSuperhuman | Math HomeworkDynamic ProgrammingArray | Medium | 1 public reportLast reported Apr 2026 | Practice |
SUSuperhuman | Optimal TransferGraphShortest Path | Hard | 1 public reportLast reported Apr 2026 | Practice |
Phone practice path
Phone Screen
Practice solving while explaining assumptions, tradeoffs, and complexity. Problems are ranked by repeated public catalog sightings.
6 Superhuman-tagged Phone Screen problems available.
| Company | Problem | Difficulty | Public evidence | Action |
|---|---|---|---|---|
SUSuperhuman | Find the First Target IndexArrayBinary Search | Easy | 1 public reportLast reported Jul 2026 | Practice |
SUSuperhuman | Intersect Two Interval ListsArrayTwo Pointers | Medium | 1 public reportLast reported Jul 2026 | Practice |
SUSuperhuman | Deep Copy a Random-Pointer ListLinked ListHash Table | Medium | Cataloged practice problemPublic catalog signal | Practice |
SUSuperhuman | Deep Copy a Singly Linked ListLinked ListSimulation | Medium | Cataloged practice problemPublic catalog signal | Practice |
SUSuperhuman | Recover a Tree from Preorder Depth EncodingTreeDepth-First Search | Hard | Cataloged practice problemPublic catalog signal | Practice |
SUSuperhuman | Reverse a Singly Linked ListLinked ListRecursion | Easy | Cataloged practice problemPublic catalog signal | Practice |
01 · Preparation plan
Preserve relationships while changing representations.
These selected exercises carry Grammarly-source labels and are temporarily grouped under Superhuman in FastPrep. Grammarly's parent company adopted the Superhuman name, but that identity link does not establish which team conducted an interview. Use this source-qualified, historical practice set for copying structures, intersecting intervals, and reconstructing trees, not as verified Superhuman Mail questions or a current hiring sequence. This is a suggested practice sequence, not the employer's interview process. Your invitation and recruiter guidance remain the source of truth.
- 01
Copy a graph-shaped list without shared references
The random-pointer list exercise makes deep-copy semantics visible. Every copied pointer should refer to copied state, including pointers that point backward or to the same node.
- Test self-references and null random pointers.
- Keep original-to-copy identity mapping clear.
- Verify that mutating a copy leaves the original unchanged.
- 02
Intersect ranges without skipping candidates
Use interval intersections to reason about ordered input and safe pointer advancement. Clarify whether a shared endpoint counts as an intersection.
- Test one list ending early.
- Handle nested and touching intervals.
- Explain which pointer advances and why.
- 03
Reconstruct depth-encoded structure
The preorder-depth exercise is a parsing and stack task. A node's depth determines which ancestors remain active as the traversal proceeds.
- Separate value parsing from depth counting.
- Test a deeply nested chain.
- Validate transitions that skip an impossible depth.
02 · Broader technical practice
Practice beyond standalone coding questions.
These public Superhuman-tagged exercises cover additional technical formats. They are included only when a verified catalog record and a crawlable practice page both exist.
03 · Evidence boundary
What “Superhuman interview questions” means here.
It means practicing transferable implementation, testing, and technical reasoning with public catalog assets FastPrep tags to Superhuman. It does not mean FastPrep has access to the company's assessments or any private interview bank.
Repeated public sightings and last-reported dates can help you prioritize practice, but they cannot predict the questions, format, or platform in a specific interview.
- Only Superhuman-tagged FastPrep catalog problems appear above.
- Stage labels and report dates remain visible as context.
- No official, private, leaked, or proprietary questions are claimed.
04 · Plain answers
Superhuman interview practice questions, answered plainly.
This page owns technical-practice intent for Superhuman. Hiring activity, timelines, and market signals remain on the separate hiring-insights page.
01Why do these Superhuman exercises mention Grammarly?
The original reports use Grammarly labels; one also has a Superhuman thread title. FastPrep's attribution is temporary. Although the parent company is now named Superhuman, that does not independently verify the interview team or make these Superhuman Mail questions. The selected tasks are source-qualified practice interpretations, not authenticated current interview questions or product architecture. Read each source note and confirm present role requirements separately.
02Is FastPrep affiliated with Superhuman?
No. FastPrep is an independent interview-preparation product and is not affiliated with Superhuman. The page uses FastPrep's public practice catalog and does not claim official, private, leaked, or proprietary employer questions.
03How are Superhuman problems assigned to interview stages?
Stage labels come from FastPrep's public problem metadata. A problem can carry more than one reported stage, and hiring processes can change by role, level, location, and date. Treat the labels as preparation context, not a guarantee.
04Which Superhuman interview stage should I practice first?
Start with the stage named in your invitation or recruiter message. If no stage is known, use the largest available set to build general problem-solving fluency, then rehearse explanation and testing separately.
05Does this page predict the Superhuman interview process?
No. Public catalog counts, stage tags, and last-reported dates can help prioritize practice, but they cannot predict a specific interview's questions, sequence, timing, or platform.
Your next stage, made concrete
Pick a problem. Solve it end to end.
Start with the stage named in your invitation, then use public evidence as context—not as a promise of what you will be asked.
Open the practice set