Reddit coding interview questions
16 problems, in the order the guide teaches them. Each lesson gives the full problem, a worked solution and the follow-ups interviewers tend to add.
Reddit system design interview questions
5 designs, each worked end to end in its own lesson, from requirements to the architecture and its trade-offs.
| # | Question |
|---|---|
| 1 | Design the Home FeedFree |
| 2 | Design Nested Comment Threads (Premium) |
| 3 | Design Voting at Scale (Premium) |
| 4 | Design Content Moderation (Premium) |
| 5 | Design a Notification System (Premium) |
A lock means the design is named here and its walkthrough is Premium.
Reddit behavioral interview questions
23 questions, grouped by what the interviewer is testing. The lesson explains why each one gets asked and what a strong answer covers.
Mission first (1)
| # | Question |
|---|---|
| 1 | Tell me about a time you did something outside your scope of work. What was it, and what was the outcome?Free |
Make something people love (1)
| # | Question |
|---|---|
| 2 | Tell me about a technical decision that had significant user impact.Free |
Add value (1)
| # | Question |
|---|---|
| 3 | Tell me about a time you needed to deep-dive to find a problem. How did you find it, and what did you do?Free |
Evolve (4)
| # | Question |
|---|---|
| 4 | Tell me about a time you failed, or could not meet a deadline.Free |
Default open (1)
| # | Question |
|---|---|
| 5 | Tell me about a time you disagreed with a colleague or your manager.Free |
Why Reddit (3)
Make Something People Love (3)
Add Value (3)
Default Open (3)
Mission First (3)
See all 44 Reddit questions by name
Premium opens the 33 locked questions on this page, each with the full prompt and a worked answer, and every other lesson in all 100 company guides.