Dropbox interview questions

44 questions16 coding5 system design23 behavioral14 freeUpdated

This is every question in the Dropbox guide, in one list: 16 coding problems, 5 system designs and 23 behavioral questions, drawn from what candidates report about Dropbox interviews.

Each row shows the round it comes from and links to the lesson that works through it. 14 are free to read in full. The other 30 are Premium, and here you still see their round, difficulty and topic, so you know what you're walking into.

Dropbox 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.

1Find Duplicate File in System: Group by ContentFreeCodingMediumArrays, Strings & Hashing
2Subdomain Visit Count: Roll Up a NamespaceFreeCodingMediumArrays, Strings & Hashing
3Longest Substring Without Repeating: Forward-Only WindowFreeCodingMediumArrays, Strings & Hashing
4In-Memory File System With ls, mkdir, and FilesFreeCodingMediumHash Maps & Design
5Content-Addressed Block Store With DeduplicationFreeCodingMediumHash Maps & Design
6LRU Cache With O(1) Get and PutFreeCodingMediumHash Maps & Design
7Sliding-Window Request Rate LimiterFreeCodingMediumHash Maps & Design
8Premium medium problemCodingMediumTrees & Graphs
9Premium medium problemCodingMediumTrees & Graphs
10Premium medium problemCodingMediumHeaps & Intervals
11Premium medium problemCodingMediumHeaps & Intervals
12Premium medium problemCodingMediumHeaps & Intervals
13Premium medium problemCodingMediumDynamic Programming
14Premium medium problemCodingMediumDynamic Programming
15Premium medium problemCodingMediumDynamic Programming
16Premium medium problemSystem designMediumDesign Block Storage at Scale

Dropbox 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
1Design File SyncFree
2Design Block Storage at Scale (Premium)
3Design the Metadata Service (Premium)
4Design Sharing & Permissions (Premium)
5Design File Search (Premium)

A lock means the design is named here and its walkthrough is Premium.

Dropbox 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.

Ambiguity & self-direction (1)

#Question
3Tell me about a time you got stuck. How did you unblock yourself?Free

Trust, candor & failure (1)

#Question
6Tell me about a mistake you made and what you learned.Free

Handling ambiguity & self-direction (3)

All 3 are Premium

Trust, candor & learning from failure (3)

All 3 are Premium

Read the Dropbox behavioral questions

See all 44 Dropbox questions by name

Premium opens the 30 locked questions on this page, each with the full prompt and a worked answer, and every other lesson in all 100 company guides.

Common questions

How many questions are in the Dropbox interview guide?

44: 16 coding problems, 5 system designs and 23 behavioral questions. The guide was last updated in November 2026.

Which rounds do these Dropbox interview questions come from?

Of the 16 coding problems, 15 come from the coding rounds and 1 from the system design lessons. The 5 system designs and 23 behavioral questions come from the system design and behavioral rounds. Every row in the list carries its round, so you can start with the one you have booked.

Which Dropbox interview questions are free?

14 of the 44 are free to read in full, marked Free in the list. The other 30 come with Premium, which also opens all 100 company guides.