Cloudflare interview questions

41 questions15 coding5 system design21 behavioral7 freeUpdated

This is every question in the Cloudflare guide, in one list: 15 coding problems, 5 system designs and 21 behavioral questions, drawn from what candidates report about Cloudflare interviews.

Each row shows the round it comes from and links to the lesson that works through it. 7 are free to read in full. The other 34 are Premium, and here you still see their round, difficulty and topic, so you know what you're walking into.

Cloudflare coding interview questions

15 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.

13Sum: Sorted Two-PointerFreeMediumArrays, Strings & Hashing
2Top K Frequent Elements: Count Then SelectFreeMediumArrays, Strings & Hashing
3Minimum Window Substring: Sliding WindowFreeHardArrays, Strings & Hashing
4LRU Cache: Hash Map Plus Doubly Linked ListFreeMediumHash Maps & Design
5Multi-Level Rate Limiter: Composite-Key Fixed WindowFreeMediumHash Maps & Design
6Design Hit Counter: Trailing-Window Ring BufferFreeMediumHash Maps & Design
7Premium medium problemMediumTrees & Graphs
8Premium medium problemMediumTrees & Graphs
9Premium medium problemMediumTrees & Graphs
10Premium medium problemMediumDynamic Programming
11Premium medium problemMediumDynamic Programming
12Premium medium problemMediumDynamic Programming
13Premium medium problemMediumHeaps & Intervals
14Premium medium problemMediumHeaps & Intervals
15Premium medium problemMediumHeaps & Intervals

Cloudflare 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 a CDNFree
2Design DDoS Mitigation (Premium)
3Design a Distributed Rate Limiter (Premium)
4Design DNS at Scale (Premium)
5Design a Global Edge Key-Value Store (Premium)

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

Cloudflare behavioral interview questions

21 questions, grouped by what the interviewer is testing. The lesson explains why each one gets asked and what a strong answer covers.

Why Cloudflare (3)

All 3 are Premium

Owning a production mistake (3)

All 3 are Premium

Principled judgment under ambiguity (3)

All 3 are Premium

Curiosity about how the Internet works (3)

All 3 are Premium

Communicating across functions (3)

All 3 are Premium

Ownership across the finish line (3)

All 3 are Premium

Empathy and inclusion (3)

All 3 are Premium

Read the Cloudflare behavioral questions

See all 41 Cloudflare questions by name

Premium opens the 34 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 Cloudflare interview guide?

41: 15 coding problems, 5 system designs and 21 behavioral questions. The guide was last updated in November 2026.

Which rounds do these Cloudflare interview questions come from?

All 15 coding problems come from the coding rounds. The 5 system designs and 21 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 Cloudflare interview questions are free?

7 of the 41 are free to read in full, marked Free in the list. The other 34 come with Premium, which also opens all 100 company guides.