r/CS_Questions

1.2K archived posts · Nov 2011 – Sep 2026

Computer Science Interview/Challenge Questions

r/CS_Questions

Archived posts from r/CS_Questions, Nov 2011 to Sep 2026.

Created Nov 13, 2011

11KMembers (last snapshot)

1.2KArchived posts

Heard a challenging and interesting interview question or programming challenge?

Share them here!

All code will automatically be spoiler tagged. Type 4 spaces in the front of the line to make code.

Example:

//this is code!

Spoiler tag your written explanations everyone gets a chance to enjoy :)

Spoiler Tag: Spoiler tag

Rules:

Please use pastebin if you wish to post an answer in the opening post. Do not post it with spoiler tags; some people have subreddit style turned off and will still see the solution.

This is not about providing any advice on landing a job, just for solving interesting questions :)

For better or for worse, interviews tend to be a good source of these.

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