
ChainMemory
Mem0
Memori
Pieces for Developers
cognee
TheSecondBrain.dev
Claiv Memory
Persistent memory for Claude Code, Codex & coding agents

LeetCode
DataLemur
Datacamp
HackerRank
Codecademy
PrepNPlaced
SkillVee
StrataScratch is a data science interview platform that has over 1000+ real interview questions from top tech companies like Facebook, Amazon, Google, and more.

Which is more popular?
Based on our record, StrataScratch seems to be more popular. It has been mentioned 4 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | agent-memory.dev | stratascratch.com |
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Why this product is good
Recommended for
Overall verdict
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Recommended for
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Practice Writing SQL Queries on StrataScratch | How to Solve SQL Queries
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StrataScratch offers free data science interview questions and continues to release interview questions when they come out from companies. This ensures that you are always practicing your data science skills on...
Recommendations tracked on public social media and blogs since March 2021.


Tracking Agentmemory since Jun 2026.
StrataScratch is focused on providing data analysis/science resources needed to land a job and resources for the first few years of your career. It has 600+ coding questions from real interviews where you can use SQL, python, or R. It... Source: over 3 years ago
I learned off of Mode Analytics SQL tutorial. It's free and I use it as a reference when I forget syntax. From there, my learning style is to grind on practical questions that I would get as a data analyst. So I would recommend... Source: over 3 years ago
There was a comment here about using Leetcode, Hackerrank, SQL fiddle, etc to keep learning SQL. However, if you're aim is to go into data analytics you need to go beyond learning syntax and understand edge cases and business context.... Source: over 3 years ago
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