Whetstone
0day streak

Daily practice for engineers

Stay sharpon what you actually get asked

System design, APIs, SQL and the conversations around them. Five questions a day, scheduled so the ones you get wrong come back before you forget them.

Security Fundamentals

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What is the difference between authentication and authorisation?

925Questions
79Topics
11Tracks

Free, and it works without an account.

How it works

A few minutes a day

Five questions, then you are done. Short enough to do before a stand-up, and the daily target moves if five is the wrong number for you.

Revision that finds you

Anything you get wrong returns sooner, anything you know solidly gets out of your way. You never have to decide what to revise.

Somewhere to go next

Every answer names the ideas behind it and links out, and each topic has a written explanation you can read on its own.

What is covered

Start with today's ten

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Start today's drill