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LEETCODE

4/11/2025

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LEETCODE
​

​If you are thinking about becoming a coder after you have finished school, you likely already know about LeetCode, a software application designed to help you study coding, practice, and improve your coding ability.  It contains a large database of coding problems and exercises that help users to improve their skills, along with sets of tools (editors, debuggers, forums, etc.).  However a portion of LeetCode’s content is also designed to help one prepare for a ‘technical interview’, such as one might encounter if applying for a coding job at a large corporation, with common interview questions, practice algorithms, and data structures that can be used to simulate what might be asked in an interview.  This makes LeetCode an ideal tool for interview preparation, and also provides interviewers with lots of potential coding questions that can be ‘asked’ during an interview.
As is human nature, even the smartest of us has pangs of inferiority (except Elon Musk), as did a sophomore in Columbia’s Department of Computer Science, as he used a self-developed ‘cheating tool’ that improved his interview performance enough to receive employment offers from Amazon (AMZN) , Meta (FB) TikTok (pvt) and Capital One (COF).  The cheating tool (named ‘Interview Coder’) acts as an invisible plug-in that cannot be detected by software used for remote test monitoring and is able to create perfect answers to questions with a few minor flaws.  That said, after it was discovered that the sophomore had cheated on his interviews, he was expelled. 
Interviewers look for those that are constantly glancing at the right or left during interviews, or those that are just a bit slower to answer a verbal question (waiting for the answer to come up on another computer), but the ‘Interview Coder’ is much smarter than that and was specifically designed to deal with LeetCode content.  Interviewers favor LeetCode content because it is easier to pull questions from LeetCode than it is to write hundreds of original ones. However ‘Interview Coder’s’ ability to be a ‘hidden’ window and to use system permissions  to bypass the browser’s recording processes, while it remains an open widow on the cheaters computer that can be queried without any cursor movement or keyboard tracking.  It can even break down complex or ambiguous questions into sections to make sure the cheater can answer them with a complete level of understanding and can copy them directly to the test, with a few spelling or grammatical errors thrown in.
Looking to capitalize on his new application after his fall from grace at Columbia, the former sophomore put the app on Github, where it immediately gained large scale recognition.  At a cost of $3,000/month for server support, a $60/month user price, and a 99% profit margin, the app took in $228,500 in its first month, and less than 2 months after its launch it had an annual recurring revenue of $2.2m.  He marketed the application through social media, posting pictures of himself cheating on exams..
LeetCode questions have been long criticized as ~90% having little or nothing to do with actual day-to-day coding work.  Despite that fact, Google (GOOG) uses it for interviews that can take up to 300 hours of answering coding questions.  As the pass rate for those exams is less than 2% it is not surprising that the application is so popular, especially when the typical competitive ratio for a single position garners over 200 interview candidates, making the $60/month fee against a $100,000+ job easy to justify.
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