Ask HN: Does anyone use hackerrank to prepare for an interview?

I am ready to look for a job, I understand that some employers will do online tests on hackerrank, so I signed up for hackerrank, the website generated some interview preparation questions for me, currently I have completed more than 20, but the problems I found are:<p>1. Some questions cannot pass the test case, and the question has error. I looked at the discussion of the question, Many people have already reported that the problem exists a year or two ago and have not been resolved.<p>2. The descriptions of many problems are very long and difficult to understand, and are not human-readable. What I am doing now some basic problems, the solutions is not difficult, but it takes a lot of time to read and understand the topic. (Especially English is my second language)<p>Now I&#x27;m a little unsure if I should continue to invest time in this。Why haven&#x27;t these obvious errors been fixed? What&#x27;s the point of doing these brain teasers programming games?<p>(Please forgive that the above text is generated by Google Translate by Chinese, there may be grammatical and lexical errors, but it should not affect the expression of meaning)