I applied through a recruiter, and the process took three weeks. It was four technical rounds. There were discrepancies between what was written in the job description versus what happened.

• First round: This was supposed to be a get-to-know-you session, but instead, I was asked technical questions about how forms work and how the client and server communicate.
• Second round: This was a HackerRank test of six questions and about 106 minutes of timing. It had MCQs, a CSS grid question, and a question around input fields in React. The questions themselves weren't hard, but getting the test cases to pass was a bit tricky.
• Third round: This was technical as well, which was expected. It was a 45-minute round of theoretical questions around JS and its event loop, design patterns, and SOLID principles. It also had a live coding task.
• Fourth round: This was supposed to be an executive and behavioral round, as stated in the description, but it ended up being another 45-minute technical round. Here, the discussion involved dissecting the best product you have worked on. The questions got very technical too.

It's unfortunate that I was rejected after these four rounds, but what was a bit annoying was the generic rejection. I would expect that after four rounds, I would at least get a detailed reason as to why I'm being rejected. It's hard to believe it was a skill issue because then I should have been rejected earlier. Also, I'd recommend reducing the number of rounds or, at least, reducing the time taken to complete the interview process. Mine spanned across three weeks, and the anxiety that came with it was nerve-wracking.

Explain SOLID principles and give a case study for each.