Kind of related to the advice in the blog post, there are a couple things you can do (from an open-minded, kind, curious-and-hoping-to-learn approach and way of phrasing your questions).
- In an interview, if you feel it could have gone better, you can ask your interviewer about better solutions. I have literally done this in interviews that led to an offer - when they get to the point where you ask questions, one of yours can be "I don't feel like I got to a great solution here, can you explain what an efficient solutions would look like, or point me to a reference where I can read up on this"?
- You can ask your recruiter for feedback, or just suggestions for general areas that you can improve. More likely than not, they won't respond or will tell you the policy is not to share anything, but you've already lost out on this job, and one polite inquiry is not going to put a black mark on your record at this company.
- In an interview, if you feel it could have gone better, you can ask your interviewer about better solutions. I have literally done this in interviews that led to an offer - when they get to the point where you ask questions, one of yours can be "I don't feel like I got to a great solution here, can you explain what an efficient solutions would look like, or point me to a reference where I can read up on this"?
- You can ask your recruiter for feedback, or just suggestions for general areas that you can improve. More likely than not, they won't respond or will tell you the policy is not to share anything, but you've already lost out on this job, and one polite inquiry is not going to put a black mark on your record at this company.