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Question: INPUT {'a':{'b':5},'c':{'d':6, 'e':{'f':6}}} OUTPUT { 'a.b':5, 'c.d':6, 'c.e.f':6 } I was giving interview for a Bangalore based startup, I have done assignments, after assignment round screening i got interview today. At the end of the interview last 15 minutes interviewer gave this question and come up with logic. I was thinking about stack, two pointer approches, he told these approaches are time consuming try to come up with solution using recursion. Also he asked me to explain time complexity of the recursion solution. I don't know why this question didn't feel easy for me, that too when he told not to use stack or two pointer felt like my hands are tied. I Couldn't solve this question he told time up in 10-15 minutes. And before wrapping up the interview I asked for the feedback. He told this problem isn't the hard one, very easy one you couldn't solve it. I thought I have done well throughout my interview like project, previous experience, assignment discussions. Also i thought I'm not that bad in DSA, of course not FAANG level, atleast i can solve easy and medium level Leetcode problems. But after this interview my confidence is gone. What the fu*k I'm doing in my life, i think i should quit my career in tech I feel. Company was very small tech startup from Bangalore has less 50 people I guess. This was SDE intern role. 30-35k was the stipend.