Paytm Software Development Engineer In Test SDET interview questions

There are 3 rounds in selection process. Day 1: It is an online Test held on HackerRank. There are total 17 questions (15 MCQ + 2 Coding Problems). You just need to solve minimum 1 coding problem to get selected in this round. Day 2: It is a Technical Interview and she asked some questions which are listed below. Day 3: It is also a Technical Interview. It could be last round but at before interview get started i got an email from HR that interview was canceled. And next day i got another email which says I didn't clear interview.