OneOrigin Full Stack Developer interview questions

1. My first round was telephonic round, i was around 15 minutes. some basic question were asked like Tell me about yourself, best project on which you work, some basic question from Node.js and React.js. and it was easy. 2. My second round was technical Interview round, the time slot was of 45minutes but it extended over 1 hour. most of the question was scenario based questions such as: + how synchronous code execution different from asynchronous execution, + how do you handle API calls. + if you have 50 API , and only one is correct how do find which one is correct. + what are middlewares and types of middleware. + some more question from Node.js, Javascript, HTML, CSS and React.js. There was no response from HR team. it about 18 days from interview, I have sent follow up mail and make a phone call to HR, but she was not answered.