First round was with the Manager. He asked about the project as I developed it from scratch, so it went well, and he asked a lot of good questions.

Second round was with a Sr. Staff member. He wasn't sure what to ask. I mentioned I had worked a little bit on Node.js, and he asked only about Node.js. It seems that he was good at Node.js.

I was asked about MQTT vs. HTTP (I don't know how a person can ask the difference between these two).

1. Round 1: About Project and then cross-questioning. I was asked about negative acknowledgment.

2. Round 2: Technical Round. I was asked to take a dynamic array and find its median. I didn't understand what he meant by 'take a dynamic array' initially. At the end, he clarified that a dynamic array means the user will provide input at the start of the program, and then I have to find the median. I was surprised.

Firstly, I solved it using a Priority Queue. I thought I would get a stream of data, as he said 'dynamic array' and 'you will get data during the process'.

Second question: Find the frequency of a string. I solved it using a Map within 2 minutes.