It wasn't until I walked in at 9AM, I came to know that it was a startup. Manoj, who was our super senior at Mission R&D, came forth and introduced himself. He enquired about our interests. During the discussion, we told that we did not have our breakfast. He then gave us about twenty minutes to have it. After we're done with the it and came back to the office, they asked us to take our laptops out. That is when it began. We were all given a problem. Just one problem and forty minutes of time to solve it. The problem statement goes like this. Given a number, n representing the number of bits, find the number of the possible binary strings of length n, such that there are no consecutive ones. At Mission R&D, they expect us to write our own test cases and not rely on online platforms. A small logic struck my mind and I had a lead. However, I wrote the brute force code and put it safe incase things don't work out. I started solving it on paper and after