Basic string implementation, dfs/recursion, API/JSON

The screening test was several stages, the first few were about calling APIs and getting the answers from the responses in order to advance to the next stage. The final response was a list of strings formed by encoding a valid URL using the base64 scheme, splitting the encoded URL after every N (forgot the number) characters and shuffling the split strings. We had to construct the valid URL from the list of randomly arranged strings. Once generated, we could go to the final form and submit it.