I got a phone call from HR that told gave me a home assignment in Codility. There were 3 questions and I got 115 minutes for that.

I answered in IntelliJ and pasted the final answers in the Codility interface.

One of the questions was to create a function that, given a number N, returns the biggest number possible when adding a new digit 5 somewhere in N (for example, given 630 you'll return 6530).

The second question was, given a string S of files description in some file system (names and sizes), you need to return a new string which contains a summary of the files by types, with the total file size of each type (kind of string parsing).