Effective and efficient technical task for interviews

The technical task is an integral part of selecting a QA specialist in the team to check his/her hard skills. On the one hand, it should not be too boring and voluminous to not discourage the candidate's desire to fulfil it. On the other hand, it is indicative of assessing the candidate's skills so as not to spend too much time on unsuitable ones. 

We came up with an assignment that managed to combine both of these aspects.