Hi all ! It is my turn to contribute a bit to this community. I recently did the online assessment of Cisco for a Europian country. The test had 90 minutes and was composed of three questions.The questions asked were the following (I dont remember exactly the order):

1. Is this a S-expression (tree) . You can find some variations of this question online. Unfortunately I did not have time to tackle this question.
2. Paths in a warehouse.
   Basically you were given a 2d matrix of 0-s and 1-s and you had to specify how many possible paths were from (0,0) to (m,n). Some DFS/2D Dynamic Programming question.
3. The third question was this Group division question.
   There you had to count the minimum number of groups formed such as there is a maximum difference between the smallest and the largest numbers.

So question 2 and 3 were kind of okayish not too difficult. I did not have too much of time because I was doing this application without doing practice within the last 6 months. What I see from the online assessment you really have to be proficient in topics such as Tree,Dynamic Programming,DFS/BFS.