I got the hackerrank test link, it says it will be 75 mins long. Has anyone gave the similar test, want to know about the difficulty level and no. of questions.

I applied via careers portal.

Update - Thanks you all for your advice, I have given the test, there were 4 problems. Quesitons were on easy - medium side, first three problems were straight forward and 4th is little trickier and took more time to build logic but I was able to come up with solution. Problems consists of hash table and string manipulation.
All test cases passed. :)

Edit [Oct 12] - Anyone heard back from Twitter, either rejection mail or any kind of aknowledgement from Twitter ?