This is my experience about the first round of SRE intern hiring in linkedin which is done on hackerrank. Out of total 31 questions the exam had 3 coding questions 2 sql questions and rest were CN, OS and unix questions. Everything was easy and more emphasis was given on CN.

Overall it was a good interview process, the coding assesment was very good and had MCQ s as well as dsa questions . practice well and it's not hard to crack.