There will be 2 technical rounds. Round 1 will be based on your previous work summary and basic core Linux questions. Round 2 most of the questions comes little tougher on OS level , logical scenario based questions.

you have to wait for interview more than 2 hours while interview process is of 3 rounds first 2 rounds are technical and one HR round , In 1ST TECHNICAL round they asked about basic of linux after that they will check your troubleshooting skills they need strong knowledge on partitions having same will be benifit