These are some interview questions (the ones I could remember), which I received while interviewing for DevOps roles.

• What’s a PTR in DNS?
• What’s a MX record in DNS?
• Difference between RAID 1 and 5?
• What’s the advantage of one RAID over another?
• Alternative to init.d in Linux?
• How to view running processes in Linux?
• Difference between authorization and authentication?

Common sense: any question that could be answer by Google in 5 seconds should not be used to test any one.

Have more to add? Comment below and I will add it here.