1st interview - What is LDAP - What is DNS? Their ports ? What protocol do they use? - How do i list hidden files? - What are the diff records in DNS? - Differences - A web server is running slow and I got alerted about it - Firstly, i don't have access to the server. How can I verify the server is up and running? - Secondly, Now you got access to the server and found out that it is short on storage. How would i troubleshoot? - What are inodes? - How do I check it? - What is the diff between top and htop - Also what do they display - How to copy files to a remote system? - What are public and private ips? - What are the different ways to get an IP address? - What is DHCP? What is mac address? How does ARP work? - How to schedule jobs in linux? - Tell me about a time when i had to learn something new in a short period of time? - Was give a log script and asked to print all the unique ips Loop 1st Interview Scripting Question. Parsing a log file A time when i put myself in an uncomfortable situation A time when i had limited resource and had to troubleshoot the problem 2nd interview A time when i didn't meet customer needs due to business A time when i failed to meet deadline A time when i went beyond A time when i tried support the business outside my role 3rd Interview A time when i had limited knowledge abt a something and had to create a solution A time when what to go through logs and gather data to a problem A time when i did something without consulting my manager Linux - Troubleshoot nginx service crashing - how can i make sure this doesn't happen again? metrics i can trace? - troubleshoot service 503 error - troubleshoot service not able to reach backend - Troubleshoot storage full issue - Files deleted but still shows disk full whats the issue - what is /proc - Does it use indoes - What are inodes - Where are the systemd timers configs located Network - Troubleshoot server cannot resolve of db - How can i monitor the network packets and netowkr stats - DDOS protection - how can i block ip address on a linux server - DNS process (resolver + dnssec + tcp handshake) - protocol - when does it use tcp and udp Also mitigation for all of the above 4th Interview Tell me abt a time when you had to do deep inspection or troubleshooting Tell me abt a time when you brought down a critical system Tell me abt a time when you helped a friend/colleague Tell me abt a time when you prioritize similar tickets What do you think is a good alarm What is observability and types What is scalability what is reliability What make a reliable server What makes a good metrics