What happens when you enter a website in the computer browser? What is DNS zone? What is DNS cache and how it works? What is traceroute and how is it created? Types of DNS records? How does a session get established in TCP? What are the use cases for UDP? How is UDP different from TCP? How does HTTP get secured? If client A and client B have public key, can they decrypt each other sessions? What is a container and concepts around it. Technologies that allow/run containers (that are not in AWS). How would you protect yourself against DNS poisoning or other DNS attacks? Difference between SQL and NoSQL. Use cases for NoSQL. How would you troubleshoot a performance issue on Windows server. What tools would you use and how? Name some languages that do not need a compiler and what are their advantages? What is the black/red environment setup? What is the recent project you are most proud of, why and what was your role? Can you give me an example where you resolved a complex technical problem with a simple solution?