What is CI/CD, what is the term "master agent," what is Idempotence, main configuration tools, branch checking commands, 3 states of a Git repository, benefits of a DVCS, how to configure a public and private segment, how to create a Docker running MySQL, how to replicate files, how to make an app running on port 3000 accessible on port 80, how to allow access to any access on port 80 using iptables, how to mount a volume /dev/sdf1 to a directory /mnt/test, where SSH logs are located, difference between class and object, what are design patterns, difference between where and having, difference between union and join.
