[ThePhysicist]

A lot of companies just put up "laundry lists" of requirements when writing job ads. Often HR asks the developers / team lead what they are looking for and which qualifications a candidate should have and they just respond with all the tools and languages they use, which then all end up in the job ad. Also, many companies that mostly use legacy tech put put modern tech keywords in there to appeal to candidates, since most developers find it more "sexy" to work with K8s and Docker than an outdated Jenkins & Tomcat based workflow.

I wouldn't be too concerned about that, you can have a look at the most important technologies and get a basic understanding of them, which should be enough to get you through most interviews. Often they're just part of the workflow and most developers just know enough about them to fulfill their role. For example, most devs know how to create a simple Dockerfile, but only few know the internals of container networking, scheduling etc..