Prerequisites for starting "KodeKloud Engineer"

Can someone tell what all scripting languages, tools one should know to start the kodekloud engineer program?

KKE combined different tasks that reflect what DevOps engineers, system admin, or architect will face in a real-life job. It could be Docker, Kubernetes, Linux, or Bash script…
You’re encouraged to start it and learn while doing it, don’t worry if you lack something, you will learn it along the way.

Thanks,
Trung.