Doubt regarding the course content flow

#1

I’m starting the course from the very beginning. and I’m on View Binding[java] section and I’m not just able to picture something that till now we were learning kotlin and now all of a sudden there is some java section and there is kotlin and then again there is some java.

So what is the actual flow of this? Do we have to combine both java and kotlin or is it something else, please guide me here.

Doubt about java sections in cource
#2

Some modules are older so they contain java code. New modules have kotlin code. Also we are constantly converting our older java modules into kotlin code. Ideally you should learn both java and kotlin. It will help in future since kotlin code is converted into same bytecode as java.