Answer 1

See first of all java and JavaScript are two different things and are poles apart , don't go on the name java and JavaScript.
Advantages of java
1 . Fully oops based
2. Can be used for high end application
3.mostly used for Android development through SDK

Advantages of JavaScript
1. Making web site interactive
2.can be used in IOT based system
3. Can be used to develop web based basic games
4. It's mostly used for web development purposes