Hi,
Can I create a menu without prompt node inside it? I want to add propmts dynamically from menu.java file. Will this work?

One more question,
Suppose I create a menu node in OD, corresponding menu.java file will be created.Will that java file gets automatically deleted if we remove menu node from application.
Because I am seeing many old java files even though their correspoonding nodes are removed in application.

Yes, you can create your own prompts and phrases. See some of our sample apps like DynamicPhrases for some ideas. You can also search this forum for past threads on it.

We don't delete java files if the node is deleted. The reason for that is in case someone has custom code in those files. You have to delete the files manually if you delete the node.