Saving Data on Android

Roms Entities
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Crea/ng your rela/ons
As briefly mentioned in the previous chapter, you will only need to create one 
relationship between the entities in your app, and its ER diagram looks like this:
One to Many relation between Question and Answers
Why don't you use your recently acquired knowledge to guess which kind of 
relationship is this?
Well, if you said "a one to many relationship," you are correct.
With the above ER diagram, you are saying: "One question can have one or more 
answers and each answer can only be related to one and only one question". Just 
think about it and it makes a lot of sense since each question of the DroidQuiz app 
will have at least one correct answer and two incorrect answers. The beauty of this 
design is that you can easily expand it or modify it to have something like two 
correct answers and two incorrect answers or 3 correct answers and 2 incorrect 
answers... You get the point.
Now, you will see how easy it is to define foreign keys and one to many relationships 
between your Room entities. In fact, you can do it by adding a single line of code.
Open the