Can I Use string.xml resources as a data base?

I'm using in my Flashcards app strings.xml (value folder) as a database from where I extract the Questions & answers. Some colleagues told me that I'm miss-using string.xml!? I really don't see any drawback using strings.xml as a database? Do you agree with me regarding this point? Do yo have better solution I mean better source code of a flashcards app to learn from it the best practices.

here is my code:

resId1=getApplicationContext().getResources().getIdentifier(
                "textname" + 1, "string", getPackageName());

        tex1=getResources().getString(resId1);

Many thank for your thoughts and assistance.