title: NSUserDefault persisance advantages and disadvantages?
body: <p>I am new to NSUserDefault</p>
  
  <p>1) what kind of data can we store in NSUserDefault and cant we store in NSUserDefault?</p>
  
  <p>2) can We achieve  RDMS concepts in NSUserDefault like SQlite?</p>
  
  <p>3) where is it stored and can we acces it directly like Sqlite?</p>