title: Are shared preferences stored in memory during runtime?
body: <p>Are shared preferences in Android always read at startup and stored in memory during runtime? If not, are there more efficient ways to read preferences than this?</p>
  
  <pre><code>settings = getSharedPreferences("myPrefsFile", 0);
  int answer = settings.getInt("ULTIMATE_QUESTION", 42);
  </code></pre>