title: Where is "null" in memory
body: <p>In java, you cannot state an array's size in its declaration</p>
  
  <pre><code>int[5] scores;  //bad
  </code></pre>
  
  <p>I'm told this is because the JVM does not allocate space in memory until an object is initialized. 
  If you have an instance array variable (auto initialized with a default value of null), does that variable point to a place in the heap indicating null?</p>