title: Can two callbacks execute the code at the same time(Parrallely) or not?
body: <p>I am doing an <code>IO</code> wait operation inside a for loop now the thing is when all of the operations terminates I want to send the response to the server. Now I was just wondering that suppose two <code>IO</code> operation terminates exactly at the same time now can they execute code at the same time(<code>parallel</code>) or will they execute serially?</p>
  
  <p>As far as I know, as Node is <code>Concurrent</code> but not the <code>Parallel</code> language so I don't think they will execute at the same time.</p>