Javascript src with question mark
<p>I have a question. In old project that I'm currently working on I have found this code:</p>

<pre><code>  &lt;script type="text/javascript" language="Javascript" src='&lt;%= Page.ResolveUrl("~/javascripts/CardConnectorManager.js?2016071203")%&gt;'&gt;&lt;/script&gt;
</code></pre>

<p>I have:</p>

<ul>
<li>/javascripts/CardConnectorManager.js</li>
</ul>

<p>but don't have</p>

<ul>
<li>/javascripts/CardConnectorManager.js?2016071203</li>
</ul>

<p>What that question mark is doing and why anybody write such thing?
Maybe this file exists only on server on some bulid stuff thing?</p>