Ravin

A few choice to check if datatable script is present.
1. Try checking the datatables is loaded in the webpage. You could try checking in Developer Tools. F12 > Sources
2. Try pasting the datatables javascript directly into Console in Developer Tools. If the script is present it should load.
jQuery('#the-table-id').DataTable()
3. You should be able to check the datatable is present in jQuery. Type this into Console in Developer Tools.
jQuery.fn.DataTable

https://i.imgur.com/bZP2sPX.png

Hello chandanraikar, you could try to place the javascript in your theme and echo the path via wp_footer hook.

<?php
add_action( 'wp_footer', function() use() {
   $script = "/javascript_path";
   ?>
   <script type="text/javascript"><?php echo $script;?></script>
   <?php
   }
});

WordPress has a guide for its famous 5 minutes install. https://codex.www.ads-software.com/Installing_WordPress#Famous_5-Minute_Install

Maybe you could provide a translation to ASL.

WordPress will not run without hooks.

Do you see any errors? Javascript or php errors?