To disable comments in Drupal 8, there are two parts.
Using Drupal Admin
  • First of all, login to your Drupal admin area
  • Now, go to the Administrator tab, then Content tab and finally click on the Content Types.
  • Now, click and edit the content type you prefer to disable the comments for.
  • Lastly, you must ensure the comments are on ‘OFF’ mode by default

If you’re using Drupal 7.x/8.x use the following method to disable the comments:

  • Login to your admin area
  • Go to Structure -> Content -> Types ->Comment Settings
  • Select the option 'Closed' present under 'Default comment setting'
  • Save the changes
By executing an SQL query

Deleting/disabling the comments can also be executed by the SQL query in the phpMyAdmin. Here are the steps to follow:

Execute this SQL query in your database

UPDATE system SET status = ‘0’ WHERE filename = ‘modules/comment/comment.module’;

If you would like to reverse the effect, i.e. enable comments at a later stage, simply change the SET status = ‘1’

BY Best Interview Question ON 12 May 2020