When it comes to orchestration, MCollective (Marionette collective) packs a punch. You may do operations on thousands of servers all at once by utilizing premade plugins or creating your own. So, MCollective allows you to execute parallel jobs seamlessly. It uses a publish/subscribe message queue to send the commands to the parallel systems. Its ease of use made most organizations look for a system administrator with MCollective knowledge. You can consider it to be one of the most crucial puppet interview questions and answers.