Exploring Virtualization and Hypervisor Management

This session is checking the knowledge of Virtualization and Hypervisor. Some directly related to Openstack and few virtulization in general.

Introduction

As the demand for efficient and scalable infrastructure continues to grow, OpenStack has emerged as a leading open-source cloud computing platform. OpenStack engineers play a crucial role in designing, deploying, and managing virtualized environments powered by hypervisors. To ensure that the candidates possess the necessary expertise, it is important to ask them relevant questions during interviews. In this blog, we will explore ten insightful questions commonly asked while interviewing OpenStack Engineers. These questions delve into various aspects of virtualization, hypervisor management, and troubleshooting. Let’s dive in!

Questions

  1. Assume your hypervisor was overloaded with a lot of virtual machines, and one of the virtual machines needs more memory. How will the hypervisor handle this situation?

  2. Assume one of the guest virtual machines is trying to gain access to the host operating system. How will the host operating system handle this situation?

  3. What are the possible root causes when you see a virtual machine in an ERROR state?

  4. What prerequisite checks occur behind the scenes when you initiate a Live Migration?

  5. When you initiate a Live Migration, what exactly happens in the background?

  6. Write a command to list the IP addresses of all compute hosts bound on interface bond0.135.

  7. When you run the top command, and the ST (Steal Time) value is 0.1, what does it mean?

  8. What proactive actions would you take when a hypervisor starts swapping memory?

  9. When you encounter the error “No Hypervisor available” in the GUI or API call, what does it imply?

  10. What is KVM Paravirtualization?

By exploring these questions, interviewers can assess the depth of a candidate’s knowledge in areas such as hypervisor management, virtual machine troubleshooting, performance optimization, and more. OpenStack Engineers play a crucial role in building and maintaining robust cloud infrastructures, and these questions will help identify candidates with the right expertise and experience. Now, let’s dive into the answers and understand the intricacies of managing virtualized environments with OpenStack!