Rajesh Kumar

OpenStack What components/projects of OpenStack are you familiar with? Can you tell me what each of the following services/projects is responsible for?: Nova Neutron Cinder Glance Keystone…

GCP Explain GCP’s architecture What are the main components and services of GCP? What GCP management tools are you familiar with? Tell me what do you know…

Azure Explain Azure’s architecture Explain availability sets and availability zones What is Azure Policy? What is the Azure Resource Manager? Can you describe the format for ARM…

What are the advantages of MongoDB? Or in other words, why choosing MongoDB and not other implementation of NoSQL? What is the difference between SQL and NoSQL?…

How do you know if a certain directory is a git repository? How to check if a file is tracked and if not, then track it? What…

What is Prometheus? What are some of Prometheus’s main features? Describe Prometheus architecture and components Can you compare Prometheus to other solutions like InfluxDB for example? What…

Explain monitoring. What is it? What its goal? What is wrong with the old approach of watching for a specific value and trigger an email/phone alert while…

Explain what Terraform is and how does it works What benefits infrastructure-as-code has? Why Terraform and not other technologies? (e.g. Ansible, Puppet, CloufFormation) True or False? Terraform…

Virtualization Explain what is Virtualization What is a hypervisor? What types of hypervisors are there? What are the advantages and disadvantges of bare-metal hypervisor over a hosted…

Operating System What is an operating system? What is “virtual memory” and what purpose it serves? What is demand paging? What is copy-on-write or shadowing? What is…

Linux What is your experience with Linux? Explain what each of the following commands does and give an example on how to use it: Explain each field…

Network What is Ethernet? What is TCP/IP? What is a MAC address? What is it used for? When is this MAC address used?: ff:ff:ff:ff:ff:ff What is an…

AWS Global Infrastructure Explain the following Availability zoneRegionEdge location IAM What is IAM? What are some of its features? Given an example of IAM best practices? What…

What is Cloud Computing? What is a Cloud Provider? What are the advantages of cloud computing? Mention at least 3 advantages Pay as you go (or consumption-based…

What is Jenkins? What have you used it for? Jenkins is an open source automation tool written in Java with plugins built for Continuous Integration purpose. Jenkins…

What is Continuous Integration? A development practice where developers integrate code into a shared repository frequently. It can range from a couple of changes every day or…

What is Version Control? Version control is the sytem of tracking and managing changes to software code.It helps software teams to manage changes to source code over…

What is DevOps? You can answer it by describing what DevOps means to you and/or rely on how companies define it. I’ve put here a couple of…

Instant Kubernetes-Native Application Observability Pixie gives you instant visibility by giving access to metrics, events, traces and logs without changing code. Pixie is an open source observability…

Big data, as the name suggests, is a collection of data in massive volumes that grow exponentially with time. The data is of a larger size and…

This is the best for www and for HTTPS, for proxy and no proxy users Example Code – 1 – Forcing the domain to serve securely using…

Routing All Laravel routes are defined in your route files, which are located in the routes directory. These files are automatically loaded by the framework.The routes/web.php file…

Packer AWS – Builders & Provisionars – aws-ubuntu.pkr.hcl Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech…

Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel stories at Holiday…