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 🔸 vi – is one of the most common text editors on Unix.  🔸 vim – is a highly configurable text editor.  🔸 emacs – is an extensible, customizable, free/libre text editor, and more.  🔸 micro – is a modern and…

 Shells   🔸 GNU Bash – is an sh-compatible shell that incorporates useful features from the Korn shell and C shell.  🔸 Zsh – is a shell designed for interactive use, although it is also a…

Ceph Explain what is Ceph True or False? Ceph favor consistency and correctness over performances Which services or types of storage Ceph supports? What is RADOS? Describe RADOS software components…

Big Data Explain what is exactly Big Data What is DataOps? How is it related to DevOps? What is Data Architecture? Explain the different formats of data What is a…

General What is a server? Define or Explain what is an API Tell me about interesting bugs you’ve found and also fixed What is a Debuggger and how it works?…

DNS What is DNS? What is it used for? How DNS works? Explain the resolution sequence of: www.site.com What types of DNS records are there? What is a A record?…

Elastic What is the Elastic Stack? Explain what is Elasticsearch What is Logstash? Explain what beats are What is Kibana? Describe what happens from the moment an app logged some…

Puppet What is Puppet? How does it works? Explain Puppet architecture Can you compare Puppet to other configuration management tools? Why did you chose to use Puppet? Explain the following:…

Security What is DevSecOps? What its core principals? What security techniques are you familiar with? (or what security techniques have you used in the past?) What the “Zero Trust” concept…

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 Identify the service/project…

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 about GCP networking…

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 templates? Explain Azure…

What is OpenShift? How OpenShift is related to Kubernetes? True or False? OpenShift is a IaaS (infrastructure as a service) solution What would be the best way to run and…

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? In what scenarios…

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 is the difference…

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 is an Alert?…

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 value is exceeded?…

Kubernetes What is Kubernetes? Why organizations are using it? What is a Kubernetes Cluster? Kubernetes Nodes What is a Node? What the master node is responsible for? What do we…

Container What is a Container? What is it used for? How are containers different from virtual machines (VMs)? In which scenarios would you use containers and in which you would…

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 follows the mutable…

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 hypervisor? What types…

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 a kernel, and…

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 in the output…

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 IP address? Explain…

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 are Roles? 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 payment) – you…

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 is used to…

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 a week to…

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 time.Version control also…