🐧 Linux Beginner
How do Linux file permissions work, and what does chmod 755 mean? ▸ 🐧 Linux Beginner
What is the difference between a hard link and a soft (symbolic) link? ▸ 🐧 Linux Intermediate
A server is running out of disk space. How do you find what is using it? ▸ 🐧 Linux Intermediate
How do you find and kill a process that is consuming high CPU? ▸ 🐧 Linux Beginner
What is the difference between a process and a daemon? ▸ 🐧 Linux Advanced
Explain what happens when you run a command in a Linux shell. ▸ 🌐 Networking Beginner
Walk through the TCP three-way handshake. ▸ 🌐 Networking Beginner
What happens, step by step, when you type a URL into a browser? ▸ 🌐 Networking Intermediate
What is the difference between TCP and UDP, and when would you use each? ▸ 🌐 Networking Intermediate
A service is unreachable. Which tools do you use to diagnose it? ▸ 🌐 Networking Intermediate
What is a subnet and what does a /24 CIDR mean? ▸ 🌐 Networking Beginner
What is the difference between HTTP and HTTPS? ▸ 🔀 Git Beginner
What is the difference between git merge and git rebase? ▸ 🔀 Git Beginner
What is the difference between git fetch and git pull? ▸ 🔀 Git Intermediate
How do you undo the last commit while keeping the changes in your working directory? ▸ 🔀 Git Intermediate
What is the difference between git reset and git revert? ▸ 🔀 Git Intermediate
How do you resolve a merge conflict? ▸ ⚙️ Scripting Intermediate
What does "set -euo pipefail" do at the top of a Bash script? ▸ ⚙️ Scripting Beginner
What is the difference between single and double quotes in Bash? ▸ ⚙️ Scripting Beginner
What does the shebang line (#!/bin/bash) do? ▸ ⚙️ Scripting Intermediate
In a regex, what is the difference between greedy and lazy matching? ▸ ⚙️ Scripting Beginner
Why is Python popular for automation and DevOps tasks? ▸ 🐳 Docker Beginner
What is the difference between a Docker image and a container? ▸ 🐳 Docker Beginner
How do containers differ from virtual machines? ▸ 🐳 Docker Intermediate
What is the difference between an image layer cache and why does Dockerfile order matter? ▸ 🐳 Docker Intermediate
What is a multi-stage build and why use one? ▸ 🐳 Docker Intermediate
How do you persist data in Docker, and what is the difference between volumes and bind mounts? ▸ 🐳 Docker Beginner
What does "docker run -p 8080:80" do? ▸ ☸️ Kubernetes Beginner
What is a Pod in Kubernetes? ▸ ☸️ Kubernetes Intermediate
Describe the main components of Kubernetes architecture. ▸ ☸️ Kubernetes Intermediate
What is the difference between a Deployment and a StatefulSet? ▸ ☸️ Kubernetes Intermediate
How do Services and the different Service types work? ▸ ☸️ Kubernetes Intermediate
What is the difference between a ConfigMap and a Secret? ▸ ☸️ Kubernetes Advanced
A Pod is stuck in CrashLoopBackOff. How do you debug it? ▸ 🟧 AWS Beginner
What is the difference between an IAM user and an IAM role? ▸ 🟧 AWS Beginner
What is the difference between a Region and an Availability Zone? ▸ 🟧 AWS Intermediate
Explain S3 storage classes and when to use them. ▸ 🟧 AWS Intermediate
What is a VPC and what are its key components? ▸ 🟧 AWS Intermediate
What is the difference between a security group and a network ACL? ▸ 🟧 AWS Beginner
When would you use AWS Lambda instead of EC2? ▸ ☁️ Azure Beginner
What are the three cloud service models (IaaS, PaaS, SaaS)? ▸ ☁️ Azure Intermediate
How does Azure RBAC work? ▸ ☁️ Azure Intermediate
What is the difference between a resource group and a subscription? ▸ ☁️ Azure Intermediate
What is Azure Key Vault used for? ▸ ☁️ Azure Beginner
What is a managed identity in Azure? ▸ 📜 Terraform / IaC Beginner
What is Infrastructure as Code and why use it? ▸ 📜 Terraform / IaC Intermediate
What is the Terraform state file and why does it matter? ▸ 📜 Terraform / IaC Intermediate
Why and how do you use remote state with locking? ▸ 📜 Terraform / IaC Beginner
What is the difference between terraform plan and terraform apply? ▸ 📜 Terraform / IaC Intermediate
What are Terraform modules and why use them? ▸ 🔁 CI/CD Beginner
What is the difference between Continuous Integration, Delivery, and Deployment? ▸ 🔁 CI/CD Intermediate
What are blue-green and canary deployment strategies? ▸ 🔁 CI/CD Beginner
What are the typical stages of a CI/CD pipeline? ▸ 🔁 CI/CD Intermediate
Why should you never store secrets in your pipeline configuration or repo? ▸ 📊 Observability Beginner
What are the three pillars of observability? ▸ 📊 Observability Intermediate
How do Prometheus and Grafana work together? ▸ 📊 Observability Beginner
What is the difference between monitoring and observability? ▸ 📊 Observability Intermediate
What makes a good alert? ▸ 🔐 Security Beginner
What is the principle of least privilege? ▸ 🔐 Security Intermediate
What is the difference between authentication and authorization? ▸ 🔐 Security Intermediate
How should secrets be managed in a modern infrastructure? ▸ 🔐 Security Intermediate
What are common ways to secure container images? ▸ 🛡️ SRE Beginner
Explain the difference between SLI, SLO, and SLA. ▸ 🛡️ SRE Intermediate
What is an error budget and how is it used? ▸ 🛡️ SRE Beginner
What is a blameless postmortem? ▸ 🛡️ SRE Intermediate
What is the difference between high availability and disaster recovery? ▸ 🛡️ SRE Intermediate
What are the steps of effective incident management? ▸