H
Certification Courses
Want a structured paid program with certificate and roadmap?
Package applications with optimized Dockerfiles and production-ready image workflows.
These are the tools you use in this track and what each tool does in production workflows.
Containers and Orchestration
Docker
Builds immutable container images for consistent runtime behavior.
Containers and Orchestration
Trivy
Container security scanning for vulnerabilities and misconfigurations.
For each tool area: what it is, types, when to use, why it matters, and how to apply it.
Docker
What: Docker packages applications into portable, immutable container images.
Why: Containers make deployments consistent and easier to scale.
Types
When to use
How to use
DevSecOps
What: DevSecOps integrates security controls into delivery workflows.
Why: Shift-left security prevents vulnerabilities from reaching production.
Types
When to use
How to use
What is a Docker image?
Images package app and dependencies.
What is a Docker container?
Containers run isolated processes from images.
Why keep container images small?
Smaller images improve speed and security.
What does docker build do?
docker build packages instructions into image.
What is the purpose of .dockerignore?
It reduces context size and accidental leaks.
What is Kubernetes Deployment?
Deployment handles stateless rollout orchestration.
What is a Kubernetes Pod?
Pod groups tightly coupled containers.
What is a Kubernetes Service?
Services provide discovery and load-balancing.
What does kubectl get pods do?
kubectl queries cluster resources.
What is ConfigMap used for?
ConfigMaps externalize application config.
What is Secret in Kubernetes?
Secrets handle sensitive configuration material.
What is Horizontal Pod Autoscaler (HPA)?
HPA adjusts replica count by load.
What is a liveness probe?
Liveness detects deadlocked/unhealthy processes.
What is a readiness probe?
Readiness gates traffic until app is ready.
What is rolling update in Kubernetes?
Rolling updates minimize downtime.
What is DaemonSet used for?
DaemonSets deploy node-level services.
What is StatefulSet for?
StatefulSets support ordered, sticky identity.
Why use private container registry?
Private registries protect proprietary artifacts.
What does imagePullPolicy IfNotPresent do?
It reduces unnecessary image pulls.
What is kube namespace useful for?
Namespaces separate teams/environments.