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  Subscribe YouTube Channel @devops-pathshal a   1. What is Docker ? Ans:- Docker is a platform that allows you to package an application and all its dependencies into lightweight portable containers. 2. What are Containers ? Ans:- Containers are lightweight, isolated environment that package an application along with all dependencies so it run consistently on any system. 3. What is the difference between a container and a Virtual Machine ? Ans:- Containers are lightweight because they share the host operating system, while virtual machine are heavy because they run their own full operating system. Containers start very quickly, use fewer resources and are ideal for microservices. Virtual machines provide stronger isolation but require more RAM and CPU since each VM containers a full OS. So overall, containers are fast and efficient, whereas VMs are heavier but more isolated. 4. What are docker engine ? Ans:- Docker Engine is the core component of  Docker that runs and ma...

  Subscribe YouTube Channel @devops-pathshala                                               Docker Networking  Docker networking is the way Docker containers communicate with each other, with the host system, and with the outside world (like the internet). Since containers are isolated by default, networking allows them to exchange data and services in a controlled and flexible manner. 1. Why Docker Networking is Needed Each container has its own isolated environment, including its own network stack. To allow communication between: Containers on the same host Containers across different hosts Containers and the external world (internet) Networking also allows services to be exposed securely to the outside. 2. Types of Docker Networks Docker provides several built-in network types: Network Type Description Use Case Bridge Default network for ...

                                                                    Docker Image Management  A docker image is a read only blue print used to create containers. It contains the application code, dependencies and environment required to run the containers.                                              Image vs Container  Feature Docker Image Docker Container Definition Read-only template used to create containers  Running instance of a Docker image State Static (does not change) Dynamic (changes during runtime) Purpose Used to build containers Used to run applications Mutability Immutable (cannot be modified) Mutable (can be modified) Storage Stored on disk Runs in memory + disk Creation Creat...

  What is Docker ? Docker is a platform that allows you to package an application and all its dependencies into lightweight, portable containers. Why use Docker ? Docker simplifies application deployment by packaging everything into lightweight portable containers. What is the difference between a container and a VM(Virtual Machine)? Containers are lightweight because they share the host operating system , while Virtual machines are heavy because they run their own full Operating System. Containers start very quickly , use fewer resources and are ideal for microservices . Virtual machines are provide stronger isolation but require more Ram and CPU since each VM containers a full OS. So overall, containers are fast and efficient , whereas VMs are heavier but more isolated. What is Container ? Containers are lightweight, isolated environments that package an application along with all its dependencies so it run consistently on any system. They share the Host OS kernel , so they ar...

  🟢 Basic Kubernetes Interview Questions What is Kubernetes? Why do we use Kubernetes? Difference between Docker and Kubernetes? What is a Pod in Kubernetes? What is a Node in Kubernetes? What is a Namespace? What is a Deployment in Kubernetes? What is a Service in Kubernetes? Types of Services in Kubernetes? What is a Kubelet? What is a Kubernetes Master Node? What are Labels and Selectors? What is ReplicaSet? What is the difference between ReplicaSet and Deployment? What is kubectl? (common commands) What are ConfigMaps? What are Secrets? Difference between Secret and ConfigMap? What is ETCD? What is Scheduler? What is Container Runtime in Kubernetes? 🟡 Intermediate Kubernetes Questions Difference between NodePort, ClusterIP, LoadBalancer? What is Ingress and Ingress Controller? What is Horizontal Pod Autoscaler (HPA)? What are taints and tolerations? What is Node Affinity vs Pod Affinity? What is DaemonSet? What is StatefulSet? Difference between StatefulSet and Deployment? Wh...

  🔹 Linux Networking – Basic to Advanced Questions ✅ Basic Level 1.What is the difference between IP address, Subnet mask, and Gateway? 2.How do you check your system’s IP address in Linux? (commands) 3.Difference between ifconfig and ip addr command. 4.How do you check active network connections in Linux? 5.What is the difference between TCP and UDP? Give examples. 6.How to test connectivity between two systems? (ping, telnet, nc). 7.What is the use of /etc/hosts file in Linux? 8.What is the difference between public IP and private IP? 9.How do you check open ports on a Linux system? ✅ Intermediate Level 10.What is the difference between switch, router, and bridge in networking? 11.What is DNS? How do you check DNS resolution in Linux? 12.Explain the difference between static IP and DHCP. 13.What is ARP? How to check ARP table in Linux? 14.What is the use of /etc/resolv.conf file? 15.How do you trace the path packets take to a destination? 16.What is netstat command? Why is it re...

  1. Basic Level EC2 Interview Questions ये वो सवाल हैं जो किसी भी fresher या beginner से ज़रूर पूछे जाते हैं। 1.What is Amazon EC2? 2.What are the benefits of using EC2? 3.What is the difference between EC2 and a physical server? 4.What are EC2 instance types? Name a few. 5.What is an AMI (Amazon Machine Image)? 6.How do you launch an EC2 instance? 7.What is the difference between On-Demand, Reserved, and Spot Instances? 8.What is the difference between EBS and Instance Store? 9.What is Elastic IP in EC2? 10.What is the default limit of EC2 instances per region? 11.Can we stop and restart a Spot Instance? 12.How to connect to EC2 instance using SSH? 13.What is Key Pair in EC2? 14.What is the difference between public and private IP? 15.What is the difference between rebooting and stopping an EC2 instance? 2. Intermediate Level EC2 Interview Questions ये तब पूछे जाते हैं जब interviewer देखना चाहता है कि आपको practical और configuration का knowledge है। 16.What is the difference betw...