NMD Private Limited Senior Devops Engineer Interview Questions and Answers

ext is the default file system for many Linux distributions, while xfs is known for better performance and scalability.

• ext is the default file system for many Linux distributions

• xfs is known for better performance and scalability

• xfs supports larger file systems and files compared to ext

CentOS/RHEL 6 & 7 differ in kernel version, package management, systemd, and support lifecycle.

• Kernel version: CentOS/RHEL 6 uses kernel version 2.6.x while CentOS/RHEL 7 uses kernel version 3.x.

• Package management: CentOS/RHEL 6 uses yum for package management, while CentOS/RHEL 7 uses yum and dnf.

• Systemd: CentOS/RHEL 6 uses SysV init system, while CentOS/RHEL 7 uses systemd as the init system.

• Support lifecycle: CentOS...read more

CI/CD is a software development practice where code changes are automatically built, tested, and deployed.

• Continuous Integration (CI) involves automatically building and testing code changes frequently.

• Continuous Deployment (CD) involves automatically deploying code changes to production.

• Jenkins is a popular open-source automation server used for CI/CD pipelines.

• Jenkins pipelines are defined using a Jenkinsfile which s...read more

Kubernetes is an open-source container orchestration platform for automating deployment, scaling, and management of containerized applications.

• Kubernetes follows a master-slave architecture with a master node controlling multiple worker nodes.

• Master node components include API server, scheduler, controller manager, and etcd.

• Worker node components include kubelet, kube-proxy, and container runtime (e.g. Docker).

• Kubernet...read more

Automate the process of adding mount points on system restart and store Terraform state file for accessibility by other developers.

• Use a configuration management tool like Ansible to automatically add mount points on system restart.

• Utilize cloud storage services like AWS S3 or Azure Blob Storage to store Terraform state file for easy access by other developers.

• Implement scripts or automation workflows to handle the mou...read more

Store ansible secrets securely and trigger pipeline after another

• Use ansible-vault to encrypt sensitive data like passwords and API keys

• Store encrypted secrets in a separate file or in a secure vault

• Use ansible-playbook to trigger pipelines sequentially or use a CI/CD tool like Jenkins for automation