Cognizant Senior Devops Engineer Interview Questions and Answers

Q1. Describe CI/CD and Jenkins set up
Ans. 
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
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Q2. Define Kebernetes architecture
Ans. 
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
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Q1. Gitlab related Questionnaire ?
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Q2. Terraform related Questionnaire ?
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Q1. Jenkins ci-cd meaning
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Q2. Grep and egrep in linux
Ans. 
grep and egrep are command line tools used for searching text patterns in files in Linux.
• grep is a basic command line tool for searching text patterns in files.

• egrep is an extended version of grep with support for regular expressions.

• grep is case-sensitive by default, use -i flag for case-insensitive search.

• egrep supports extended regular expressions without escaping special characters.

• Example: grep 'pattern' file.txt

• E
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Q3. How to print forth coloumn
Ans. 
Use awk command to print the fourth column of a file
• Use awk command with '{print $4}' to print the fourth column of a file

• Example: awk '{print $4}' file.txt
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Q1. What is the difference between ext and xfs?
Ans. 
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
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Q2. What is the difference between CentOS/RHEL 6 & 7?
Ans. 
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
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