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Tuesday, June 25, 2019

10 Top DevOps Interview Questions and Answers {Updated}

DevOps Interview Questions and Answers for experienced PDF, Read commonly asked DevOps Job Interview Questions with Answers PDF for Freshers.


Read DevOps Interview Questions and Answers

What is DevOps?
It is a newly emerging term in the IT field, which is nothing but a practice that emphasizes the collaboration and communication of both software developers and other information technology (IT) professionals. It focuses on delivering software product faster and lowering the failure rate of releases.

What are the key aspects or principle behind DevOps?
The key aspects or principle behind DevOps is
  • Infrastructure as code
  • Continuous deployment
  • Automation
  • Monitoring
  • Security

What are the core operations of DevOps with application development and with infrastructure?
The core operations of DevOps with
Application development
  • Code building
  • Code coverage
  • Unit testing
  • Packaging
  • Deployment
With infrastructure
  • Provisioning
  • Configuration
  • Orchestration
  • Deployment

How “Infrastructure of code” is processed or executed in AWS?
In AWS,
  • The code for infrastructure will be in simple JSON format
  • This JSON code will be organized into files called templates
  • This templates can be deployed on AWS and then managed as stacks
  • Later the CloudFormation service will do the Creating, deleting, updating, etc. operation in the stack

Which scripting language is most important for a DevOps engineer?
A simpler scripting language will be better for a DevOps engineer. Python seems to be very popular.

How DevOps is helpful to developers?
DevOps can be helpful to developers to fix the bug and implement new features quickly.  It also helps for clearer communication between the team members.

List out some popular tools for DevOps?
Some of the popular tools for DevOps are
  • Jenkins
  • Nagios
  • Monit
  • ELK (Elasticsearch, Logstash, Kibana)
  • io
  • Jenkins
  • Docker
  • Ansible
  • Git
  • Collectd/Collectl

Mention at what instance have you used the SSH?
I have used SSH to log into a remote machine and work on the command line.  Besides this, I have also used it to tunnel into the system in order to facilitate secure encrypted communications between two untrusted hosts over an insecure network.

How would you handle revision (version) control?
My approach to handling revision control would be to post the code on SourceForge or GitHub so everyone can view it.  Also, I will post the checklist from the last revision to make sure that any unsolved issues are resolved.

What are the types of Http requests?
The types of Http requests are
  • GET
  • HEAD
  • PUT
  • POST
  • PATCH
  • DELETE
  • TRACE
  • CONNECT
  • OPTIONS

What would you check If a Linux-build-server suddenly starts getting slow?
If a Linux-build-server suddenly starts getting slow, you will check for the following three things
Application Level troubleshooting: RAM related issues, Disk I/O read-write issues, Disk Space related Issues, etc.
System Level troubleshooting: Check for Application log file OR application server log file, system performance issues, Web Server Log – check HTTP, tomcat log, etc. or check JBoss, WebLogic logs to see if the application server response/receive time is the issues for slowness, Memory Leak of any application
Dependent Services troubleshooting: Antivirus related issues, Firewall related issues, Network issues, SMTP server response time issues, etc.

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