Top 100 DevOps Interview Questions & Answers

Hello Everyone,

One successfully completing DevOps training in Chennai at Credo Systemz you can easily apply for the DevOps job opportunities shared to you directly.

Here I have listed down the Top 100 DevOps Interview Questions & Answers to crack the interview easily.

What Are The Advantages Of DevOps?

 Technical benefits:

Continuous software delivery

Less complex problems to fix

Faster resolution of problems

Business benefits:

Faster delivery of features

More stable operating environments

More time available to add value (rather than fix/maintain)

Differentiate between Asset Management and Configuration Management

Asset Management, broadly defined, refers to any system that monitors and maintains things of value to an entity or group.

Configuration Management is the process of planning for, identifying, controlling and verifying the Configurations Items (CIs) within a service, recording their status and, in support of Change Management, assessing the potential IT impact of changing those items.

What is Puppet?

It is a Configuration Management tool which is used to automate administration tasks

Name the popular scripting language of DevOps?

Python is the popular and most used script language for DevOps.

Describe two-factor authentication?

Two-factor authentication is a security process in which the user provides two means of identification from separate categories of credentials; one is typically a physical token, such as a card, and the other is typically something memorized, such as a security code.

What’s a PTR in DNS?

Pointer records are used to map a network interface (IP) to a hostname. These are primarily used for reverse DNS. Reverse DNS is set up very similar to how normal (forward) DNS is set up.  When you delegate the DNS forward, the owner of the domain tells the registrar to let your domain use specific name servers.

What are the containers?

Containers are a form of lightweight virtualization, heavier than ‘chroot’ but lighter than ‘hypervisors’. They provide isolation among processes while using the same kernel as the host machine, and ‘cgroups’ functionality within a kernel.

In Git how do you revert a commit that has already been pushed and made public?

It can be done in two ways:

By removing or fixing the bad file in a new commit and pushing it to the remote repository. Once the necessary changes to the file have been made, commit it to the remote repository. Use: git commit -m “commit message”

By creating a new commit that undoes all changes that were made in the bad commit. To do this, use command: git revert <name of bad commit>

Why we need DevOps?

Companies are now facing the need for delivering more and faster and better applications to meet the ever more pressing demands of conscious users to reduce the ” Time To Market “. DevOps often helps deployment to happen very fast.

What is agile development and Scrum?

Agile development used as an alternative to Waterfall development practice. In Agile, the development process is more iterative and incremental; there are more testing and feedback at every stage of development as opposed to only the last stage in Waterfall.

Scrum is used to manage complex software and product development, using iterative and incremental practices. Scrum has three roles ie product owner, scrum master, and team.


Check here the remaining Top 100 DevOps Interview Questions and Answers

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Upcoming New Batches for Trending Technologies – Enroll Now!!

Hello Every one,

Credo Systemz providing many certification courses in latest trending technologies, Here is the update about the upcoming certification courses which will be useful for you to learn the latest technologies and get your certification easily. 

The details are given below,

Amazon Web Service Training:

New batch for Amazon Web Services Training starting on 1’st SEP..!


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RPA UiPath Training :


We are passionate about automation and have been rated as the best RPA training institute in India. Come train with us, by the best instructors in the industry.

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Data Science Training:

Data Science batch

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Python Training:

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1.4 lakh Unfilled Big Data Jobs in India..!

In India, around 1.4 lakh jobs in AI and Big Data are still unfilled. The country has a demand for 5.1 lakh employees working in emerging technologies.

According to a report published by Nasscom, 

Out of total 5.1 lakh employees, 3.7 lakh jobs are filled by now. By 2021, the employee deficit would increase to 2.3 lakh while the total demand will go up to around 8 lakh.

AI is penetrating across all sectors including healthcare, advertising, transportation, finance, legal, hospitality, and education. While people are still apprehensive about job loss and displacement, you need to be aware that AI has the power to solve the greatest problems that exist today. The same technology is creating jobs for techies with advanced skills.


Companies including Tech Mahindra, Wipro, Cyient, Genpact and WNS, CGI, Dev-IT and Kellton, Purple talk have joined The Future Skills program. These companies will invest their resources in re-skilling the existing workforce. While countries around the world are preparing for this revolution, India has also started navigating the early stages of this transformation.

Credo Systemz’s latest technology training program includes all the current IT trends such as Hadoop, AWS, RPA, Blue Prism, PMP, Automation Testing, Oracle Primavera, Angular 6 and Data Science Certification Program. Select any one from the above list to get good career growth.

You can also attend a free consulting session with our experienced consultants:

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All the best for Your Bright Future..!

Happiest Minds Technologies Hiring AWS support Engineer – Apply Now

Happiest Minds Technologies Hiring AWS support Engineer – Apply Now

Job description

Candidate should have sound knowledge on Linux Knowledge on AWS and storage is added advantage Candidate should have production support exposure 6+ years’ experience is required and should be ready to work in shifts (24/7)

Candidate should have sound knowledge on Linux Candidate should have production support exposure

Responsible for monitoring the production instances for potential performance/uptime issues and initiate corrective action to prevent performance issues and unplanned downtime Remediate all support issues by conducting the Root cause analysis and establish a process to fix the gaps.

Demonstrate aptitude towards root cause analysis, problem identification and resolution of day-to-day issues. Co-ordinate with various support groups / vendors for any unresolved issues and tool specific issues or hot fixes/patches.

Constantly monitor and report on progress of the project to all stakeholders Flexible enough to look for solutions that may be ‘out of the box’ and contribute towards resolution of an issue Data Center Provisioning Services: New Server Provisioning, Rebuild / Upgrade of OS on existing Servers, Add/Delete/Query Connection, Network Hardware Installation, Move & Decommission, Storage Device installation, Move & Decommission, Carrier Circuit Provisioning, Server Moves and Migration, Inventory management & Managing Equipment room / cabling. Requirements Must have sound knowledge of Windows & basic knowledge of Unix Basic understanding of networking, storage, compute and voice/multi-media technologies Good knowledge in VMware Should have good written and verbal communication. Team player who is ready to take on issues and problems and manage them single handily if need be Understanding of ITIL Practices Linux based IT Infrastructure support (Linux/Middleware/Database) Proficient with Linux administration/ Installation/ configuration/ troubleshooting /maintenance of Linux system Configuration/Installation/ maintenance of Middleware (web servers) – Apache, Tomcat, Weblogic, Jboss with ability to deploy, support, and diagnose real issues Configuration/Installation/ Maintenance of Database (Oracle, SQL, Mysql) with ability to deploy, support, and diagnose real issues

Hands on experience in creating and deploying complex cloud infrastructure solutions in small and large environments. Extensive Experience on automation frameworks like Chef/Puppet/Ansible. Extensive Experience with cloud services (Amazon AWS is must, OpenStack, Docker, Kubernetes) Familiarity with AWS networking and security

Good exposure with monitoring tools geared towards user experience and deep diagnostics Understanding of automation practices throughout the development, build, and deployment phases of the application life -cycle Expert Linux scripting and system management

MySQL, Cassandra, MongoDB, or other database expertise Familiarity with Azure is added advantage


Information Technology and Services, Computer Software, and Computer & Network Security

Employment type – Full-time

Experience – Entry level

Job function

Apply Now

Important AWS Interview Questions and Answers

Amazon Hiring Support Engineer -Apply Now

Amazon Hiring Support Engineer -Apply Now

•Provide support of our incoming tickets, including extensive troubleshooting tasks, with responsibilities covering multiple product lines.
•Work on operations and maintenance driven coding projects, primarily in Python or shell scripts, web technologies, with the potential for Java based projects.
•Software deployment support in staging and production environments.
•Develop tools to aid operations and maintenance.
•System and Support status reporting.
•Ownership of one or more Digital products or components.
•Customer notification and workflow co-ordination and follow-up to maintain service level agreements.
•Work with support team for handing-off or taking over active support issues and to create a team specific knowledge base and skill set.

Basic Qualification:

•B.S. in Computer Science, Engineering or a related technical field
•5+ years overall development/technical support experience
•Experience in any scripting language
•Knowledge of the UNIX/Linux operating system
•Knowledge of Python,Java based technologies

Preferred Qualification:

•Proven ability to troubleshoot and identify the root cause of issues.
•Demonstrated skill and passion for operational excellence.
•Experience in a 24/7 production environment is a plus.
•Ability to retain composure under stressful conditions, communicate effectively with a wide array of individuals at Amazon, and get the right things done.
•Prior experience with UNIX system administration is a plus.
•Understanding of XML/SOAP, web services, workflow modeling, web application development, and industry-standard commerce systems.
•Experience in common web technologies: HTML, JavaScript, AJAX
•Experience with Amazon Web Services

Apply Now

Latest Job & Interview Questions

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Amazon Hiring Quality Assurance Engineer – Intern

Amazon Hiring Quality Assurance Engineer – Intern

Job ID 694461

Job Description

– Experience developing software in a high-performance across different platforms
– Prior knowledge on HTML or other file-formats would be a bonus
– Prior knowledge on machine learning techniques on content analysis will be a plus
– Can multi-task, quickly adapt to new development environments, learn new systems, create reliable/maintainable code, and find creative and scalable solutions to difficult problems
– Knowledge of professional software engineering practices & best practices for the full software development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations
– Ability to take a project from scoping requirements through launch
– Experience in communicating with users, other technical teams, and management to collect requirements, describe software product features, and technical designs.

Basic Qualifications

– BE/BTech/ME/MTech/MS in computer science or with relevant experience as per the job description.
– Strong Datastructure, Algorithm and Problem-solving skills.
– Experience in seeing through a complete software life cycle and showing ownership on building components in them.

Preferred Qualifications

– BE/BTech/ME/MTech/MS in computer science or with relevant experience as per the job description.
– Strong Data structure, Algorithm and Problem solving skills.
– Experience in seeing through a complete software life cycle and showing ownership on building components in them.

Apply Now

Crack the Interview easily with these Important Interview Tips