If you have been given an interview to work for a DevOps team, then you already know that your main focus will be to implement all the changes into the business. So, what do you already know about DevOps? Your answer has to be simple and clear. Start by explaining how the increasing need for DevOps in the IT sector is. IT departments are now operating more like business units instead of departments. This has caused IT budgets to become more volatile, which lead to staff turnover and employee dissatisfaction.
One of the major reasons why many IT departments are changing their operating models is the need for simplified communication and automation tools. However, the new model doesn’t only mean simplifying IT. You also need to discuss the need for a unified infrastructure for application deployment, testing, and integration. In addition, you have to discuss continuous integration or CI as it is also known. There might also be a need for better or different ways of deploying or using applications. To make your explanation clearer, you can use terms like automated application lifecycle or CMMI.
Another thing you have to clarify during your interview is your thoughts on continuous deployment and continuous delivery. Many companies who use DevOps do not like the term “continuous deployment”. According to them, it creates too much complexity for the average business unit. However, if you understand the concept behind continuous deployment then you will be able to properly answer interview questions regarding this topic.
One of the important concepts that you should fully understand during your interview is “continuous monitoring”. In case you did not already know, continuous monitoring is the ability to check a piece of code and see what changes it will make. For example, you have created a special piece of software called “Dockerfile”. When you run a “docker compose” then you can easily check the output of your software in real time.
Some companies might ask you questions regarding continuous integration. If you are not familiar with this term then I suggest that you find someone who knows and then explain what continuous integration is all about. Basically, continuous integration is an approach that integrates your code into various branches of an upstream repository over a period of time. In addition, I would like to point out that continuous integration is often used when you have a large change that needs to be reviewed and merged. For instance, if you are working on a huge change in your project, then you may require a series of commits over several weeks to approve your code change.
Lastly, one of the most common DevOps interview questions is “what is your preferred method of using a version control system (VC)? What about manual incremental/consistent merge or parallel merges? Which technique(s) work best for your team? These and many more questions are what we will discuss in our next article.
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