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DevOps - Interview Questions
What are the prerequisites for the DevOps implementation?
Following are some useful prerequisites for DevOps implementation :
Proper communication between the team members.
At least one version control software.
Recently Updated Interview Questions in DevOps
What are the advantages of Docker over virtual machines?
Below are the differences in multiple criteria that show why Docker has advantages over virtual machines.
Memory Space :
In terms of memory, Docker occupies lesser space than a virtual machine.
Boot-up Time :
Docker has a shorter boot-up time than a virtual machine.
Docker containers show better performance as they are hosted in a single Docker engine, whereas, performance is unstable if multiple virtual machines are run.
Docker is easy to scale up compared to virtual machines.
The efficiency of docker is higher, which is an advantage over virtual machines.
Docker doesn’t have the same cross-platform compatibility issues with porting as virtual machines do.
Space Allocation :
Data volumes can be shared and used repeatedly across multiple containers in Docker, unlike virtual machines that cannot share data volumes.
Explain the different Selenium components.
Following are the different components of Selenium :
Selenium Integrated Development Environment (IDE) :
The Selenium IDE consists of a simple framework and comes with a Firefox plug-in that can be easily installed. This Selenium component should be used for prototyping.
Selenium Remote Control (RC) :
It is a testing framework for developers and QA that supports coding in any programming language like Java, PHP, C#, Perl, etc. This helps automate the UI testing process of web applications against any HTTP website.
Selenium WebDriver :
Selenium Grid :
This proxy server works with Selenium RC and with the help of browsers, it is able to run parallel tests on different nodes or machines.
What is kubectl?
By definition, kubectl is a command-line interface for running commands against Kubernetes clusters. Here, ‘ctl’ stands for ‘control’. This ‘kubectl’ command-line interface can be used to deploy applications, inspect and manage cluster resources, and view logs.
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