DevOps Interview Questions and Answers | Orange TechnoMind

Orange TechnoMind 19-Apr-2019
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DevOps Interview Questions and Answers
 
DevOps is an immense demanding Technology.Let us find out the Top DevOps Questions and Answers you should prepare for the year 2019. These sample DevOps interview questions are the ones students get asked to test their mettle.Orange TechnoMind offers Advanced DevOps Interview Questions 2019 that helps you in cracking your interview & acquire dream career as DevOps Engineer.
 
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1.What is DevOps?
DevOps is the combination of development and Operations group as a way to help the project team to stream line their method or optimize their system with appreciate to communication, collaboration, Integration and automation.
 
 
2.What are the various continuous integration tools are available within the market?
  • Jenkins
  • Cruise Control
  • Bamboo
  • Travis
  • Team City
 
3.Which scripting languages do you observed are most crucial for a DevOps engineer?
As some distance as scripting languages go, the less complicated the better. In reality, the language itself isn’t as vital as information design patterns and development paradigms including procedural, object-orientated, or functional programming.
 
 
4.Describe two-factor authentication?
Two-factor authentication is a protection procedure wherein the user offers approach of identification from separate categories of credentials; one is generally a physical token, inclusive of a card, and the other is usually something memorized, together with a security code.
 
 
5.What are the benefits of NoSQL database over RDBMS?
The advantages are:
  • Less need for ETL
  • Support for unstructured text
  • Ability to handle change over  time
  • Breadth of functionality
  • Ability to scale horizontally
  • Support for multiple  data structures
  • Choice of vendors
 
6.Explain the DevOps Toolchain
Here is the DevOps toolchain-
  • Code
  • Build
  • Test
  • Package
  • Release
  • Configure
  • Monitor
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7.List out a number of the most popular DevOps tools?
  • Git 
  • Jenkins 
  • Puppet
  • Raygun 
  • Docker
 
8.What is Continuous integration?
Continuous integration is a key element of DevOps, as it refers to the process of continually merging the source code of all developers in a team, which enables the detecting and fixing of any mismatches and errors at an early stage. This encourages alignment before continuing with writing new code, which ultimately leads to a speedier, more responsive process.
 
 
9.What is Ver?ion Control?
A version control system allows you to track the records of a group of files and consists of the capability to revert the collection of files to any other version. every version captures a image of the file system at a certain factor in time. the collection of files is usually source code for a programming language but a normal version control system can put any kind of file under version control.the collection of files and their whole records are stored in a repository.
 
 
10.How does HTTP work?
The HTTP protocol works in a client and server model like maximum other protocols. a web browser the usage of which a request is initiated is known as as a client and a web server software which responds to that request is known as a server. world wide net Consortium and the internet Engineering venture force are essential spokes in the standardization of the HTTP protocol. HTTP allows improvement of its request and response with the help of intermediates, as an example a gateway, a proxy, or a tunnel. The sources that may be requested the usage of the HTTP protocol, are made available the use of a sure sort of URI (Uniform resource Identifier) known as a URL (Uniform resource Locator). TCP (Transmission control Protocol) is used to set up a connection to the utility layer port 80 used by HTTP.
 
 
11.What is the primary objective of DevOps?
The primary objective of DevOps is to get the changes into production as quickly as possible while minimizing risks in software quality assurance and compliance.
 
 
12.What is CI in DevOps?
Continuous Integration (CI) in DevOps targets at collecting work from individual developers and put it into a central repository infrequent intervals as early as possible.This facilitates to detect integration bugs from the early stage of product development.
 
 
13.What is CD in DevOps?
DevOps continuous delivery (CD) guarantees the building, testing, and releasing of bug-free software into manufacturing line infrequent intervals by means of an automation device. This system verifies that the development group automates testing and deployment techniques as well for making sure that the code is always in deployable form.
 
 
14.Can one consider DevOps as an Agile methodology?
DevOps may be considered complementary to the agile technique, but now not completely similar.
 
 
15.Which is the popular scripting language in DevOps?
Python
 
 
16.Describe two-factor authentication?
Two-factor authentication is a security process in which the user gives approach of identification from separate categories of credentials; one is commonly a physical token, such as a card, and the alternative is usually something memorized, inclusive of a security code
 
 
17.What are the advantages of NoSQL database over RDBMS?
The advantages are:
  • Less need for ETL
  • Support for unstructured text
  • Ability to handle change over  time
  • Breadth of functionality
  • Ability to scale horizontally
  • Support for multiple  data structures
  • Choice of vendors
 
18.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 
 
19.What are the anti-patterns of DevOps?
A pattern is common utilization generally followed. If a pattern typically followed by others does not work to your enterprise and you continue to blindly observe it, you're basically adopting an anti-pattern.
 
 
20.Point out what are the important thing components or principle behind DevOps?
The key aspects or principle behind DevOps is
  • Infrastructure as code
  • Continuous deployment
  • Automation
  • Monitoring
  • Security
 
21.What are the basic 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
 
22.Provide an explanation for how DevOps is helpful to developers?
DevOps can be helpful to developers to fix the bug and enforce new features quickly. It moreover allows for clearer conversation among the team participants.
 
 
23.Point out at what instance have you used the SSH?
I have used SSH to log right into a far off machine and work on the command line. Beside this, i have extensively utilized it to tunnel into the system a good way to facilitate secure encrypted communications among untrusted hosts over an insecure network.
 
 
24.Mention what are the sorts of Http requests?
The sorts of Http requests are
  • GET
  • HEAD
  • PUT
  • POST
  • PATCH
  • DELETE
  • TRACE
  • CONNECT
  • OPTIONS
 
25.What is the difference among Raid 0 and Raid 1?
RAID 1 gives redundancy via mirroring, i.e., statistics is written identically to two drives. RAID 0 gives no redundancy and as an alternative makes use of striping, i.e., facts is split across all of the drives. this means RAID 0 gives no fault tolerance; if any of the constituent drives fails, the RAID unit fails.
 
 
26.Explain a few prerequisites which might be useful for DevOps implementation?
  • Commitment at the senior level in the organization.
  • Need for alternate to be communicated throughout the organisation.
  • Version control software.
  • Automated tools for compliance to process.
  • Automated Testing
  • Automated Deployment
 
27.Explain the typical roles involved in DevOps.
DevOps Architect – The person who is responsible for the entire DevOps process.
DevOps Engineer – The person need to be experienced with Agile, SCM or version control, continuous integration and continuous delivery process and putting in automation tools for the same, Infrastructure automation and Database management abilties. Any developer who has capabilities in coding or scripting and has the acumen to get into deployment or system admin can qualify for the role of a DevOps engineer.
 
 
28.What is Amazon Web Services in DevOps?
AWS presents services that assist you practice DevOps at your organisation and which can be built first for use with AWS. these tools automate manual tasks, help teams manipulate complex environments at scale, and keep engineers in control of the excessive speed that is enabled by way of DevOps.
 
 
29.What is Extreme Programming (XP)?
Extreme Programming typically called XP is one of the maximum famous agile methodologies, which executes software development. XP rules are designed to focus extra on customer satisfaction. It empowers developers to respond confidently to requirement modifications through smaller iterations. XP emphasizes teamwork as managers, customers and developers work as equal companions in a collaborative team.
 
 
30.What are the types of Version Control Systems?
 
There are two types of Version Control Systems:
  1. Centralized Version Control System
  2. Distributed Version Control System
 
31.What do you know about Git?
Git is a distributed version control system, it plays an crucial role in accomplishing DevOps. Git is a free software, dispensed underneath the terms of GNU general Public License V2.0.
 
 
32.How do you create a brand new repository in git?
Create a project directory and run “git init” below that directory. It creates .git directory inside the project directory.
 
 
33.Name a few branching strategies used in DevOps?
A few branching strategies to be used are-
  • Feature Branching
  • Task Branching
  • Release Branching
 
34.What is Puppet?
It is a Configuration control tool which is used to automate administration responsibilities.
 
 

 

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