Datamatics Global Services Devops Engineer Interview Questions and Answers

Q1. What is components of vpc
Ans. 
Components of VPC include subnets, route tables, internet gateways, security groups, network access control lists, and VPN connections.
• Subnets

• Route tables

• Internet gateways

• Security groups

• Network access control lists

• VPN connections
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Q2. Explain Jenkins pipeline
Ans. 
Jenkins pipeline is a set of automated steps to build, test, and deploy code.
• Jenkins pipeline is defined using a Jenkinsfile, which can be written in either Declarative or Scripted syntax.

• It allows for defining multiple stages, each containing one or more steps to be executed sequentially.

• Pipeline can be triggered manually or automatically based on events like code commits or scheduled builds.

• Pipeline can integrate wit...read more
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Q3. Kubernetes architecture
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Q4. Terraform code for ec2 and vpc
Ans. 
Terraform code for creating EC2 instance and VPC
• Use Terraform resources 'aws_instance' for EC2 and 'aws_vpc' for VPC

• Specify necessary parameters like instance type, AMI, subnet ID, security group ID, etc.

• Use Terraform modules for better organization and reusability

• Leverage Terraform state file to track infrastructure changes
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Q1. Asked multiple questions on all Devops tools, but the interviewer was junior and rejected even I answered clearly.
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Q2. Devops tools basics
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You should be a good math solver

Mostly question were based on data structure and algorithm and Kadane's Algorithm . Leet code is the best platform for cracking any coding interview . The logic were similar for every question from the leet code only they changes the name

Q1. 1. Question based on your prefer programming language 2.Question on your Coding round , how you solved this program , what its time complexity 3.Question based on DSA.
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Q2. What is tuple? What is recursion? Time Complexity of a coding question which comes on your coding round There were some more practical question there based on java .
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Q1. Be Confident , talk properly ask him question in the last
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Q1. What is vault & how it is integrated with your AWS
Ans. 
Vault is a tool for managing secrets and protecting sensitive data.
• Vault securely stores and manages sensitive information such as API keys, passwords, and certificates.

• It provides a centralized place for managing access control and encryption of data.

• Vault can be integrated with AWS to securely store and retrieve AWS credentials and other sensitive information.

• Integration with AWS allows for automated provisioning and...read more
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DSA questions leetcode easy level

Q1. Why we Hire you?
Ans. 
I have a strong background in DevOps tools and practices, with a proven track record of successfully implementing automation and improving efficiency.
• Extensive experience with CI/CD pipelines, configuration management, and infrastructure as code

• Strong knowledge of cloud platforms such as AWS, Azure, and GCP

• Ability to collaborate effectively with cross-functional teams to drive continuous improvement

• Proven ability to tr...read more
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Q2. What's your expectations
Ans. 
I expect a challenging role with opportunities for growth and learning in a collaborative team environment.
• Opportunities for professional development

• Collaborative team environment

• Challenging projects

• Clear communication and expectations
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Round duration - 30 minutes
Round difficulty - Medium

Q1. How do you approach solving and troubleshooting infrastructure issues?
Ans. 
I approach solving and troubleshooting infrastructure issues by following a systematic approach and utilizing various tools and techniques.
• Identify the root cause of the issue by analyzing logs, monitoring metrics, and conducting tests.

• Utilize automation tools like Ansible, Puppet, or Chef to quickly deploy and configure infrastructure.

• Collaborate with team members and stakeholders to gather information and brainstorm ...read more
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Q2. 
Guess The Hidden Number Problem Statement
You are given an integer N and there is a hidden number within the range [0, N] that you must guess. You have access to a function higherLower(k) which helps in g...read more
Ans. 
The task is to guess a hidden number within a given range using a function that provides hints about the number's relation to a given input.
• Use the higherLower(k) function to determine if the hidden number is smaller, equal to, or greater than the input k.

• Implement a binary search algorithm to efficiently guess the hidden number within the given range.

• Iteratively narrow down the range based on the hints provided by the...read more
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Round duration - 60 minutes
Round difficulty - Hard

For an experienced Professional I think is not required to have aptitude test.

Q1. Interview is quite difficult, but I managed to crack the first round.
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Q1. It is quite difficult and the focused more on the on going project and more deep drive into technical concepts.
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