Aaban Solutions Devops Engineer Interview Questions and Answers

Q1. TCP UDP knowlege, OSI
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Array,String,Data Structure, java ,oops

Q1. What is oopsin java?
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OOPs in Java stands for Object-Oriented Programming concepts which include inheritance, encapsulation, polymorphism, and abstraction.
• OOPs concepts help in organizing and structuring code for better reusability and maintainability.

• Inheritance allows a class to inherit properties and behavior from another class.

• Encapsulation hides the internal state of an object and only exposes necessary functionalities.

• Polymorphism all...read more
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Q2. What is link list?
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A linked list is a data structure consisting of a sequence of elements where each element points to the next element in the sequence.
• Consists of nodes where each node contains data and a reference to the next node

• Can be singly linked (each node points to the next node) or doubly linked (each node points to both the next and previous nodes)

• Common operations include insertion, deletion, and traversal

• Example: Singly linke...read more
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Q1. Basic questions regarding AWS, Python and others
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Q2. Few questions on kubernetes
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Q1. About EKS in AWS
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Q2. About ECS in AWS
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Q1. Difference between ENTRYPOINT, CMD, and RUN in docker. Can we use RUN instead of CMD in a Dockerfile? Difference between ARGS and ENV.
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Explaining the differences between ENTRYPOINT, CMD, and RUN in Docker and the usage of ARGS and ENV.
• ENTRYPOINT is the command that runs when the container starts

• CMD is the default command that runs after ENTRYPOINT, can be overridden

• RUN executes commands during the build process

• RUN can be used instead of CMD, but it will not be the default command

• ARGS are used to pass arguments to the Dockerfile during build time

• ENV se...read more
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Q1. Explain the Kubernetes architecture
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Kubernetes architecture is a container orchestration platform that manages containerized applications across a cluster of nodes.
• Kubernetes follows a master-slave architecture with a master node and multiple worker nodes.

• Master node components include API server, scheduler, controller manager, and etcd.

• Worker node components include kubelet, kube-proxy, and container runtime (e.g. Docker).

• Nodes communicate with each oth...read more
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Q2. Write the terraform script
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Writing a terraform script for infrastructure provisioning
• Define provider and required variables

• Create resources like instances, networks, and storage

• Use modules for reusable code

• Implement variables and outputs for flexibility

• Leverage terraform state for tracking changes
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Q1. Write the dockerfile
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A Dockerfile is a text document that contains all the commands a user could call on the command line to assemble an image.
• Start with a base image

• Use the RUN instruction to execute commands

• Use the COPY instruction to add files from your Docker client’s current directory

• Use the CMD instruction to specify the command to run when the container starts
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Q1. What are your salary expectations
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Q1. Write down the code of scripted and declarative pipeline
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Scripted and declarative pipelines in Jenkins for DevOps Engineer role
• Scripted pipeline uses Groovy script syntax

• Declarative pipeline uses a more structured format with predefined stages

• Scripted pipeline example: node { stage('Build') { echo 'Building' } }

• Declarative pipeline example: pipeline { agent any stages { stage('Build') { steps { echo 'Building' } } } }
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Medium DSA questions

Q1. Terraform uses and flow in your company
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Q2. Remote backend in terraform?
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