Cognizant Devops Interview Questions and Answers

Q1. What is Kubernettes ?
Ans. 
Kubernetes is an open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications.
• Kubernetes is used to manage and automate the deployment of containerized applications.

• It provides features like automatic scaling, load balancing, and self-healing.

• Kubernetes allows for easy management of containers across multiple hosts and clusters.

• It provides declarative...read more
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Q2. What is a container and why is the use?
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A container is a lightweight, standalone executable package that contains everything needed to run an application.
• Containers provide a consistent and reproducible environment for applications to run in.

• They are isolated from the host system and other containers, providing security and portability.

• Containers can be easily deployed and scaled, making them ideal for modern application development and deployment.

• Examples o...read more
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Q3. Containers allow process to run in an isolated environment with its own virtual memory, CPU and storage.It differ from virtual machines such that unlike the OS being virtulaized , the folder that are call...read more
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They conducted an aptitude test and it was based on math and English basic and general knowledge

Based on your skill set they gave you assignments and based on the deadline you have to submit

Q1. What is Docker and its advantages . Which is the most secure docker image
Ans. 
Docker is a containerization platform that allows developers to package and deploy applications in a portable manner.
• Advantages include: faster deployment, improved scalability, reduced infrastructure costs, and increased consistency across environments.

• The most secure Docker image is one that is regularly updated with security patches and has minimal dependencies.

• Examples of secure Docker images include those from off...read more
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Q1. Difference between git merge and git rebase
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Git merge combines changes from different branches, while git rebase rewrites commit history by moving the current branch to the tip of another branch.
• Git merge creates a new commit with the combined changes of the branches being merged.

• Git rebase moves the current branch to the tip of another branch, replaying the commits on top of it.

• Merge preserves the commit history of both branches, while rebase creates a linear h...read more
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Q2. Difference between s3 and ebs
Ans. 
S3 is object storage while EBS is block storage in AWS.
• S3 is suitable for storing large amounts of unstructured data like images, videos, and backups.

• EBS is used for storing data that requires frequent updates and access, like databases.

• S3 is scalable and durable, while EBS is persistent and can be attached to a single EC2 instance.

• S3 is accessed over HTTP/HTTPS, while EBS is accessed as a block device within an EC2 in
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Q3. What is the default monitoring time in aws cloud watch
Ans. 
The default monitoring time in AWS CloudWatch is 5 minutes.
• Default monitoring time in AWS CloudWatch is 5 minutes

• Can be changed to 1 minute for detailed monitoring

• Monitoring intervals can be adjusted based on requirements
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Q4. How to solve merge conflicts
Ans. 
Merge conflicts can be solved by resolving the conflicting changes, committing the resolved changes, and then pushing the changes to the repository.
• Pull the latest changes from the remote repository

• Locate the conflicting files and resolve the conflicts manually

• Add the resolved files to the staging area

• Commit the changes with a message explaining how the conflicts were resolved

• Push the changes to the remote repository
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