Crest Data Systems Devops Engineer Interview Questions, Process, and Tips

Q1. What is dockerfile
Ans. 
Dockerfile is a text file that contains instructions to build a Docker image.
• Dockerfile is used to define the environment and dependencies for a Docker container

• It includes commands like FROM, RUN, COPY, and CMD to specify the base image, run commands, copy files, and set the default command

• Dockerfile is used with the 'docker build' command to create a Docker image
Answered by AI
Add your answer
Q2. What is jenkinsfile
Ans. 
Jenkinsfile is a text file that defines the pipeline for a Jenkins job.
• Jenkinsfile is written in Groovy scripting language.

• It allows defining the entire pipeline as code, including build, test, and deployment stages.

• Jenkinsfile can be stored in version control along with the project code for better traceability.

• It enables automation and repeatability of the CI/CD process.

• Example: pipeline { agent any stages { stage('Bu...read more
Answered by AI
Add your answer
Q3. How to reduce size of docker file
Ans. 
To reduce the size of a Docker file, remove unnecessary dependencies, use multi-stage builds, optimize layers, and use smaller base images.
• Remove unnecessary dependencies and files

• Utilize multi-stage builds to reduce the number of layers

• Optimize layers by grouping related commands together

• Use smaller base images like Alpine instead of larger ones like Ubuntu
Answered by AI
Add your answer
Q4. What is orchestration
Ans. 
Orchestration is the automated arrangement, coordination, and management of complex computer systems or services.
• Orchestration involves automating tasks such as provisioning, configuration, deployment, scaling, and monitoring of software applications.

• It helps in streamlining and optimizing the workflow of various components in a system.

• Popular orchestration tools include Kubernetes, Docker Swarm, and Apache Mesos.

• Orche...read more
Answered by AI
Add your answer
Q5. What is azure devops and how to use it
Ans. 
Azure DevOps is a set of development tools provided by Microsoft to help teams plan, build, and deploy software applications.
• Azure DevOps includes services for version control, build automation, release management, and more

• It allows for collaboration between development and operations teams

• Users can create pipelines to automate the build and deployment process

• Azure Boards can be used for project management and tracking
Answered by AI
Add your answer
Q6. What is helm charts
Ans. 
Helm charts are packages of pre-configured Kubernetes resources used for deploying applications.
• Helm charts are used to define, install, and upgrade Kubernetes applications.

• They are written in YAML and can include templates for Kubernetes resources like deployments, services, and ingress.

• Helm charts can be customized using values files to adjust configurations for different environments.

• Helm charts are stored in reposi...read more
Answered by AI
Add your answer

Host webapp container using dockerfile and dockercompose

Q1. Where do you see yourself in next 5 years
Add your answer

Q1. What are the steps to decrease a size of dockerfile
Ans. 
To decrease the size of a Dockerfile, steps such as using multi-stage builds, minimizing layers, and optimizing image size can be taken.
• Use multi-stage builds to reduce the number of layers in the final image

• Minimize the number of RUN commands by combining them into a single command

• Remove unnecessary files and dependencies from the image

• Use smaller base images like Alpine instead of larger ones like Ubuntu

• Optimize the ...read more
Answered by AI
View 1 more answer
Q2. What is init container
Ans. 
Init container is a special type of container in Kubernetes that runs before the main application container starts.
• Init containers are used to perform tasks such as setting up configuration files, initializing a database, or waiting for a service to be ready before the main container starts.

• They run to completion before the main container starts, ensuring that any dependencies are met.

• Init containers share the same net...read more
Answered by AI
Add your answer
Q3. What is role of nodeport type service
Ans. 
NodePort type service exposes a service on a specific port on all nodes in the cluster.
• NodePort type service allows external traffic to access a service in a Kubernetes cluster

• It assigns a static port on each node, which forwards traffic to the service

• It is commonly used for accessing applications externally in a development environment
Answered by AI
Add your answer
Q4. How to configure vpc peering
Ans. 
VPC peering allows connecting two VPCs to communicate with each other using private IP addresses.
• Ensure both VPCs are in the same region

• Update route tables in both VPCs to allow traffic between them

• Ensure there are no overlapping CIDR blocks

• Accept the peering connection request in both VPCs
Answered by AI
Add your answer

Write a Dockerfile to create image for a web app

Q1. How do you see yourself after 5 years
Add your answer

Q1. Details about ssh configs
Add your answer
Q2. Details about aws voc
Add your answer