Blackrock Devops Engineer Interview Questions and Answers

Q1. What is Persistent volume
Ans. 
Persistent volume is a storage volume that exists beyond the life cycle of a container.
• Persistent volumes are used to store data that needs to persist even if the container is deleted or recreated.

• They are decoupled from the container and can be attached to different containers.

• Examples include network-attached storage (NAS), cloud storage, and local storage.

• Persistent volumes are managed by the storage administrator r
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Q2. Volumein kubernetes which can be attached and deattached
Ans. 
PersistentVolumes (PVs) in Kubernetes can be attached and detached.
• PersistentVolumes (PVs) can be attached to pods using PersistentVolumeClaims (PVCs).

• PVs can be detached from pods when no longer needed.

• Examples of PV types include NFS, iSCSI, and AWS EBS.
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Q1. Question on cloud and kubernetes
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Q1. Nothing much just basic hr question
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Q1. AWS services, Terraform commands , Kubernetes concepts, Linux commands
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Q1. AWS Services and their solution architecture
Ans. 
AWS offers a wide range of services for various solution architectures.
• Compute services like EC2, Lambda, and ECS for running applications

• Storage services like S3, EBS, and Glacier for storing data

• Database services like RDS, DynamoDB, and Redshift for managing databases

• Networking services like VPC, Route 53, and CloudFront for connecting resources

• Monitoring services like CloudWatch and CloudTrail for tracking performan...read more
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System Design questions

Q1. This was more on azure devops, Terraform, powershell and azure
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Q1. Technical round with manger. Most of the questions were scenario based
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Q1. How many clusters are there in your project?
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Q2. What are the objects in kubernetes service?
Ans. 
Objects in Kubernetes service include pods, services, endpoints, and namespaces.
• Pods: Basic unit of deployment in Kubernetes, consisting of one or more containers.

• Services: Abstraction that defines a logical set of pods and a policy by which to access them.

• Endpoints: Dynamically updated list of IP addresses and ports for pods backing a service.

• Namespaces: Virtual clusters within a Kubernetes cluster, used to divide clu
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Q1. How can we connection between 2 EC2 instance
Ans. 
You can connect between 2 EC2 instances by using their private IP addresses or public DNS names.
• Use private IP addresses for communication within the same VPC

• Use public DNS names for communication across different VPCs or over the internet
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Q2. How do you connections between public subnet and private subnet.
Ans. 
Connections between public and private subnets are established using a NAT gateway or a NAT instance.
• Use a NAT gateway to allow instances in a private subnet to initiate outbound traffic to the internet while preventing inbound traffic from reaching those instances.

• Alternatively, use a NAT instance with a security group that only allows inbound traffic from instances in the public subnet.

• Ensure that the route tables fo...read more
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Q1. Preferred location, shifts, salary
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Q2. Experience in devops
Ans. 
I have 5 years of experience in DevOps, working with various tools and technologies.
• Experience in setting up and managing CI/CD pipelines using tools like Jenkins and GitLab

• Proficient in containerization using Docker and orchestration with Kubernetes

• Strong knowledge of infrastructure automation using tools like Ansible and Terraform

• Experience in monitoring and logging using tools like Prometheus and ELK stack

• Familiarit...read more
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Q1. Questions on Coding skills
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Q1. More in depth questions on real time implementations
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Q1. Previous experience and salary discussion
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