Kratos Ads Devops Engineer Interview Questions and Answers

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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Q1. How many clusters are there in your project?
Ans. 
Our project utilizes multiple clusters for scalability, redundancy, and efficient resource management.
• We have three main clusters: development, staging, and production.

• The development cluster is used for testing new features and bug fixes.

• The staging cluster mirrors the production environment for final testing.

• The production cluster handles live traffic and user requests.
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Q2. What are the objects in kubernetes service?
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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...read more
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Basic kubernetes related questions

Q1. Git fetch vs git pull
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Git fetch retrieves updates from a remote repository, while git pull fetches and merges them into the current branch.
• git fetch updates the local repository with changes from the remote but does not merge them.

• Example: 'git fetch origin' fetches changes from the 'origin' remote.

• git pull combines 'git fetch' and 'git merge', updating the local branch with remote changes.

• Example: 'git pull origin main' fetches and merges ...read more
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Q2. How hpa works in kubermetes
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Horizontal Pod Autoscaler (HPA) automatically adjusts the number of pods in a deployment based on CPU utilization or other metrics.
• HPA monitors metrics like CPU and memory usage to determine scaling needs.

• It uses the Kubernetes Metrics Server to gather resource usage data.

• For example, if CPU usage exceeds a defined threshold, HPA can increase the number of pods.

• HPA can also scale down pods when resource usage is low, e...read more
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Q3. How to terraforn check resources
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Terraform checks resources using the 'terraform plan' command to preview changes and 'terraform state' for current resource status.
• Use 'terraform plan' to see what changes will be made before applying them.

• Run 'terraform apply' to implement the changes after reviewing the plan.

• Check the current state of resources with 'terraform state list' to view managed resources.

• Use 'terraform show' to display detailed information ...read more
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Q4. Python basic questions
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Q5. Ejati docker expose and publish command
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Docker's EXPOSE and -p options define container ports for communication and mapping to host ports.
• EXPOSE command in Dockerfile specifies which ports the container listens on at runtime.

• Example: EXPOSE 80 exposes port 80 for HTTP traffic.

• -p option in 'docker run' maps a container's port to a host port.

• Example: 'docker run -p 8080:80 myapp' maps host port 8080 to container port 80.

• Using EXPOSE alone does not publish the ...read more
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Basic quant is asked which is easy to crack

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. What are state full and stateless applications?What is the difference between them?
Ans. 
Stateful applications store data while stateless applications do not.
• Stateful applications maintain a record of previous interactions and require persistent storage.

• Stateless applications do not store data and can be easily scaled horizontally.

• Stateful applications are more complex and require more resources than stateless applications.

• Examples of stateful applications include databases and messaging systems, while sta...read more
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Q1. Discussion on expectations and experience
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Q1. What is your Strength?
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