Hexaware Technologies AWS Devops Engineer Interview Questions, Process, and Tips

Q1. What is docker File ? Explain
Ans. 
Dockerfile is a text document that contains all the commands a user could call on the command line to assemble an image.
• Dockerfile is used to build Docker images by specifying a series of instructions.

• It includes commands like FROM, RUN, COPY, CMD, etc.

• Each instruction in the Dockerfile creates a layer in the image.

• Dockerfile is used to automate the process of creating Docker containers.

• Example: FROM ubuntu:latest, RUN
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Q2. What is webhook & why??
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Webhook is a method of augmenting or altering the behavior of a web page, or web application, with custom callbacks.
• Webhook is a way for an application to provide other applications with real-time information.

• It allows developers to receive instant notifications when a specific event occurs.

• Webhooks are commonly used in automation, continuous integration, and deployment processes.

• Examples include receiving notification...read more
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Q1. If i delete an instance on the console and then i deploy the same instance terraform template how will terraform behave?
Ans. 
Terraform will recreate the instance as per the template
• Terraform will detect that the instance is missing and recreate it based on the template

• The new instance will have the same configuration as defined in the template

• Any changes made to the instance outside of Terraform will be lost
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Q2. If i have an instance configuration terraform template, and i manually add an ebs to it through console and then give terraform apply how will terraform behave?
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Q3. What will be the IP range if i need 500 IPs?
Ans. 
The IP range for 500 IPs would typically be a /23 subnet.
• For 500 IPs, you would need at least a /23 subnet.

• A /23 subnet provides 512 IP addresses (2^9 = 512), with 510 usable IPs after subtracting network and broadcast addresses.

• The IP range for a /23 subnet would be from x.x.x.0 to x.x.x.255.
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Q4. Python coding on string manipulation
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Q5. What are the health checks after creating instances - 2/2? What do they mean?
Ans. 
Health checks after creating instances ensure the instances are functioning properly.
• Instance status checks ensure the instance is reachable and responding to traffic.

• System status checks ensure the underlying hardware is functioning properly.

• Example: If an instance fails the system status check, it may indicate a problem with the underlying host hardware.
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Q6. How to deploy microservices?
Ans. 
Microservices can be deployed using containerization tools like Docker and orchestration tools like Kubernetes.
• Use containerization tools like Docker to package each microservice along with its dependencies into a container image.

• Leverage orchestration tools like Kubernetes to manage and deploy multiple microservices across a cluster of machines.

• Implement continuous integration and continuous deployment (CI/CD) pipelin...read more
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Q7. Write terraform code to launch an ec2 instance in a vpc and attach a role to it
Ans. 
Launch an EC2 instance in a VPC and attach a role using Terraform
• Define a VPC resource in Terraform

• Define a subnet resource within the VPC

• Create a security group for the EC2 instance

• Define an IAM role for the EC2 instance

• Launch an EC2 instance within the subnet and attach the IAM role
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Q1. Day to day activities
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Q2. Why do you learn various technologies?
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Q3. How will it be beneficial for you to learn various technologies because you will be working with limited technologies?
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Q4. Your project workflow, and how do you manage your tasks
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Q1. Questions on Network Part
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How aws vs verulation.

Q1. Nacl vs security group?
Ans. 
Nacl is a stateless firewall while security group is a stateful firewall in AWS.
• NACL operates at the subnet level, while security groups operate at the instance level.

• NACL rules are evaluated in order, while security group rules are evaluated independently.

• NACLs are stateless, meaning you must create rules for both inbound and outbound traffic, while security groups are stateful.

• NACLs are more flexible in terms of allo...read more
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Q2. Aws cloudformation
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Q1. Reason for change
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Q2. Salary discuss how much excellent
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Q1. Couple of AWS questions
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Q2. Only focused on what havent mentioned in the job description on top of it the interviewer is no aware of the concepts unable to understand the answers
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Q1. Question based on AWS services, GitHub, teraform
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