Robosoft Technologies Cloud Engineer Interview: Rounds, Questions and Preparation

What the job involves

Cloud Engineers in Indian IT services firms design, deploy, and manage cloud infrastructure on platforms like AWS, Azure, or GCP for client projects. Day to day they automate provisioning with scripts, monitor cost and security, and support application teams in moving workloads to the cloud. Freshers often start with certifications and shadow senior engineers on migration or managed services work.

Role and Technical Knowledge

1. 1

   What is the difference between a public, private, and hybrid cloud?

   Define each clearly and give one Indian IT services example, such as a bank using a private cloud for core banking and public cloud for customer apps.

2. 2

   Explain the shared responsibility model in AWS or Azure.

   State that the provider secures the cloud infrastructure while the customer secures what they put in the cloud, like data, access, and OS patches.

3. 3

   What are the key components of a VPC in AWS?

   Mention subnets, route tables, internet gateway, NAT gateway, and security groups, and explain how they enable isolated networking.

4. 4

   How does IAM work in AWS, and why is least privilege important?

   Cover users, groups, roles, policies, and the principle of granting only needed permissions to reduce security risk.

Practical Scenarios

1. 5

   A client's EC2 instance is unreachable via SSH. How would you troubleshoot?

   Check security group rules, network ACLs, route tables, instance status, and SSH key pair; describe a step-by-step approach.

2. 6

   You need to reduce cloud costs for a small project. What steps would you take?

   Suggest right-sizing instances, using reserved or spot instances, deleting unused resources, and setting up billing alerts.

3. 7

   How would you automate the deployment of a web server on AWS?

   Outline using an EC2 user data script or Terraform to launch an instance with a web server installed, and mention version control.

4. 8

   A client wants to move an on-premise application to the cloud. What factors do you consider?

   Discuss lift-and-shift vs re-architecture, data transfer, latency, compliance, and cost, and propose a phased migration.

Behavioural and HR

1. 9

   Why do you want to work as a Cloud Engineer in an IT services company?

   Show interest in cloud technologies, client-facing projects, and learning across industries, not just a generic love for computers.

2. 10

   Describe a time you learned a new technology quickly for a college project.

   Use the STAR method: situation, task, action, result, and highlight self-learning and outcome.

3. 11

   How would you handle a situation where a client is unhappy with a cloud migration delay?

   Emphasize clear communication, root cause analysis, and a revised plan with frequent updates, showing ownership.

4. 12

   Are you comfortable working in rotational shifts or being on call?

   Answer honestly and positively, linking it to the 24/7 nature of cloud operations and client support.

Cloud Services and Best Practices

1. 13

   What is the difference between vertical and horizontal scaling?

   Vertical means adding more power to one machine, horizontal means adding more machines; give a cloud example like resizing an instance vs auto scaling group.

2. 14

   Explain what a load balancer does and when you would use one.

   Describe distributing traffic across multiple servers for high availability and fault tolerance, and mention AWS ELB or Azure Load Balancer.

3. 15

   What is Infrastructure as Code, and why is it useful?

   Define it as managing infrastructure through code, and highlight repeatability, version control, and reduced manual errors.

4. 16

   How do you secure data at rest and in transit in the cloud?

   Mention encryption using KMS or managed keys for data at rest and TLS/SSL for data in transit, plus access controls.