To succeed in your interviews, you must demonstrate proficiency across several core technical domains. Our interviewers will ask you to explain concepts, draw out architectures, and solve realistic operational problems.
Linux Systems & Scripting
A deep understanding of Linux operating systems is the bedrock of this role. You will be evaluated on your ability to install, maintain, secure, and troubleshoot environments running Red Hat Enterprise, Ubuntu, and CentOS.
Be ready to go over:
- System Administration – Managing processes, file permissions, user management, and secure SSH configurations.
- Automation Scripting – Writing robust scripts in Python or Shell to automate backups, parse logs, or trigger alerts.
- Networking & Security – Configuring firewalls, understanding TCP/IP, and troubleshooting DNS or routing issues.
- Advanced concepts (less common) – Kernel tuning, custom bash profiles for fleet management, and deep-dive memory/CPU profiling.
Example questions or scenarios:
- "Walk me through how you would troubleshoot a Linux server that is suddenly experiencing 100% CPU utilization."
- "Write a shell script that finds all files larger than 1GB in a directory and archives them."
- "Explain the boot process of a Linux system from power-on to the user login prompt."
Cloud Architecture & Infrastructure as Code (IaC)
We operate across both on-premise data centers and public clouds. Your ability to design scalable, secure, and cost-effective environments using IaC is heavily scrutinized.
Be ready to go over:
- Terraform & Provisioning – Structuring state files, writing modular Terraform code, and managing multi-environment deployments.
- Cloud Platforms – Core networking, compute, and IAM concepts in AWS and Oracle Cloud Infrastructure (OCI).
- Configuration Management – Using Ansible and Puppet for server configuration and state enforcement.
- Advanced concepts (less common) – Writing custom Ansible modules, managing Terraform state locks in a distributed team, and hybrid-cloud networking (e.g., AWS Direct Connect).
Example questions or scenarios:
- "How do you handle secrets and sensitive data within your Terraform configurations?"
- "Describe a time you used Ansible to provision and configure a fleet of servers from scratch."
- "What strategies would you use to reduce our cloud costs and improve effective resource utilization?"
Containerization & Kubernetes Orchestration
Modern infrastructure relies on containers. You must prove your ability to package applications and manage complex orchestrations.
Be ready to go over:
- Docker Fundamentals – Writing optimized Dockerfiles, managing image layers, and handling container networking.
- Kubernetes Management – Deploying pods, configuring services, managing ingress, and ensuring cluster high availability.
- Automation Integration – Using Docker and Ansible together to automate the creation and scaling of Kubernetes pods.
- Advanced concepts (less common) – Managing stateful applications in K8s, custom Helm charts, and navigating OpenShift specifics.
Example questions or scenarios:
- "A Kubernetes pod is repeatedly crashing with a CrashLoopBackOff error. How do you troubleshoot this?"
- "Explain how you would automate the deployment of a new microservice into an existing Kubernetes cluster."
- "What is your approach to monitoring and alerting for a large-scale Kubernetes environment?"
CI/CD & Build Automation
Delivering software quickly and safely requires robust pipelines. Interviewers will test your experience in building and maintaining deployment workflows.
Be ready to go over:
- Pipeline Design – Designing CI/CD pipelines for multiple software applications across dev, test, and production environments.
- Jenkins Expertise – Configuring Jenkins jobs, writing declarative pipelines, and managing plugins and worker nodes.
- Build Tools – Integrating tools like Apache Maven and Apache Gradle into the automated build process.
- Advanced concepts (less common) – Blue/green deployments, canary releases, and migrating legacy deployments to automated pipelines.
Example questions or scenarios:
- "Walk me through the architecture of a Jenkins pipeline you built from scratch."
- "How do you ensure zero-downtime deployments when releasing a new version of a critical application?"
- "Describe how you would migrate a legacy, manual release process into a fully automated CI/CD pipeline."
Observability & Database Administration
You cannot fix what you cannot see. Furthermore, managing state and data safely is a critical responsibility for our DevOps team.
Be ready to go over:
- Monitoring Systems – Setting up and optimizing Prometheus and Grafana for real-time cluster monitoring.
- Log Aggregation – Deploying and querying logs using the ELK stack (Elasticsearch, Logstash, Kibana) or Splunk.
- Database Operations – Routine administration, backup, and restoration for databases like MySQL, Postgres, MongoDB, and HBase.
- Advanced concepts (less common) – Creating custom Prometheus exporters and managing Elasticsearch cluster shards.
Example questions or scenarios:
- "How do you set up alerting in Prometheus to notify the team before a disk fills up?"
- "Explain your strategy for taking zero-downtime backups of a production Postgres database."
- "What metrics do you consider most critical when building a Grafana dashboard for a web application?"