The Interview Loop
Recruiter Screen (30 min)
Standard fit check, behavioral questions, and resume overview.
Technical Loop (3-4 Rounds)
Deep dive into domain knowledge, coding, and system design.
Interview Question Bank
DevOps Engineer
•
Behavioral
•
medium
Describe a time a deployment broke production despite passing all CI checks. How did you troubleshoot and fix the pipeline?
#Incident Management
#Post-mortem
#CI/CD
DevOps Engineer
•
Behavioral
•
medium
One of our clients is complaining about skyrocketing AWS costs. What steps would you take to audit and optimize their cloud expenditure?
#AWS Cost Explorer
#FinOps
#Optimization
DevOps Engineer
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Behavioral
•
medium
Tell me about a time you had to push back on a client or development team because their architectural choice was not scalable or secure.
#Communication
#Stakeholder Management
#Consulting
DevOps Engineer
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Behavioral
•
hard
HCLTech often works with strict SLAs. Describe a high-pressure situation where you had to restore a critical service within a tight SLA.
#Incident Management
#SLA
#Pressure
DevOps Engineer
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Behavioral
•
easy
How do you stay updated with the rapidly changing DevOps landscape, and how have you applied a new tool to solve a legacy problem?
#Continuous Learning
#Innovation
DevOps Engineer
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Coding
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medium
Write a declarative Jenkinsfile to build a Docker image, push it to AWS ECR, and deploy to EKS, including a manual approval stage for the production environment.
#Jenkinsfile
#Docker
#AWS ECR
#EKS
DevOps Engineer
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Coding
•
medium
Write a Kubernetes NetworkPolicy that allows ingress traffic to a backend pod only from a specific frontend namespace.
#Kubernetes
#Network Policies
#Security
DevOps Engineer
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Coding
•
easy
Write an Ansible playbook to install Nginx, ensure it starts on boot, and copy a custom configuration file from a Jinja2 template.
#Ansible
#Playbooks
#Linux
DevOps Engineer
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Coding
•
medium
Write a Python script using Boto3 to find and delete all unattached EBS volumes older than 30 days.
#Python
#Boto3
#AWS
DevOps Engineer
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Coding
•
medium
Write a Bash script to parse an Nginx access log file and find the top 10 IP addresses with the most 404 errors.
#Bash
#Linux
#Log Parsing
DevOps Engineer
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Coding
•
easy
How do you handle exceptions and retries in a Python script that interacts with a flaky third-party API?
#Python
#Error Handling
#API
DevOps Engineer
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Coding
•
hard
Explain how PromQL handles vector matching. Write a query to calculate the 99th percentile of API request latency.
#Prometheus
#PromQL
#Metrics
DevOps Engineer
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System Design
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hard
Explain how you would migrate an existing push-based Jenkins pipeline to a pull-based GitOps model using ArgoCD for a banking client with strict compliance requirements.
#GitOps
#ArgoCD
#Kubernetes
#Compliance
DevOps Engineer
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System Design
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hard
How do you design a highly available Kubernetes cluster for a stateful application requiring persistent storage across multiple availability zones?
#Kubernetes
#High Availability
#StatefulSets
#StorageClasses
DevOps Engineer
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System Design
•
hard
You need to refactor a monolithic Terraform configuration into reusable modules for different HCLTech clients. What is your approach?
#Terraform
#Modularity
#Enterprise Architecture
DevOps Engineer
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System Design
•
hard
Design an AWS architecture for a 3-tier web application that is highly available, fault-tolerant, and auto-scales based on CPU utilization.
#AWS
#Architecture
#Auto Scaling
DevOps Engineer
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System Design
•
hard
How would you design a centralized logging solution for a hybrid cloud environment spanning on-premise servers and AWS?
#ELK
#Splunk
#Hybrid Cloud
#Architecture
DevOps Engineer
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System Design
•
hard
Design a disaster recovery (DR) strategy for a mission-critical database with an RPO of 5 minutes and an RTO of 1 hour.
#Disaster Recovery
#RPO/RTO
#Databases
DevOps Engineer
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Technical
•
medium
How do you handle shared libraries in Jenkins for a multi-tenant enterprise client to ensure reusability and security?
#Jenkins
#Groovy
#Enterprise Architecture
DevOps Engineer
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Technical
•
medium
How do you securely manage secrets in a CI/CD pipeline without exposing them in logs or source code?
#Secret Management
#HashiCorp Vault
#AWS Secrets Manager
#CI/CD
DevOps Engineer
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Technical
•
medium
Explain the difference between a StatefulSet and a Deployment. When would you use one over the other in a client's microservices architecture?
#Kubernetes
#Microservices
DevOps Engineer
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Technical
•
easy
You notice a pod is stuck in the CrashLoopBackOff state. Walk me through your exact troubleshooting steps.
#Kubernetes
#Debugging
DevOps Engineer
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Technical
•
medium
How do you securely pass passwords or API keys to a Bash script running as a cron job?
#Bash
#Cron
#Security
DevOps Engineer
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Technical
•
medium
How do you optimize a Dockerfile for a Java Spring Boot application to minimize image size and build time?
#Docker
#Optimization
#Java
DevOps Engineer
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Technical
•
medium
How do you manage Terraform state files in a team of 20 DevOps engineers working on the same AWS infrastructure?
#Terraform
#State Management
#AWS
DevOps Engineer
•
Technical
•
medium
What happens if someone manually deletes an EC2 instance via the AWS Console that was provisioned by Terraform? How do you reconcile this?
#Terraform
#State Drift
#AWS
DevOps Engineer
•
Technical
•
hard
How do you handle rolling updates across 500 Linux VMs using Ansible without causing downtime?
#Ansible
#Rolling Updates
#High Availability
DevOps Engineer
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Technical
•
medium
An enterprise client wants to restrict cross-account S3 bucket access to only specific IAM roles. How do you configure the bucket policy?
#AWS IAM
#S3
#Security
DevOps Engineer
•
Technical
•
medium
Explain how you would set up Azure DevOps pipelines to deploy a containerized application to Azure Kubernetes Service (AKS).
#Azure DevOps
#AKS
#CI/CD
DevOps Engineer
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Technical
•
medium
How do you implement a Blue/Green deployment strategy using AWS CodeDeploy and Application Load Balancer?
#AWS CodeDeploy
#ALB
#Deployment Strategies
DevOps Engineer
•
Technical
•
easy
Explain the difference between deep copy and shallow copy in Python. Give a use case for each in a DevOps automation context.
#Python
#Data Structures
DevOps Engineer
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Technical
•
hard
A client reports their web application is intermittently slow. CPU and memory metrics look normal. How do you investigate?
#Performance Tuning
#Networking
#Databases
DevOps Engineer
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Technical
•
easy
What is the difference between tracing, logging, and metrics? Name a tool you would use for each.
#Observability
#Tools
DevOps Engineer
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Technical
•
medium
How do you secure an Elasticsearch cluster and ensure data is encrypted in transit and at rest?
#Elasticsearch
#Encryption
#Security
DevOps Engineer
•
Technical
•
medium
How do you integrate vulnerability scanning (e.g., SonarQube, Trivy) into an existing CI/CD pipeline without significantly slowing down developer velocity?
#Security Scanning
#CI/CD
#Optimization
Difficulty Radar
Based on recent AI-sourced data.
Meet Your Interviewers
The "Standard" Interviewer
Senior EngineerFocuses on core competencies, system constraints, and clear communication.
SimulateUnwritten Rules
Think Out Loud
Always explain your thought process before writing code or drawing architecture.