Global tech
Barracuda Networks India Site Reliability Engineer Interview: Rounds, Questions and Preparation
For Site Reliability Engineer roles at companies like Barracuda Networks India
What the job involves
Site Reliability Engineers (SREs) at global tech companies like Barracuda Networks India focus on ensuring that large-scale, distributed systems are reliable, scalable, and efficient. They combine software engineering and systems administration to build automation, monitor performance, and respond to incidents. Day to day, they write code to improve infrastructure, set up observability, and collaborate with development teams to design resilient services.
Role and Technical Knowledge
- 1
What is the difference between a Site Reliability Engineer and a DevOps Engineer?
Highlight that SRE focuses on reliability, SLIs/SLOs, and error budgets, while DevOps is a broader cultural and automation movement. Mention that SRE is a specific implementation of DevOps principles.
- 2
Explain the concept of an error budget and how it influences decision-making.
Define error budget as the acceptable amount of downtime or failure. Explain how it balances innovation and reliability, and how it guides release velocity and incident response.
- 3
How would you monitor a web application to ensure high availability?
Discuss metrics like latency, error rates, and throughput. Mention tools like Prometheus and Grafana, and the importance of alerting on symptoms rather than causes.
- 4
What are SLIs, SLOs, and SLAs? Give an example.
Define each term clearly: SLI is a metric, SLO is a target, SLA is a contract. Provide a concrete example like 99.9% uptime for an API.
Practical Scenarios and Troubleshooting
- 5
A website is slow. How would you troubleshoot the issue?
Walk through a systematic approach: check server metrics (CPU, memory, disk I/O), network latency, application logs, and database performance. Mention tools like top, netstat, and tracing.
- 6
You need to deploy a new version of a service with zero downtime. What strategy would you use?
Discuss blue-green deployment or canary releases. Explain how to use load balancers, health checks, and rollback plans.
- 7
How would you automate the setup of a new server?
Mention configuration management tools like Ansible or Terraform, and scripting with Bash or Python. Emphasize idempotency and version control.
- 8
What steps would you take if a critical service goes down at 3 AM?
Outline incident response: acknowledge alert, assess impact, communicate with stakeholders, mitigate (e.g., restart service), and conduct a post-mortem later.
System Design and Cloud
- 9
Design a highly available and scalable web application on AWS.
Cover load balancers, auto-scaling groups, multi-AZ deployment, and managed databases. Mention monitoring and backup strategies.
- 10
How does Kubernetes help in managing microservices?
Explain orchestration features like self-healing, scaling, and service discovery. Mention pods, deployments, and services.
- 11
What is infrastructure as code, and why is it important for SRE?
Define IaC and discuss tools like Terraform. Highlight benefits: consistency, repeatability, and version control.
- 12
How would you design a logging and monitoring pipeline?
Describe collecting logs with Fluentd, storing in Elasticsearch, and visualizing with Kibana. Include metrics with Prometheus and alerting with Alertmanager.
Behavioral and HR
- 13
Tell me about a time you solved a difficult technical problem.
Use the STAR method. Focus on your thought process, the steps you took, and the outcome. Highlight learning and teamwork.
- 14
How do you handle working under pressure or during an outage?
Emphasize staying calm, prioritizing tasks, communicating clearly, and following incident management procedures.
- 15
Why do you want to work as an SRE, and why our company?
Show passion for reliability and automation. Research the company's products and culture, and align your goals with theirs.
- 16
Describe a time you had to learn a new technology quickly.
Provide a specific example, such as learning Docker for a project. Highlight your learning approach and how you applied it.
Coding round
Site Reliability Engineer interviews usually include a coding round. Practise planning the solution out loud, then review code the AI writes from your plan, in Python, Java, C++, C or JavaScript.
Ready to try it for real?
Take a timed test or talk through a mock interview for this role, then see your scores.
This is practice material for Site Reliability Engineer roles, written with AI. It is not a list of questions Barracuda Networks India or any other company has asked.