Global tech
Heap India Site Reliability Engineer Interview: Rounds, Questions and Preparation
For Site Reliability Engineer roles at companies like Heap India
What the job involves
Site Reliability Engineers (SREs) at fast-growing global tech companies ensure that production systems are reliable, scalable, and efficient. They split their time between software engineering (automation, tooling) and operations (incident response, capacity planning). In smaller firms, an SRE may wear multiple hats, from debugging latency spikes to building observability dashboards.
Role and Technical Knowledge
- 1
What is the difference between a Site Reliability Engineer and a DevOps Engineer?
Highlight that SRE applies software engineering to operations, with a focus on reliability, SLOs, and error budgets, while DevOps is a broader cultural movement. Mention that SRE is a specific implementation of DevOps principles.
- 2
Explain SLI, SLO, and SLA with an example.
Define SLI as a metric (e.g., request latency), SLO as a target (e.g., 99.9% of requests < 200ms), and SLA as a contract with consequences. Use a web service example to illustrate.
- 3
How does Kubernetes help in achieving high availability?
Discuss self-healing, rolling updates, replica sets, and multi-zone deployments. Mention liveness and readiness probes.
- 4
What are some common causes of latency in a web application, and how would you diagnose them?
Cover network, database, application code, and external dependencies. Mention tools like tracing, profiling, and log analysis.
Practical Scenarios
- 5
You get an alert that a production server's CPU is at 100%. What steps do you take?
Start with triage: check if it's a single server or many, identify the process, and see if it's a known issue. Then mitigate (restart, scale out) and investigate root cause.
- 6
A deployment caused a sudden increase in error rates. How do you handle it?
Roll back immediately, then investigate logs and metrics to find the cause. Communicate with stakeholders and document the incident.
- 7
How would you design a system to monitor a service's health and alert on issues?
Mention metrics (latency, error rate, saturation), logging, tracing, and alerting thresholds. Discuss avoiding alert fatigue by using SLO-based alerts.
- 8
You need to automate a repetitive task. Walk me through your approach.
Identify the task, choose a scripting language (Python/Bash), write idempotent code, test in staging, and deploy with version control. Mention cron jobs or CI/CD integration.
Behavioural and Situational
- 9
Tell me about a time you had to troubleshoot a technical problem under pressure.
Use STAR method: describe the situation, your actions (e.g., methodical debugging, communication), and the positive outcome. Emphasise staying calm and learning from it.
- 10
How do you prioritise tasks when multiple incidents occur simultaneously?
Discuss impact-based prioritisation (customer-facing vs internal), using severity levels, and delegating or escalating when needed. Mention clear communication.
- 11
Describe a situation where you had to explain a complex technical issue to a non-technical person.
Show empathy and clarity: use analogies, avoid jargon, and confirm understanding. Highlight the importance of communication in SRE.
- 12
Why do you want to work as an SRE, and how do you handle on-call responsibilities?
Express passion for reliability and automation. Acknowledge the challenges of on-call but show willingness to learn and maintain work-life balance.
HR and Company Fit
- 13
Why are you interested in working at a fast-growing company like Heap India?
Research the company's product and culture. Connect your skills to their needs, and show enthusiasm for the impact you can make in a smaller team.
- 14
Where do you see yourself in the next 3-5 years?
Align your growth with the role: deepening reliability expertise, taking on more responsibility, and contributing to scalable systems.
- 15
What are your salary expectations?
Research industry standards for freshers in India. Provide a range and express flexibility, focusing on overall compensation and growth opportunities.
- 16
Do you have any questions for us?
Ask about team structure, on-call rotation, learning opportunities, or current reliability challenges. Shows genuine interest and engagement.
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 Heap India or any other company has asked.