Experience Level
3-5 Years
Real interview questions with expert answers, plain-English explanations, and practical examples. (200 questions)
VMware
DevOps Engineer
Containers & Kubernetes
How does Kubernetes actually achieve self-healing for containerized applications, and what are its core components involved?
Swiggy
AI Engineer
Performance Optimization
How would you optimize an AI/ML model for production deployment, considering both latency and resource utilization?
PayPal
Backend Developer
Message Queues
How do message queues ensure reliable delivery and what are the tradeoffs of at-least-once vs exactly-once processing?
Uber
DevOps Engineer
Authentication & Authorization
How would you secure communication and access between microservices, specifically considering service-to-service authentication and authorization?
Netflix
Backend Developer
Caching
When would you use different caching strategies like write-through or write-back, and how do you handle cache invalidation?
ServiceNow
Cloud Engineer
Cloud Architecture
How do you design a highly available and fault-tolerant cloud application?
Microsoft
Backend Developer
API Design
How do you design an idempotent API endpoint, and why does it matter for payment retries?
Flipkart
Frontend Developer
React
How does React’s reconciliation (virtual DOM diffing) actually decide what to re-render?
Adobe
Backend Developer
Concurrency
Explain a race condition and how a mutex actually prevents it, with a concrete example.
Salesforce
Cloud Engineer
Containers & Kubernetes