This video covers cognizant interview of 5 years of experience candidate and he was asked many questions related to microservices and he got selected. Questions: Suppose a service needs to call multiple other microservices to serve one request — how do you avoid performance degradation or cascading failures? Have you ever had to break a monolith into microservices? What were the hardest parts — data ownership, deployment, or inter-service communication? How do you maintain data consistency across multiple microservices with their own databases? If two microservices need to query the same data for reporting, how would you design that without tight coupling? In your experience, what are the best practices for API versioning? How do you roll out changes with zero downtime? How have you implemented idempotency in REST APIs, especially in payment or order workflows? Describe a real-world incident where a dependent microservice went down. How did your system handle it? How do you ensure observability (traceability of a single request across services)? How do you deploy multiple microservices together while ensuring they remain independently deployable? How do you perform load testing and capacity planning for distributed services?