Amadeus Technical Lead Interview Questions and Answers

Implemented the Observer design pattern.

• Used to maintain consistency between related objects

• Allows for one-to-many relationships between objects

• Used in event-driven systems

• Example: Used to update UI when data changes in backend

I have implemented a microservices architecture for scalability and flexibility.

• Implemented microservices architecture using Docker and Kubernetes

• Used API Gateway for routing and load balancing

• Implemented service discovery using Consul

• Implemented circuit breaker pattern using Hystrix

• Implemented centralized logging using ELK stack

• Implemented distributed tracing using Zipkin

• Implemented event-driven architecture using Kaf...read more

I improved stored procedure performance by optimizing queries and indexes.

• Identified and removed unnecessary joins and subqueries

• Used appropriate indexing to speed up query execution

• Reduced the number of round trips to the database by using batch processing

• Rewrote complex queries to simpler ones

• Used stored procedure parameters instead of variables to avoid recompilation

• Used SET NOCOUNT ON to reduce network traffic

• Used

Implementing naming of threads in a multi-threaded OS and implementing rand5 using rand7

• Use thread ID or thread name to name threads in a multi-threaded OS

• Implement a function that generates a random number between 1 and 7

• Use rejection sampling to implement rand5 using rand7

• Ensure thread names are unique to avoid confusion

• Test the implementation thoroughly to ensure correctness

Free uses metadata stored in the heap to determine the number of memory blocks to delete for arrays.

• Free stores metadata about the size of the allocated memory block in the heap.

• Free uses this metadata to determine the number of memory blocks to delete for arrays.

• For example, if an array of 10 integers was allocated, the metadata would indicate the size of the block as 40 bytes.

• Free would then use this information to d...read more