HTC Global Services 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

This code snippet demonstrates a simple algorithm to find the maximum value in an array.

• Initialize a variable 'max' to the first element of the array.

• Iterate through the array starting from the second element.

• If the current element is greater than 'max', update 'max'.

• Return 'max' after completing the iteration.

• Example: For array [3, 5, 2, 8, 1], the output will be 8.

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 ...read more

Extract data source is a static snapshot while live data source is real-time data. Data blending combines data from multiple sources.

• Extract data source is a subset of data from a larger data source that is saved as a static snapshot.

• Live data source is real-time data that is directly connected to the source system.

• Data blending combines data from multiple sources to create a unified view.

• Extract data source is faster ...read more