10+ Principal Architect Interview Questions and Answers

Yes, I have experience working with gRPC, Kafka, and payment gateways.

• I have implemented gRPC for building high-performance, scalable APIs.

• I have used Kafka for real-time data streaming and processing.

• I have integrated payment gateways like PayPal and Stripe for secure online transactions.

Cross-border trade involves a complex process of documentation, transportation, and customs clearance.

• The exporter prepares the necessary documents such as commercial invoice, packing list, and bill of lading.

• The goods are transported to the port of departure and loaded onto a vessel or aircraft.

• Customs clearance is obtained at the port of arrival, which involves paying duties and taxes and presenting the necessary documents.

• The goods are then transported to the final destina...read more

Design REST APIs to update Employee First name in the database

• Create a PUT endpoint '/employees/{id}' to update employee first name

• Use proper authentication and authorization mechanisms to secure the API

• Validate input data to prevent SQL injection or other security vulnerabilities

I have used tools like JUnit, NUnit, and MSTest for unit testing.

• JUnit

• NUnit

• MSTest

Credit card transaction lifecycle involves authorization, clearing, and settlement processes.

• Authorization: Initial approval of the transaction by the card issuer.

• Clearing: The process of exchanging transaction details between the merchant and the card issuer.

• Settlement: The final transfer of funds from the cardholder's account to the merchant's account.

• Chargeback: A reversal of a transaction due to disputes or fraud.

• Interchange fees: Fees paid between the merchant's bank and...read more

Microservices are a software development approach where applications are built as a collection of small, independent services.

• Microservices architecture breaks down a large application into smaller, independent services that can be developed, deployed, and scaled independently.

• Each microservice is responsible for a specific task and communicates with other services through APIs.

• Microservices promote flexibility, scalability, and faster development cycles.

• Examples of companies...read more

Designed a complex cloud-based microservices architecture for a large e-commerce platform

• Implemented service discovery using Consul for dynamic service registration and discovery

• Utilized Kubernetes for container orchestration and scaling

• Designed event-driven architecture using Kafka for real-time data processing

• Implemented API gateway using Kong for centralized access control and monitoring

Current system architecture includes microservices, containerization, and cloud deployment.

• Utilizes microservices architecture for scalability and flexibility

• Uses containerization technology like Docker for easy deployment and management

• Leverages cloud services such as AWS or Azure for infrastructure

• Follows DevOps practices for continuous integration and delivery

Experience with various process design tools such as BPMN, UML, and ERD

• Proficient in using BPMN for business process modeling

• Skilled in creating UML diagrams for system design

• Familiar with Entity-Relationship Diagrams (ERD) for database design

• Experience with tools like Microsoft Visio, Lucidchart, and Enterprise Architect

• Ability to translate business requirements into process design using appropriate tools

Microservice design principles focus on modularity, scalability, resilience, and autonomy.

• Decompose the application into small, independent services

• Design services around business capabilities

• Use lightweight communication protocols like HTTP or messaging queues

• Ensure each service is responsible for its own data storage

• Implement fault tolerance and graceful degradation

• Automate testing and deployment processes