Principal Architect

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10+ Principal Architect Interview Questions and Answers

Updated 20 Dec 2024

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Q1. Have you worked on gRPC , Kafka and payment gateway ?

Ans.

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.

Q2. What is the process in which cross-border trade is executed

Ans.

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

Q3. Coding problem to design REST APIs to update Employee First name in the database ?

Ans.

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

Q4. What tools you have used for Unit testing ?

Ans.

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

  • JUnit

  • NUnit

  • MSTest

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Q5. What is the reason why DLT is used for trade?

Ans.

DLT is used for trade to ensure transparency, security, and efficiency.

  • DLT provides a decentralized and immutable ledger for recording transactions.

  • It eliminates the need for intermediaries, reducing costs and increasing speed.

  • Smart contracts can be used to automate trade processes and ensure compliance.

  • Examples include blockchain-based trade finance platforms like we.trade and Marco Polo.

  • DLT can also enable new forms of trade, such as tokenization of assets and peer-to-peer ...read more

Q6. What do you know about Credit Card Transaction lifecycle

Ans.

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

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Q7. What is your experience in Microservices?

Ans.

I have over 10 years of experience designing and implementing Microservices architecture in various projects.

  • Designed and implemented Microservices architecture for a large e-commerce platform, improving scalability and performance.

  • Utilized containerization technologies like Docker and orchestration tools like Kubernetes to deploy and manage Microservices.

  • Implemented API gateways and service discovery mechanisms to facilitate communication between Microservices.

  • Worked on brea...read more

Q8. What do you know about microservices

Ans.

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

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Q9. Any complex design which you implemented

Ans.

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

Q10. Provide details of current system architecture

Ans.

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

Q11. Experience with process design tools

Ans.

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

Q12. Current Project Architecture..

Ans.

Our current project architecture follows a microservices approach with containerization using Docker and orchestration with Kubernetes.

  • Microservices architecture for scalability and flexibility

  • Containerization with Docker for easy deployment and management

  • Orchestration with Kubernetes for automated scaling and load balancing

Q13. microservice design principles

Ans.

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

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