BNP Paribas India Solutions Technical Architect Interview Questions and Answers

Q1. Describe 5 non functional requirements
Ans. 
Non functional requirements are criteria that specify how a system should behave, rather than what it should do.
• Performance - system should respond within 2 seconds for all user interactions

• Scalability - system should be able to handle 1000 concurrent users

• Reliability - system should have a 99.99% uptime

• Security - system should encrypt all sensitive data

• Usability - system should have a user-friendly interface
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Q2. How will you improve performance of legacy app which has to work with your latest microservice.
Ans. 
Improve legacy app performance by optimizing code, implementing caching, and scaling resources.
• Optimize code by identifying and removing bottlenecks

• Implement caching to reduce database calls and improve response time

• Scale resources by using containers or serverless architecture

• Use asynchronous processing for long-running tasks

• Upgrade hardware or infrastructure if necessary
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Q1. Explain security in microservices
Ans. 
Security in microservices involves implementing authentication, authorization, encryption, and monitoring to protect data and services.
• Implement authentication and authorization mechanisms to control access to microservices.

• Use encryption to secure communication between microservices and external clients.

• Implement monitoring and logging to detect and respond to security incidents.

• Consider using API gateways for central...read more
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Q2. Describe microservices architecture for a wealth management app
Ans. 
Microservices architecture for a wealth management app involves breaking down the application into smaller, independent services.
• Each microservice focuses on a specific business function, such as client onboarding, portfolio management, or reporting.

• Services communicate through APIs, allowing for flexibility and scalability.

• Each microservice can be developed, deployed, and scaled independently, leading to faster develo...read more
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Q1. System architecture
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Q2. Cloud computing
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Q1. Backup strategy
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Q2. Storage architecture
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Q1. Explain virtual dom in React.
Ans. 
Virtual DOM is a lightweight copy of the actual DOM in React, used for efficient updates.
• Virtual DOM is a concept where a lightweight copy of the actual DOM is created in memory.

• When changes are made to the virtual DOM, React compares it with the actual DOM to identify the minimal number of updates needed.

• This process helps in optimizing performance by reducing the number of actual DOM manipulations.

• Example: When a use...read more
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Q2. How do you implement passwordless system
Ans. 
Implementing passwordless system involves using alternative authentication methods.
• Use email or SMS verification codes

• Implement biometric authentication

• Utilize hardware security keys

• Implement OAuth or OpenID Connect for single sign-on

• Leverage FIDO2 standards for passwordless authentication
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Q1. What to do for a cookieless system
Ans. 
To create a cookieless system, use alternative methods like local storage or URL parameters for tracking user data.
• Use local storage to store user data on the client side

• Utilize URL parameters to pass data between pages

• Implement server-side session management for user authentication

• Consider using JSON Web Tokens (JWT) for secure data transmission
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Q2. Explain in detail S.O.L.I.D principles
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S.O.L.I.D principles are a set of five design principles in object-oriented programming to make software designs more understandable, flexible, and maintainable.
• Single Responsibility Principle (SRP) - A class should have only one reason to change.

• Open/Closed Principle (OCP) - Software entities should be open for extension but closed for modification.

• Liskov Substitution Principle (LSP) - Objects of a superclass should b...read more
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Q1. About my Skills
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Q2. Why would you join Virtusa?
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Q1. Current Project related questions
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Q2. Scenario based questions
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Q3. Approach for a project from scratch
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Q4. Insurance/Banking related questions
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Q1. Architectural related questions
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Q2. Technology related questions
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Q3. Differences between current and previous technologies
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Current technologies are more advanced, efficient, and user-friendly compared to previous technologies.
• Current technologies have faster processing speeds and higher storage capacities.

• Previous technologies often required manual input and were less intuitive for users.

• Current technologies offer more connectivity options and seamless integration with other devices.

• Examples: Smartphones vs. flip phones, cloud computing vs
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Q4. What's the future of current skill you are holding
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Q1. Functional related questions
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Q2. Managerial questions
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Q1. Client round, current project
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Q2. Current project scenario, what's your approach
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Q3. How would you handle this scenario
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Q4. Insurance related questions
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Q1. Client round, discuss multiple scenarios
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Q2. Insurance domain related questions
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Q3. Security related questions
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Q4. Authentication related questions
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Q1. Salary discussion
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Q2. Expected Joining date
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Q3. What's the Notice period
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Q1. Define a micro service architecture.
Ans. 
Microservice architecture is an architectural style that structures an application as a collection of loosely coupled services.
• Each service is self-contained and can be independently deployed, scaled, and maintained.

• Services communicate with each other over lightweight protocols like HTTP or messaging queues.

• Each service is responsible for a specific business function and can be developed using different technologies.

• M...read more
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Q2. How to address data inconsistency in micro service architecture?
Ans. 
Data inconsistency in micro service architecture can be addressed by implementing event-driven architecture, using distributed transactions, and ensuring eventual consistency.
• Implement event-driven architecture to propagate changes across services in a consistent manner

• Use distributed transactions to ensure atomicity and consistency across multiple services

• Ensure eventual consistency by designing services to handle eve...read more
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Singleton Pattern with coding example class

Q1. Service lifetime
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Q2. Shared or static class
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Q1. Well prepare for AD ,GPO and troubleshooting. Networking requirements for migration AD security concepts
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Q2. DC locator and LDAP records
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Q3. LDAP and DNS records
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Q4. Kerberos knowledge
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