Experis Lead Architect Interview Questions and Answers

Q1. Dependency Injection
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Q1. What is static class. What is polymorphism Basic's of Oops concept. How to improve performance of query in sql.
Ans. 
Static class is a class that cannot be instantiated and its members can be accessed without creating an object. Polymorphism is the ability of an object to take on many forms. OOP is a programming paradigm based on the concept of objects.
• Static class is used for creating utility classes or for grouping related methods and properties.

• Polymorphism allows objects of different classes to be treated as if they were of the s...read more
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Q2. Basics of C#, ASP.Net , SQL , Javascript , Azure. They have asked everything.
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Q1. Explain the architecture
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The architecture is the overall design and structure of a system or application.
• It includes the components, their relationships, and how they interact with each other.

• It determines the system's scalability, performance, and maintainability.

• It can be divided into different layers such as presentation, business logic, and data access.

• Examples include client-server architecture, microservices architecture, and event-drive
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Q2. Why those technologies chosen
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Scenario based questions with handson issues faced

Q1. Why changing company
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Collection, springboot, kafka, technical design

Q1. Spring boot microsevices
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Q1. Compensation, reason for changing job, notice period, immediate joining
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Q1. Cloud related (AWS/AZURE/GCP,Private Cloud)
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Q1. How do you scale a e-commerce application
Ans. 
Scaling an e-commerce application involves optimizing performance, increasing capacity, and ensuring reliability.
• Utilize cloud services for scalability and flexibility

• Implement caching mechanisms to reduce load on servers

• Use load balancing to distribute traffic evenly across servers

• Optimize database queries and indexes for faster retrieval

• Monitor performance metrics and adjust resources accordingly
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Q2. How to do you handle distributed transaction
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Distributed transactions are handled using two-phase commit protocol and distributed locking mechanisms.
• Use two-phase commit protocol to ensure atomicity across multiple databases.

• Implement distributed locking mechanisms to maintain consistency.

• Consider using compensating transactions to handle failures and rollbacks.

• Use messaging queues for communication between distributed components.
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