Senior Technical Architect

Senior Technical Architect Interview Questions and Answers

Updated 7 Aug 2024
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Q1. How ErrorHandling is done in your project?

Ans.

Error handling in our project is implemented using try-catch blocks and custom exception classes.

  • We use try-catch blocks to catch exceptions and handle them appropriately.

  • We have custom exception classes for specific types of errors to provide more detailed information.

  • We log errors to a centralized logging system for monitoring and troubleshooting.

  • We have defined error codes and messages for easier identification and resolution of issues.

Q2. Where Observer pattern used in SpringBoot?

Ans.

The Observer pattern is used in SpringBoot for implementing event handling and notification mechanisms.

  • The Observer pattern is commonly used in SpringBoot for implementing event listeners and publishers.

  • It allows objects to subscribe to and receive notifications about changes or events in other objects.

  • Spring's ApplicationEvent and ApplicationListener interfaces are examples of the Observer pattern in action.

  • Listeners can be registered with the ApplicationEventPublisher to re...read more

Q3. Explain L and D in SOLID with examples?

Ans.

Liskov Substitution Principle (L) and Dependency Inversion Principle (D) in SOLID

  • Liskov Substitution Principle (L) states that objects of a superclass should be replaceable with objects of its subclasses without affecting the program's correctness.

  • Dependency Inversion Principle (D) states that high-level modules should not depend on low-level modules. Both should depend on abstractions.

  • Example for Liskov Substitution Principle: If a program expects a base class, it should be ...read more

Q4. How to debug crash dumps?

Ans.

Debugging crash dumps involves analyzing the dump file to identify the cause of the crash.

  • Use a debugger tool to analyze the dump file

  • Identify the exception code and the module where the crash occurred

  • Check for memory leaks and corruption

  • Analyze the call stack to identify the root cause

  • Use symbols to decode the stack trace

  • Look for any relevant logs or events leading up to the crash

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Q5. What is the dangling pointer?

Ans.

A dangling pointer is a pointer that points to a memory location that has been deallocated or freed.

  • Dangling pointers can cause crashes or unexpected behavior.

  • They occur when a pointer is not set to NULL after the memory it points to is freed.

  • Using a dangling pointer can lead to security vulnerabilities.

  • Dangling pointers can be avoided by setting pointers to NULL after freeing memory.

Q6. Design sn app with admin snd user roles

Ans.

Create an app with admin and user roles

  • Implement role-based access control (RBAC)

  • Admins have access to all features and can manage users

  • Users have limited access based on their role

  • Use authentication and authorization mechanisms

  • Consider using frameworks like Spring Security or Django's authentication system

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Q7. Describe security in micro services

Ans.

Security in microservices involves implementing authentication, authorization, encryption, and monitoring.

  • Implement authentication and authorization mechanisms to control access to microservices

  • Use encryption to secure communication between microservices

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

  • Consider using API gateways for centralized security control

  • Implement rate limiting and throttling to prevent abuse and attacks

Q8. details of solution architecture

Ans.

Solution architecture involves designing and describing the structure, behavior, and views of a system.

  • Identifying key components and their interactions

  • Defining data flow and communication protocols

  • Ensuring scalability, performance, and security

  • Creating detailed diagrams and documentation

  • Collaborating with stakeholders to align with business goals

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Q9. Association vs aggregation

Ans.

Association represents a relationship between two objects, while aggregation represents a relationship where one object owns or contains another object.

  • Association is a weaker relationship than aggregation.

  • Aggregation is a type of association.

  • In association, objects have an independent lifecycle, while in aggregation, objects have a dependent lifecycle.

  • Example of association: A student can have multiple teachers. Example of aggregation: A car has an engine.

  • Association is repr...read more

Q10. Gen Ai use case

Ans.

Gen Ai use case involves utilizing artificial intelligence to generate personalized content or recommendations based on user data.

  • Personalized product recommendations on e-commerce websites

  • Customized content suggestions on streaming platforms

  • Tailored marketing campaigns based on user behavior

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