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Presidio Solutions Pvt Ltd Interview Questions and Answers

Updated 23 Aug 2024

Q1. What is difference between helm2 and helm3?

Ans.

Helm2 is Tiller-based, Helm3 is Tiller-less. Helm3 has improved security, performance, and reliability.

  • Helm2 relies on Tiller for managing releases, Helm3 removes Tiller completely.

  • Helm3 has improved security by removing Tiller, reducing attack surface.

  • Helm3 has better performance due to simplified architecture.

  • Helm3 offers better reliability with features like library charts and improved release management.

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Q2. Develop an application within given frame time using the tech stack that you know

Ans.

Develop a web application using React, Node.js, and MongoDB within 2 weeks

  • Start by setting up the backend with Node.js and Express

  • Create the frontend using React for a responsive user interface

  • Use MongoDB for database management and integration with Node.js

  • Implement RESTful APIs for communication between frontend and backend

  • Test the application thoroughly before deployment

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Q3. What is retesting and regression testing Defect tracking tool Sdlc,stlc,test case writing , test case design techniques

Ans.

Retesting is testing the same functionality again after fixing the defects. Regression testing is testing the entire system after changes.

  • Retesting ensures that the defects have been fixed and the functionality is working as expected.

  • Regression testing ensures that the changes made to the system have not affected the existing functionality.

  • Defect tracking tool is used to track and manage defects found during testing.

  • SDLC (Software Development Life Cycle) is the process of dev...read more

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Q4. What is Circuit Breaker in Microservices

Ans.

Circuit Breaker is a design pattern used in microservices to prevent cascading failures.

  • Circuit Breaker monitors the availability of a service and prevents requests from being sent if the service is unavailable.

  • It helps in improving the resilience of the system by providing a fallback mechanism.

  • When the Circuit Breaker is open, it redirects calls to a predefined fallback method or returns an error response.

  • Once the service is back online, the Circuit Breaker can be reset to a...read more

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Q5. What is Singleton Pattern

Ans.

Singleton pattern ensures a class has only one instance and provides a global point of access to it.

  • Used to restrict the instantiation of a class to one object

  • Provides a global point of access to the instance

  • Commonly used in logging, caching, thread pools, database connections

  • Example: Database connection manager class with a single instance

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Q6. Authorization vs Authentication

Ans.

Authentication verifies the identity of a user, while authorization determines what resources a user can access.

  • Authentication confirms the identity of a user through credentials like username and password.

  • Authorization determines the permissions and access levels of a user once their identity is confirmed.

  • Example: Logging into a website (authentication) and then being able to view/edit specific pages based on your user role (authorization).

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