10+ Persistent Systems Project Lead Interview Questions and Answers

Interview questions for Project Lead position covering API testing, HTTP error codes, performance testing, Java, authentication, Swagger, AWS, and project-related questions.

• API testing involves testing the functionality, reliability, performance, and security of APIs.

• HTTP error codes are status codes returned by a server to indicate the status of a request.

• APIs can be tested using tools like Postman, SoapUI, and JMeter.

• Types of APIs include REST, SOAP, and GraphQL.

• Java and OO...read more

The initial steps involve understanding the client requirements, analyzing the scope of work, and creating a plan for API development.

• Meet with the client to discuss their requirements and goals for the APIs

• Gather detailed information about the data and functionality that the APIs need to provide

• Analyze the scope of work and determine the resources and timeline needed for development

• Create a plan outlining the steps involved in API development, including design, implementatio...read more

Custom middleware in .Net Core is required when we need to add additional processing logic to the request pipeline.

• Custom authentication

• Request logging

• Error handling

• Response compression

Backpropagation is a method used in neural networks to update the weights of the network by calculating the gradient of the loss function.

• Backpropagation involves calculating the gradient of the loss function with respect to each weight in the network.

• The gradients are then used to update the weights in the network in order to minimize the loss function.

• This process is repeated iteratively until the network converges to a set of weights that minimize the loss function.

• Backpro...read more

Design patterns in .Net Core help in structuring code for better maintainability and scalability.

• Design patterns like Singleton, Factory, and Dependency Injection are commonly used in .Net Core.

• They help in separating concerns, improving code reusability, and making code more testable.

• Lifetime management in .Net Core refers to how long an object should exist in the application.

• Transient, Scoped, and Singleton are the three main lifetime options in .Net Core.

• For example, a Sin...read more

Implementing convolution in C++

• Use nested loops to iterate over the input and kernel matrices

• Apply the convolution operation by multiplying corresponding elements and summing them up

• Handle edge cases by padding the input matrix if necessary

• Consider using libraries like OpenCV for optimized implementations

UX process involves understanding user needs, designing solutions, and testing them for usability.

• Research user needs and behaviors

• Create user personas and scenarios

• Design user interfaces and interactions

• Test and iterate designs based on user feedback

• Implement and launch the final product

• Continuously gather user feedback and make improvements

• Examples: user interviews, wireframing, prototyping, usability testing

Our current project architecture is based on microservices using Docker containers and Kubernetes for orchestration.

• Microservices architecture

• Docker containers

• Kubernetes for orchestration

Map function applies a function to each element in an array and returns a new array with the results.

• Use the map function to iterate over each element in the array and apply a function to it.

• Example: const numbers = [1, 2, 3]; const doubled = numbers.map(num => num * 2); // [2, 4, 6]