Wells Fargo Senior Software Engineer Interview Questions, Process, and Tips

Q1. Is parallel stream always beneficial in java stream API? Java Singleton vs Spring Singleton write a program to find the nth largest number in an array of integers. Spring bean scopes. how will you hand...read more
Ans. 
Parallel stream is not always beneficial in Java Stream API.
• Parallel stream can be slower than sequential stream for small data sets or when the overhead of parallelism is greater than the benefit.

• Parallel stream can be beneficial for large data sets or when the operations are independent and can be executed in parallel.

• It is important to measure the performance of both sequential and parallel streams for a specific us
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Q1. Spring bean scopes Core java design principles SOLID principles
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Q1. Agile ceremonies? what is an ideal team? scenario-based question?
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Q1. How have you implemented dependency injection in your .NET Core projects? How have you used the Razor engine to build dynamic views in your ASP.NET Core projects? Can you explain how you have used Angular ...read more
Ans. 
Answering questions on .NET Core, Razor engine, and Angular
• Implemented dependency injection in .NET Core using built-in DI container or third-party libraries like Autofac or Ninject

• Used Razor engine to build dynamic views by creating Razor views with HTML and C# code to generate dynamic content

• Built single-page applications using Angular by creating components, services, and modules to manage data and UI
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Q2. How have you handled security in your Angular and .NET Core applications, such as implementing JWT or OAuth authentication?
Ans. 
Implemented JWT and OAuth authentication in Angular and .NET Core apps.
• Used Angular's HttpInterceptor to add JWT token to requests

• Implemented OAuth2 authentication using IdentityServer4 in .NET Core

• Stored user credentials securely using ASP.NET Core Identity

• Used HTTPS to encrypt data in transit

• Implemented role-based authorization using ASP.NET Core Identity
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Q1. SQL left join scenario Angular route guard Promise vs observable
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Q2. Performance and security best practices for web application
Ans. 
Best practices for web app performance and security
• Use caching to improve performance

• Minimize HTTP requests and optimize images

• Implement input validation and sanitize user input to prevent attacks

• Use HTTPS and secure authentication methods

• Regularly update software and apply security patches

• Implement rate limiting and other security measures to prevent brute force attacks
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Q1. Can you tell us about your experience working in the financial services industry? How have you handled working on projects with tight deadlines and a high level of regulatory compliance?
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Q2. Can you give an example of a particularly challenging project you have worked on and how you overcame any obstacles during the development process?
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Q1. Coding problem was presented during the interview?
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Q1. SQL server scenario based question
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Q1. C# and SQL Questions of medium and advanced complexity.
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Q1. C# and SQL interview questions.
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Hackerrank test was there and difficult level

Q1. What is react hooks
Ans. 
React Hooks are functions that let you use state and other React features without writing a class.
• React Hooks were introduced in React 16.8 to allow functional components to have state and lifecycle methods.

• They allow you to reuse stateful logic across multiple components without changing the component hierarchy.

• Some commonly used React Hooks are useState, useEffect, useContext, and useReducer.

• Example: useState hook al...read more
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Q2. What us virtual dom
Ans. 
Virtual DOM is a lightweight copy of the actual DOM used for efficient updates in web development.
• Virtual DOM is a concept used in frameworks like React to improve performance by minimizing actual DOM updates.

• Changes are first made to the virtual DOM, then compared with the actual DOM to only update what has changed.

• This process helps reduce the number of manipulations needed on the real DOM, leading to faster renderin
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Q3. React js vs Angular
Ans. 
React js is a lightweight library for building user interfaces, while Angular is a full-fledged framework with more features and complexity.
• React is more flexible and allows for easier integration with other libraries and frameworks.

• Angular provides more out-of-the-box features like routing, forms handling, and dependency injection.

• React is easier to learn and has a larger community support.

• Angular has a steeper learni...read more
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Q4. Component life cycle methods
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Q5. Functional vs class components
Ans. 
Functional components are simpler, stateless, and use hooks. Class components have lifecycle methods and state management.
• Functional components are simpler and easier to read/write.

• Class components have lifecycle methods like componentDidMount, componentDidUpdate, etc.

• Functional components use hooks for state management and side effects.

• Class components use this keyword for accessing props and state.

• Example: Functional...read more
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Q1. Performance Related Questions and Basic Questions on Dot Net Core
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Q2. Authentication and Authorization in .Net core
Ans. 
Authentication and Authorization in .Net core
• Authentication verifies the identity of a user while Authorization checks if the user has access to a resource

• .Net core provides built-in authentication and authorization middleware

• Authentication can be done using various methods like JWT, OAuth, Cookies, etc.

• Authorization can be done using policies, roles, claims, etc.
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Q1. Mainly Focussed on Problem Solving and Designing Solutions
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Q2. Basic SQL Questions like functions, stored procedures, indexes
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