Capgemini DOT NET Developer Interview Questions and Answers

Q1. What is the repository design pattern?
Ans. 
Repository design pattern is a design pattern that separates the data access logic from the business logic in an application.
• It helps in achieving separation of concerns by isolating the data access code in a separate layer.

• It provides a centralized way to access data from various sources such as databases, web services, etc.

• It makes the codebase more maintainable and testable by abstracting the data access logic.

• Examp...read more
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Q2. What is the difference between IEnumerable and IQueryable?
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IEnumerable is used for in-memory collection operations, while IQueryable is used for database query operations.
• IEnumerable is used for querying data from in-memory collections like arrays, lists, etc.

• IQueryable is used for querying data from a database using LINQ to SQL or Entity Framework.

• IEnumerable executes the query in-memory, while IQueryable executes the query on the database server.

• IEnumerable is suitable for L...read more
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Basic oops implementation.

Q1. Explain Millewares and DI ?
Ans. 
Middleware is software that acts as a bridge between an operating system or database and applications, while DI (Dependency Injection) is a design pattern used to increase flexibility and maintainability of code.
• Middleware is software that provides common services and capabilities to applications, such as authentication, logging, and routing.

• DI is a design pattern where the dependencies of a class are injected from the...read more
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Q2. How Authentication works in Web api ?
Ans. 
Authentication in Web API involves verifying the identity of a user or system before granting access to resources.
• Authentication headers like Authorization header are used to send credentials

• Web API can use various authentication methods like JWT, OAuth, Basic Authentication

• Authentication middleware is used to validate credentials and generate tokens

• Access control lists (ACLs) can be used to define permissions for diff...read more
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Q1. Why Capgemini ?
Ans. 
Capgemini is a global leader in consulting, technology services and digital transformation, offering a wide range of opportunities for growth and development.
• Capgemini is a well-established global company with a strong reputation in the IT industry

• They offer a wide range of projects and opportunities for career growth

• Capgemini values innovation and provides a collaborative work environment

• The company has a strong focus...read more
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Q2. How early I can join ?
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Q1. What is MVC ?
Ans. 
MVC stands for Model-View-Controller, a software design pattern for organizing code in a web application.
• MVC separates the application into three main components: Model (data), View (UI), and Controller (logic).

• Model represents the data and business logic of the application.

• View is responsible for displaying the data to the user.

• Controller handles user input, updates the model, and selects the view to display.

• MVC promo...read more
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Q2. Explain pillars of OOP & SOLID principles
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Pillars of OOP are Abstraction, Encapsulation, Inheritance, and Polymorphism. SOLID principles are Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion.
• Pillars of OOP: Abstraction - hiding complex implementation details, Encapsulation - bundling data and methods together, Inheritance - creating new classes from existing ones, Polymorphism - ability to use objects of d...read more
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Q3. What is dependency injection?
Ans. 
Dependency injection is a design pattern where components are given their dependencies rather than creating them internally.
• Dependency injection helps in achieving loose coupling between classes.

• It allows for easier testing by providing a way to mock dependencies.

• There are three types of dependency injection - constructor injection, setter injection, and interface injection.
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Q4. What is async-await?

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Async-await is a feature in C# that allows asynchronous programming for better performance and responsiveness.

• Async-await allows methods to run asynchronously, improving performance by not blocking the main thread.

• It simplifies asynchronous programming by using keywords 'async' and 'await'.

• Example: async Task GetDataAsync() { await Task.Delay(1000); return 1; }

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