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C#/.Net and SQL
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Flashcards in this deck (40)

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  • What is the difference between a reference type and a value type?

    Value types hold data directly; reference types store a reference to data. Value types are on the stack; reference types on the heap. Examples: value types - int, bool; reference types - classes, arrays, strings.

    c# data_types

  • What is a singleton?

    A singleton is a design pattern that restricts a class to a single instance throughout the application's lifecycle.

    c# design_pattern

  • What is the difference between an array and a List?

    Array is fixed-size; List is dynamic and can grow/shrink. Lists provide more functionality like adding/removing elements.

    c# collections

  • What is a dictionary/map?

    A dictionary is a collection of key-value pairs for fast lookups based on keys.

    c# collections

  • How does a hashset differ from a dictionary?

    A hashset stores unique values and does not allow duplicates; a dictionary uses key-value pairs.

    c# collections

  • What is a static field?

    A static field belongs to the class itself and is shared across all instances.

    c# fields

  • How is a static method called?

    A static method is called on the class itself, e.g., ClassName.StaticMethod().

    c# methods

  • What is a namespace?

    A namespace organizes code and prevents naming conflicts by grouping related types.

    c# namespaces

  • What are common access modifiers in C#?

    Public, private, protected, internal, protected internal.

    c# access_modifiers

  • What is the using statement used for?

    The using statement manages resources and ensures IDisposable objects are disposed of properly.

    c# resources

  • What is the difference between abstract classes and interfaces?

    Abstract classes can have both abstract and concrete methods; interfaces can only declare methods without implementation.

    c# oop

  • How does async/await work?

    async marks a method as asynchronous; await pauses execution until the awaited task completes.

    c# asynchronous

  • What is the yield keyword used for?

    To simplify the implementation of iterators when returning values one at a time from a collection.

    programming c# yield

  • What interface is yield commonly used with?

    IEnumerable interface.

    programming c# ienumerable

  • What method is used in LINQ to filter results?

    The Where method.

    programming linq filter

  • What method is used in LINQ to project or convert?

    The Select method.

    programming linq project

  • What methods are used in LINQ to sort results?

    OrderBy and OrderByDescending methods.

    programming linq sort

  • How are IEnumerable and IQueryable similar?

    Both are interfaces used for data querying.

    programming c# ienumerable iqueryable

  • How are IEnumerable and IQueryable different?

    IEnumerable executes queries on the client side, while IQueryable executes on the server side.

    programming c# ienumerable iqueryable

  • What does MVC stand for?

    Model-View-Controller.

    programming mvc

  • What does the Model represent in MVC?

    The data and business logic.

    programming mvc model

  • What does the View represent in MVC?

    The user interface.

    programming mvc view

  • What does the Controller do in MVC?

    Handles user input and interactions, updating the Model and View.

    programming mvc controller

  • What are common return types for an MVC action?

    ViewResult, JsonResult, RedirectResult, ContentResult, FileResult.

    programming mvc return_types

  • What is dependency injection?

    A design pattern for achieving Inversion of Control between classes and their dependencies.

    programming di design_pattern

  • Why is dependency injection important?

    It makes code more modular, testable, and maintainable.

    programming di importance

  • What is the Transient scope in DI?

    A new instance is created each time it is requested.

    programming di scopes

  • What is the Singleton scope in DI?

    A single instance is created and shared throughout the application.

    programming di scopes

  • What is the Scoped scope in DI?

    A new instance is created once per request or scope.

    programming di scopes

  • What is middleware in ASP.NET Core?

    A component that processes HTTP requests and responses.

    programming asp.net middleware

  • What are filters in ASP.NET MVC?

    Used to execute code before or after certain stages of request processing.

    programming asp.net filters

  • What is model binding in ASP.NET MVC?

    Mapping HTTP request data to action method parameters.

    programming asp.net model_binding

  • What is attribute routing in ASP.NET MVC?

    Defining routes directly on controller actions using attributes.

    programming asp.net routing

  • What are RESTful principles in Web API development?

    Creating APIs that use standard HTTP methods and are stateless.

    programming web_api rest

  • What HTTP methods are used in RESTful APIs?

    GET, POST, PUT, DELETE.

    programming web_api http_methods

  • What methods do REST APIs use?

    GET, POST, PUT, DELETE

    apis http methods

  • What type of URIs do REST APIs provide?

    Meaningful resource URIs

    apis uris

  • What is a key characteristic of REST APIs?

    They are stateless

    apis stateless

  • What do REST APIs follow to be predictable?

    Conventions

    apis conventions

  • Why are REST APIs easy to use?

    They are predictable

    apis usability