Entity Framework Core Interview Questions

What Is Entity Framework Core?

Entity Framework (EF) Core is a lightweight, extensible, and cross-platform version of Entity Framework.

Entity Framework Core (EF Core) is a complete rewrite of EF6 that was first released in 2016. It ships in Nuget packages, the main one being Microsoft.EntityFrameworkCore.

Entity Framework (EF) Core is a lightweight, extensible, open source and cross-platform version of the popular Entity Framework data access technology.

EF Core was designed to provide a developer experience similar to EF6.

Most of the top-level APIs remain the same, so EF Core will feel familiar to developers who have used EF6.

Installing Entity Framework Core

https://docs.microsoft.com/en-us/ef/core/get-started/install/

What Is Entity Framework?

Entity Framework is an object-relational mapper (O/RM) that enables .NET developers to work with a database using .NET objects. It eliminates the need for most of the data-access code that developers usually need to write.

What Are the EF6 features which are not supported in EF Core 2.0?

1. EDMX/ Graphical Visualization of Model

2. Entity Data Model Wizard (for DB-First approach)

3. ObjectContext API

4. Querying using Entity SQL

5. Automated Migration

6. Inheritance: Table per type (TPT)

7. Inheritance: Table per concrete class (TPC)

8. Many-to-Many without join entity

9. Entity Splitting

10. Spatial Data

11. Lazy loading of related data

12. Stored procedure mapping with DbContext for CUD operation

13. Seed data

14. Automatic migration

What are the EF Core features which are not supported in EF 6?

EF Core offers new features that won't be implemented in EF6:

1. Easy relationship configuration

2. Batch INSERT, UPDATE, and DELETE operations

3. In-memory provider for testing

4. Support for IoC (Inversion of Control)

5. Unique constraints

6. Shadow properties

7. Alternate keys

8. Global query filter

9. Field mapping

10. DbContext pooling

11. Better patterns for handling disconnected entity graphs

Reference link…

What following features and concepts EF Core continues to support, same as EF 6?

1. DbContext

2. DbSet

3. Data Model

4. Querying using Linq-to-Entities

5. Change Tracking

6. SaveChanges

7. Migrations

What's New in Entity Framework (EF) Core 3.0?

1. LINQ improvements

2. Cosmos DB support

3. Dependent entities sharing the table with the principal are now optional

4. C# 8.0 support

5. Reverse engineering of database views

6. Property bag entities

7. Entity Framework 6 (EF 6.3) on .NET Core

What's New in .NET Core 3.0 Features?

Explore link…

For more FAQs about EF Core including 3.0

https://docs.microsoft.com/en-us/ef/core/what-is-new/ef-core-3.0/

By Anil Singh | Rating of this article (*****)

Angular 2, 4, 5, 6, 7, 8 and 9 Interview Questions and Answers -Books

» Are you preparing for Angular Interview? Buy this book (Including Angular 8, 7, 6, 5,4, 2) Interview Q/A Interview Q/A Interview Q/A Interview Q/A Interview Q/A Interview Q/A Interview Q/A » A Complete Guide Book of Angular 9 This is a concise, complete overview of the key aspects of Angular 9. It is fully up to date with the latest release of Angular. This article provide all the important aspects required for angular developers looking for brief and useful content... Posted In Angular 9 » A Complete Guide Book of Angular 8 This is a concise, complete overview of the key aspects of Angular 9. It is fully up to date with the latest release of Angular. This article provide all the important aspects required for angular developers looking for brief and useful content... Posted In Angular 8 » A Complete Guide Book of Angular 7 This is a concise, complete overview of the key aspects of Angular 7. It is fully up to date with the latest release of Angular. This

39 Best Object Oriented JavaScript Interview Questions and Answers

Most Popular 37 Key Questions for JavaScript Interviews. What is Object in JavaScript? What is the Prototype object in JavaScript and how it is used? What is "this"? What is its value? Explain why "self" is needed instead of "this". What is a Closure and why are they so useful to us? Explain how to write class methods vs. instance methods. Can you explain the difference between == and ===? Can you explain the difference between call and apply? Explain why Asynchronous code is important in JavaScript? Can you please tell me a story about JavaScript performance problems? Tell me your JavaScript Naming Convention? How do you define a class and its constructor? What is Hoisted in JavaScript? What is function overloadin

25 Best Vue.js 2 Interview Questions and Answers

What Is Vue.js? The Vue.js is a progressive JavaScript framework and used to building the interactive user interfaces and also it’s focused on the view layer only (front end). The Vue.js is easy to integrate with other libraries and others existing projects. Vue.js is very popular for Single Page Applications developments. The Vue.js is lighter, smaller in size and so faster. It also supports the MVVM ( Model-View-ViewModel ) pattern. The Vue.js is supporting to multiple Components and libraries like - ü Tables and data grids ü Notifications ü Loader ü Calendar ü Display time, date and age ü Progress Bar ü Tooltip ü Overlay ü Icons ü Menu ü Charts ü Map ü Pdf viewer ü And so on The Vue.js was developed by “ Evan You ”, an Ex Google software engineer. The latest version is Vue.js 2. The Vue.js 2 is very similar to Angular because Evan You was inspired by Angular and the Vue.js 2 components looks like -

nullinjectorerror no provider for httpclient angular 17

In Angular 17 where the standalone true option is set by default, the app.config.ts file is generated in src/app/ and provideHttpClient(). We can be added to the list of providers in app.config.ts Step 1: To provide HttpClient in a standalone app we could do this in the app.config.ts file, app.config.ts: import { ApplicationConfig } from '@angular/core'; import { provideRouter } from '@angular/router'; import { routes } from './app.routes'; import { provideClientHydration } from '@angular/platform-browser'; //This (provideHttpClient) will help us to resolve the issue import {provideHttpClient} from '@angular/common/http'; export const appConfig: ApplicationConfig = { providers: [ provideRouter(routes), provideClientHydration(), provideHttpClient () ] }; The appConfig const is used in the main.ts file, see the code, main.ts : import { bootstrapApplication } from '@angular/platform-browser'; import { appConfig } from '

AngularJs input date format calendar

Table of Context bout the input date. Click for live demo on plnker 1. Allow to use of a custom date format like "yyyy/MM/dd" or "yyyy-MM-dd" etc. 2. Allow to check the input date typed by the user is correct or not. 1 2 3 4 //The model must be a Date object, otherwise Angular will throw an error. //The error is Invalid Date objects will be rendered as an empty string. i.e. The dates whose getTime() is NaN. //The model must be a Date object, otherwise Angular will throw an error. //The error is Invalid Date objects will be rendered as an empty string. i.e. The dates whose getTime() is NaN. The Example 1 code as given below. 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 <!doctype html> <html lang= "en" > <head> <meta charset= "utf-8" /> <script src= " http://ajax.googleapis.com/ajax/lib

Anil Singh | Code-sample.com

Search This Blog