01/Oct/2021 | 8 minutes to read
dotnet
Here is a List of essential Entity Framework Interview Questions and Answers for Freshers and mid level of Experienced Professionals. All answers for these Entity Framework questions are explained in a simple and easiest way. These basic, advanced and latest Entity Framework questions will help you to clear your next Job interview.
These interview questions are targeted for Entity Framework and LINQ. You must know the answers of these frequently asked Entity Framework interview questions to clear a .NET Developer interview. These Entity Framework and LINQ interview questions are based on real-time work.
1. What is the difference between EF6 and EF Core?
EF Core or Entity Framework Core is a object-database mapper designed for .NET whereas EF6 or Entity Framework 6 is
an object-relational mapper designed for .NET Framework but provides support for .NET Core.
EF Core offers good support for LINQ Queries, schema migrations, change tracking and updates. It works well with Azure Cosmos DB, PostgreSQL, SQL Server, Azure SQL Server,
MySQL and many more databases with the help of database provider plugin model. EF6 is a stable product but there is no further active development.
For more visit EF Core and EF6.
2. What are the Database providers in Entity framework?
Database Providers are the plug-in libraries which allow EF Core to access many databases such as Azure Cosmos DB, PostgreSQL etc. You can use most of the database providers using NuGet packages. A Database provider can extend the EF Core functionality unique to a specific database. For more visit EF Core Database Providers.
3. What is the DbContext in EF?
A DbContext instance can be defined as a session for a database which allows you to perform operations such as query, save etc on your entities. It is a union of Unit Of Work and Repository Design Pattern. For more visit DbContext.
4. How to inject DbContext in dependency injection for ASP.NET Core
ConfigureServices method of Startup class.
For example:
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
services.AddDbContext<ApplicationDbContext>
(
options => options.UseSqlServer("name=ConnectionStrings:DefaultConnection"));
} 5. What is the Unit Of Work responsible for when used with Entity Framework?
A Unit Of Work keeps track of everything your application is doing to perform a business rule that will affect the database. Once All the operations are completed
then it determines the changes that need to be made in the database.
When a Unit Of Work is used with EF it is responsible for:
SaveChanges() or SaveChangesAsync() to write the changes back to the database.6. What is the use of Attach and Ditach in Entity Framework?
6. Explain below methods in EF.
6. What is the use of Projection queries in Entity Framework?
6. What is the Database concurrency?
7. How to handle concurrency conflicts in Entity Framework?
8. What is concurrency token in Entity Framework?
10. What are the different relationship patterns in Entity framework?
11. What are the shadow and indexer properties in Entity framework?
12. Explain Indexes.
13. How does EF support Inheritance?
14. What are the Sequences in EF?
15. What are the Backing Fields in the entity framework?
16. What are the value converters?
17. Which latest version of Entity Framework should you consider?
EF Core is the latest version of Entity Framework that you should use for your application development. For more visit Entity Framework.
1. Differentiate IEnumerable Vs IQueryable In LINQ.
2. How to remove duplicates from a list using LINQ.
For more refer this - Remove Duplicates using LINQ.
1. How much will you rate yourself in Entity Framework?
When you attend an interview, Interviewer may ask you to rate yourself in a specific Technology like Entity Framework, So It's depend on your knowledge and work experience in Entity Framework. The interviewer expects a realistic self-evaluation aligned with your qualifications.
2. What challenges did you face while working on Entity Framework?
The challenges faced while working on Entity Framework projects are highly dependent on one's specific work experience and the technology involved. You should explain any relevant challenges you encountered related to Entity Framework during your previous projects.
3. What was your role in the last Project related to Entity Framework?
This question is commonly asked in interviews to understand your specific responsibilities and the functionalities you implemented using Entity Framework in your previous projects. Your answer should highlight your role, the tasks you were assigned, and the Entity Framework features or techniques you utilized to accomplish those tasks.
4. How much experience do you have in Entity Framework?
Here you can tell about your overall work experience on Entity Framework.
5. Have you done any Entity Framework Certification or Training?
Whether a candidate has completed any Entity Framework certification or training is optional. While certifications and training are not essential requirements, they can be advantageous to have.
We have covered some frequently asked Entity Framework Interview Questions and Answers to help you for your Interview. All these Essential Entity Framework Interview Questions are targeted for mid level of experienced Professionals and freshers.
While attending any Entity Framework Interview if you face any difficulty to answer any question please write to us at info@qfles.com. Our IT Expert team will find the best answer and will update on the portal. In case we find any new Entity Framework questions, we will update the same here.