ado.net entity framework interview questions

We had compiled most frequently asked entity framework interview questions and answers for freshers and experienced dot net developers on Entity framework basics, architecture, Data Model, Client Data Provider, DB Context, difference between framework, LINQ & SQL etc.

Entity Framework is an ORM from Microsoft that will enable the developers to work with domain specific objects, which eliminates the extra code being written in the data access layer.

.edmx file is a XML file and it has Conceptual Model, Storage Model and Mapping details i.e,

Conceptual Models are the model classes which contain the relationships. These are independent of the database design.

Storage Models are our database design models, which contains database tables, views, stored procs and keys with relationships.

The Mapping will have the information on how the Conceptual Models are mapped to Storage Models.

LINQ to Entities is a query language which we used to write queries against the object models and the query result will return the entities defined in the Conceptual Model.

Entity SQL is a query language is like LINQ to Entities. This is a bit complex compared to LINQ to Entities. A developer who is using this should learn this separately.

Responsibility of Entity Client Data Provider is to convert the LINQ to Entities or Entity SQL queries to a SQL query, which is understood by the underlying database. This finally communicates with ADO.NET Data Provider which in turn used to talk to the database.

We will get this option while adding an edmx file. On selecting this option Entity Framework will adhere to Singular or Plural coding conventions.

When we create a edmx file, it will have the list of entities and context class which will be derived from DB Context class. Page 1 of 3

I hope these questions and answers will help you to crack your Entity Framework Interview. These interview Questions have been taken from our new released eBook Entity Framework 6.x Questions and Answers. This book contains more than 110 Entity Framework interview questions.

This eBook has been written to make you confident in Entity Framework with a solid foundation. Also, this will help you to turn your programming into your profession. Its would be equally helpful in your real projects or to crack your Entity Framework Interview.

ADO.NET Entity Framework is an open source ORM framework that allows you to query the database in an object-oriented fashion. It works with .NET based application and internally wraps ADO.NET. This article contains most commonly asked interview questions and answers for Entity Framework.

13) What is the namespace used to include .NET Data provider for SQL server in .NET code?

The main advantage of using Entity Framework or EF is that it generates code automatically for the Model (Middle Layer), Mapping code and Data Access Layer. It reduces a lot of time during the development process.

.edmx file is an XML file, which declares a conceptual model, a storage model and the mapping between these models. This file also consists the information that is used by ADO.NET entity data model designer to render a model graphically. It consists of all the mapping details of how object maps with SQL tables. It is divided into three categories SSDL, CSDL, and MSL.

T4 entity is important in Entity framework as it is the heart of entity framework code generation. It reads the EDMX XML file and generate C# behind code.

In ADO.NET data-adapter class fetch data from the database, stores data in a dataset and reflects the changes made in the dataset to the database. For all type of communication, data-adapter act as an intermediary. Using the Fill() method, data-adapter fills data to a Data-table.

Dapper is a microframework for a simple object mapper that maps the output of the native query to a domain or a c# class. Dapper is a high-performance system for data access that is built by StackOverflow and is released as an open-source. It is very easy to fire a query in SQL against the database and to map the result into the C# domain class.

The Model First Approach offers the choice of creating relationships and entities directly on the developing interface off the EDMX and later one can execute it. It is a better natural approach to operate in comparison to the Database First Approach specifically during the development of the movement of data in the starting phases of any new project. Utilizing it a designer may initiate operating with the Model of the Database and creation of entities that yield logical sense inapt regarding their process of being stored in the Database concerning the tables.

The Dbcontext class happens to be an essential fragment of the Entity Framework. Dbcontext API in maximum cases selects or chooses to simplify ones communication with Entity Framework. It lowers the quantity of procedures and attributes that one requires to access frequently utilized tasks. Dbcontext also handles the entity articles throughout run time including occupying items with data from databases and change tracking.

EDM or the Entity Data Model happens to be an expanded style of the Entity-relationship prototype which states the fundamental prototype of the data utilizing several modeling procedures. It also depicts a set of fundamentals that explains data formation disregarding its collected form. EDM is hence the connection between the database and the prototype.

ADO.Net: ADO.Net happens to be ORM but it creates an elevated abstract object prototype over ADO.Net components. ADO.Net functions on disjunction architecture. Data happens to hold as XML. ADO.Net is extremely swift and data may be collected in data sets. ADO.Net also abstracts esoteric programming which is necessary for accessing a database.

Here is the complete list of essential questions that can be asked to the professionals by interviewers in the interview for the Entity Framework profile.

The choice of the development approach depends on the project. If the database is present, then it is best to go with the Database First approach. If model classes and database are not present, the Model First is the most suitable. If the developer has domain classes, the Code First approach is the best choice.

FAQ

What is difference between ADO.NET and Entity Framework?

Entity framework is ORM Model, which used LINQ to access database, and code is autogenerated whereas Ado.net code is larger than Entity Framework. Ado.net is faster than Entity Framework. 1. ADO.Net is create bunch of data layer code, EF is not create.

What is Entity Framework core interview questions?

Top 20 Entity Framework Interview Questions & Answers
  • What is ADO.NET Entity Framework? …
  • What other O/RMs you can use with . …
  • What is Micro O/RMs? …
  • What is Dapper? …
  • What is SQL injection attack? …
  • How to handle SQL injection attacks in Entity Framework? …
  • What are various approaches to domain modeling in Entity Framework?

What is Entity Framework in ASP NET MVC interview questions?

Entity Framework (EF), a Microsoft-supported open-source ORM (Object-Relational Mapper) for . NET applications, is a set of utilities and mechanisms that works towards optimizing data-driven applications. This is considered one of the most important concepts in the MVC model.

What is the difference between Entity Framework and LINQ to SQL?

LINQ to SQL allow you to query and modify SQL Server database by using LINQ syntax. Entity framework is a great ORM shipped by Microsoft which allow you to query and modify RDBMS like SQL Server, Oracle, DB2 and MySQL etc.

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