ASP.NET Interview Questions and Answers (1544) - Page 51

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You are designing an ASP.NET web application that allows members of the Administrators role to edit content by using a HyperLink control on each page named EditHyper Link. You do not want nonadministrators to discover the location of the administration pages. Which approach should you recommend ?

NOTE: This is objective type question, Please click question title for correct answer.

You are designing an ASP.NET web application that provisions virtual machines for a testing environment. Users can provision from 1 to 10 virtual machines at a time, and each virtual machine provision might take up to 60 seconds. For security reasons, the Server hosting the virtual machines allows provisioning requests only from the web server. You need to design the application to keep users notified of the provisioning Progress. Which approach should you recommend ?

NOTE: This is objective type question, Please click question title for correct answer.

You are creating a new website for an enterprise organization. The enterprise has a quality assurance team that requires developers to use TDD(Test driven development). Additionally, the application architecture must partition according to the principle of SoC. Which template should you use

NOTE: This is objective type question, Please click question title for correct answer.

State a simple difference between a Skin and a Theme ?

Skin :-
Skin is a file that defines the visual appearance of a particular control. we can create a Skin file for the GridView control that defines the look of the GridView for different SkinIDs.

Theme :-
Theme is a collection of Skins.

Thanks and Regards
Akiii

What is the main role of Entity Client Data Provider ?

The main role of the Entity Client Data Provider is to convert Entity SQL queries into SQL query which is understood by underlying database.

It communicates with ADO.Net data provider which in turn sends or retrieves data from the database.

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Akiii

What are the 3 things that are contained in EDM (Entity Data Model) ?

Conceptual Model: Conceptual model is your model classes and their relationships. All the tables in the database are mapped into entities here.

Storage Model: Storage model is your database design model which includes tables, views, stored procedures and their relationships and keys.

Mapping: Mapping consist information about how your conceptual model is mapped to storage model like nvarchar type is mapped into string type in the conceptual model.

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Akiii

Briefly describe the ObjectContext class ?

ObjectContext class represents EntityContainer which you can see from XML view of Model1.edmx or from EDM property window. You can call this as context class.

This is the primary class for interacting with entity objects and database. An instance/object of the ObjectContext class encapsulates the connection to the database, metadata that describes the model, and an ObjectStateManager object that tracks objects during create, update, and delete operations.

With the help of this class you can access all the tables and columns in the underlying database.

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Akiii

What is a Scalar and Navigation property in Entity framework ?

Scalar property are properties whose actual values are contained in the entity. A property of an entity that maps to a single field in the storage model.
E.g. Student entity has scalar properties e.g. StudentId, StudentName. These correspond with the Student table columns.

Navigation property is used to navigate through relations in data. It allows you to navigate from one entity to a "connected" entity.
E.g. if a user is connected to a role, you can use the "Role" navigation to read and inspect the role associated with that user. Basically it is equivalent to a foreign key relationship in a database.

Thanks and Regards
Akiii

What do you mean by Code First Approach in Entity Framework ?

In Code First approach you write your POCO classes first and then create database from these POCO classes.

Developers who follow the path of Domain-Driven Design (DDD) principles prefer to begin by coding their classes first and then generating the database required to persist their data in it.

In Code First approach, you avoid working with visual model designer (EDMX) completely.

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Akiii

What is mean by Model First development in Entity Framework ?

In Model First approach, you first create Entities, relationships, and inheritance hierarchies directly on the design surface of EDMX.

You have to select 'Empty model' when you add ADO.NET Entity Data Model in the project.

By this, we generate a DDL and we execute this DDL against the database to create the tables and associations/relations from the EDMX file.

Thanks and Regards
Akiii