In ADO.NET, the ___________ class is frequently used for advanced data binding scenarios.

  • DataReader
  • DataSet
  • DataView
  • SqlDataAdapter
The DataView class in ADO.NET is commonly employed for advanced data binding tasks. It allows for flexible sorting, filtering, and searching of data within a DataTable, making it suitable for various data presentation needs.

How can you update data in Entity Framework when using Code-First approach?

  • Execute raw SQL queries to update the database directly
  • Retrieve the entity, modify its properties, and call SaveChanges() on the context
  • Use the DbSet.Update() method to mark the entity as modified and save changes
  • Use the Entity Framework Designer to update the database schema
In the Code-First approach of Entity Framework, to update data, you retrieve the entity from the database, modify its properties, and then call the SaveChanges() method on the context to persist the changes to the database. The framework handles tracking changes and generating the necessary SQL statements to update the database.

Which of the following is true about ADO.NET Entity Framework?

  • It abstracts the database schema, enabling developers to work with conceptual entities
  • It is designed only for desktop applications
  • It is tightly coupled with SQL Server
  • It supports only stored procedures for data access
ADO.NET Entity Framework abstracts the database schema, allowing developers to interact with conceptual entities rather than dealing directly with database tables and columns. This abstraction simplifies data access and makes the application more maintainable and adaptable to changes in the underlying database structure.

What is the difference between Code-First and Database-First approaches in Entity Framework?

  • Code-First and Database-First approaches are identical in their approach to generating database schemas.
  • Code-First and Database-First approaches are interchangeable and can be used interchangeably in Entity Framework.
  • In Code-First, the application's data model is generated based on an existing database schema, whereas in Database-First, the database schema is generated based on the application's data model.
  • In Code-First, the database schema is generated based on the application's data model, whereas in Database-First, the application's data model is generated based on an existing database schema.
The primary difference between Code-First and Database-First approaches in Entity Framework lies in how the database schema and application's data model are created. In Code-First, developers define the application's data model using classes, and the database schema is then generated based on these classes. In contrast, Database-First starts with an existing database schema, from which Entity Framework generates the application's data model as classes. This fundamental distinction affects the development workflow and the way developers interact with the database during application development.

When modifying data in datasets, what does "CRUD" stand for?

  • Change, Retrieve, Update, Drop
  • Compile, Read, Upload, Delete
  • Copy, Remove, Update, Delete
  • Create, Read, Update, Delete
CRUD stands for Create, Read, Update, Delete. It represents the four basic functions of persistent storage, commonly used in database management systems. Create involves adding new records, Read involves retrieving existing records, Update involves modifying existing records, and Delete involves removing records from the dataset.

Which ADO.NET class is responsible for managing the connection pool?

  • SqlCommand
  • SqlConnection
  • SqlConnectionStringBuilder
  • SqlDataAdapter
The SqlConnection class in ADO.NET is responsible for managing the connection pool. It provides methods for opening, closing, and managing connections to a SQL Server database. When connection pooling is enabled, SqlConnection automatically manages the pooling of database connections, optimizing the performance of database interactions in .NET applications.

What is the difference between IEnumerable and IQueryable in LINQ?

  • IEnumerable allows for deferred execution of queries. IQueryable does not support deferred execution.
  • IEnumerable is for querying data from a database. IQueryable represents an in-memory collection of objects.
  • IEnumerable represents a collection of objects that you can iterate over. IQueryable is for querying data from a database.
  • IQueryable allows for composing LINQ queries on the server side and executing them remotely.
The main difference between IEnumerable and IQueryable in LINQ lies in their execution behavior. IEnumerable is suitable for querying in-memory collections where execution happens on the client side. IQueryable, on the other hand, is used for querying databases where execution occurs on the server side. IQueryable allows for composing LINQ queries and executing them remotely, while IEnumerable supports deferred execution but lacks this remote execution capability.

Advanced data binding techniques often involve using ___________ to transform data before displaying it.

  • Data Adapters
  • Data Converters
  • Data Providers
  • Data Transformers
Advanced data binding in ADO.NET often requires using data transformers to manipulate data before displaying it. These transformers can perform operations like formatting, filtering, or aggregating data to suit the presentation requirements.

Proper error handling in ADO.NET transactions often involves using ___________ blocks to handle exceptions.

  • for-loop
  • if-else
  • switch-case
  • try-catch
Proper error handling in ADO.NET transactions often involves using try-catch blocks to handle exceptions. A try-catch block allows developers to handle exceptions gracefully by catching and handling errors that may occur during transaction processing, ensuring robustness and reliability in application behavior.

DataAdapters are database-agnostic, allowing you to work with various database providers such as SQL Server, Oracle, and ___________.

  • DB2
  • MySQL
  • PostgreSQL
  • SQLite
DataAdapters are database-agnostic, meaning they can work with various database providers without requiring changes to the application code. This flexibility allows developers to switch between different database systems such as SQL Server, Oracle, and SQLite seamlessly, simply by changing connection strings or configurations.