Question 1

ADO.NET was created for
A)Multiple users.
B)Single users.
C)Home network users.
D)Limited users.

Accepted Answer

ADO.NET was designed to support multiple users, allowing for scalable, distributed applications that can handle numerous concurrent database connections and operations.

Question 2

Which of the following statements characterizes the relationship between a Visual Basic.NET program and a database record?
A)They are connected.
B)External databases cannot be accessed by Visual Basic.NET.
C)They are connected as long as the program is running.
D)They are not connected.

Accepted Answer

Visual Basic.NET can connect to external databases while the program is running, allowing it to access and manipulate database records.

Question 3

A copy of a database is called a
A)Duplicate database.
B)Dataset.
C)Table.
D)Database copy.

Accepted Answer

The answer of A copy of a database is called...

Question 4

When is the dataset connected to the database?
A)Whenever the program makes changes to a field or record
B)They are always connected
C)They are always disconnected
D)Whenever the program is running

Accepted Answer

The dataset is connected to the database whenever the program makes changes to a field or record, as it needs to update the database with the new information.

Question 5

The connection to the database is established by
A)Using a local area network.
B)Installing a special software package.
C)Using managed providers.
D)Using a wide area network.

Accepted Answer

Managed providers are used to establish connections to databases by providing the necessary interfaces and protocols.

Question 6

The ADO.NET disconnected dataset
A)Provides a flexible way of working with database records.
B)Makes working with databases very complex.
C)Requires a large amount of memory space.
D)Is required when single users want to access a database.

Accepted Answer

The ADO.NET disconnected dataset is designed to provide a flexible way of working with database records, allowing for operations on data without requiring a constant connection to the database. This flexibility is a key feature, making it easier to work with data in various scenarios.

Question 7

XML provides a(n)
A)Difficult format for data storage.
B)Numeric based code for data storage.
C)Consistent format for data across applications, networks, and the Internet.
D)Limited format for data storage.

Accepted Answer

XML offers a consistent format for data storage and exchange across different applications, networks, and the Internet, making it easier to share data among disparate systems.

Question 8

Why does Visual Studio.NET use XML as a data storage technology?
A)XML works best for the single PC user.
B)XML restricts the number of applications that can interface with Visual Basic.NET.
C)XML is optimized for sharing data across the Internet.
D)XML is easier to understand than Visual Basic.NET.

Accepted Answer

XML is designed to facilitate the sharing of data across different systems, particularly via the Internet, making it an ideal choice for applications that need to communicate or share data online.

Question 9

Choose the correct statements about the LINQ?
A)The main concept behind the linq is query
B)linq make use of for loop to execute the query
C)It is not required that linq should make use of IEnumerable interface
D)None of the mentioned

Accepted Answer

The main concept behind LINQ (Language Integrated Query) is indeed the ability to write queries to efficiently manage data, regardless of the data source. LINQ queries can be applied to arrays, enumerable classes, XML, datasets, and more, making it a versatile tool for data manipulation and retrieval.

Question 10

Choose the namespace in which the interface IEnumerable is declared?
A)System.Collections
B)System.Collections.Generic
C)Both a & b
D)None of the mentioned

Accepted Answer

The interface IEnumerable is declared in the System.Collections namespace.

Question 11

Can we use linq to query against a DataTable?
A)Yes
B)No
C)Situational
D)None of the mentioned

Accepted Answer

LINQ can be used to query against a DataTable in C#. This is achieved through the AsEnumerable() extension method which allows LINQ queries to be performed on the rows of the DataTable.

Question 12

Select the namespace which should be included while making use of LINQ operations:
A)System.Text
B)System.Collections.Generic
C)System.Linq
D)None of the mentioned

Accepted Answer

The namespace required for LINQ operations is System.Linq. This namespace contains classes and interfaces that support queries that use Language-Integrated Query (LINQ).

Question 13

What is meant by the term generics?
A)parameterized types
B)class
C)structure
D)interface

Accepted Answer

Generics refer to parameterized types, allowing for the creation of classes, interfaces, and methods with placeholders for one or more types. These placeholders can be filled with specific types by the user, providing type safety and reducing code duplication.

Question 14

Are generics in C# are same as the generics in java and templates in C++?
A)Yes
B)No
C)May be
D)None of the mentioned

Accepted Answer

Generics in C#, generics in Java, and templates in C++ are all mechanisms for creating generic code that can work with different types of data.

Question 15

Choose the advantages of using generics?
A)Generics facilitate type safety
B)Generics facilitate improved performance and reduced code
C)Generics promote the usage of parameterized types
D)All of the mentioned

Accepted Answer

Generics offer several advantages, including type safety by ensuring that you work with a specific type of object, improved performance and reduced code by allowing the same code to be used with different types, and the promotion of parameterized types, which makes code more adaptable and easier to work with.

Question 16

Which among the given classes present in System.Collection.Generic.namespace?
A)Stack
B)Tree
C)Sorted Array
D)All of the mentioned

Accepted Answer

Stack is a class present in the System.Collections.Generic namespace, which provides a generic collection that supports a simple last-in-first-out (LIFO) semantics for adding and removing items. Tree and Sorted Array are not generic collection types provided by the System.Collections.Generic namespace.

Question 17

Which feature enables to obtain information about use and capabilities of types at runtime?
A)Runtime type ID
B)Reflection
C)Attributes
D)None of the mentioned

Accepted Answer

Reflection is the feature that enables a program to inspect and manipulate its own structure and behavior at runtime. This includes obtaining information about types, their members, attributes, and also creating instances of types, invoking methods, and accessing fields dynamically.

Question 18

Choose the namespace which consists of classes that are part of .NET Reflection API:
A)System.Text
B)System.Name
C)System.Reflection
D)None of the mentioned

Accepted Answer

The .NET Reflection API, which allows for examining and manipulating the types at runtime, is contained within the System.Reflection namespace.

Quiz 4: C Programming: Database and ADO.NET

ADO.NET was created for

Which of the following statements characterizes the relationship between a Visual Basic.NET program and a database record?

A copy of a database is called a

When is the dataset connected to the database?

The connection to the database is established by

The ADO.NET disconnected dataset

XML provides a(n)

Why does Visual Studio.NET use XML as a data storage technology?

Choose the correct statements about the LINQ?

Choose the namespace in which the interface IEnumerable is declared?

Can we use linq to query against a DataTable?

Select the namespace which should be included while making use of LINQ operations:

What is meant by the term generics?

Are generics in C# are same as the generics in java and templates in C++?

Choose the advantages of using generics?

Which among the given classes present in System.Collection.Generic.namespace?

Which feature enables to obtain information about use and capabilities of types at runtime?

Choose the namespace which consists of classes that are part of .NET Reflection API: