150+ C# Programming Solved MCQs

These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Computer Science Engineering (CSE) , Information Technology Engineering (IT) , Master of Computer Applications (MCA) , Programming Languages .

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101.	The reason that C# does not support multiple inheritances is because of ______.
A.	Method collision
B.	Name collision
C.	Function collision
D.	Interface collision
Answer» B. Name collision

102.	_______ is a set of devices through which a user communicates with a system using interactive set of commands.
A.	Console
B.	System
C.	Keyboard
D.	Monitor
Answer» A. Console

103.	Exponential formatting character (‘E’ or ‘e’) converts a given value to string in the form of _______.
A.	m.dddd
B.	E+xxx
C.	m.dddd
D.	E+xxx
Answer» A. m.dddd

104.	The ______ are the Graphical User Interface (GUI) components created for web based interactions..
A.	Web forms
B.	Window Forms
C.	Application Forms
D.	None of the above
Answer» B. Window Forms

105.	In Microsoft Visual Studio, ______ technology and a programming language such as C# is used to create a Web based application.
A.	JAVA
B.	J#
C.	VB.NET
D.	ASP.NET
Answer» D. ASP.NET

106.	The controls available in the tool box of the ______ are used to create the user interface of a web based application.
A.	Microsoft visual studio IDE
B.	Application window
C.	Web forms
D.	None of the above
Answer» A. Microsoft visual studio IDE

107.	Web Forms consists of a _______ and a _________ .
A.	Template, Component
B.	CLR, CTS
C.	HTML Forms, Web services
D.	Windows, desktop
Answer» A. Template, Component

108.	The ______ parentheses that follow _____ indicate that no information is passed to Main().
A.	Empty, class
B.	Empty, submain
C.	Empty, Main
D.	Empty, Namespace
Answer» C. Empty, Main

109.	The scope of a variable depends on the ____________ and _________.
A.	Main method, place of its declaration
B.	Type of the variable, console
C.	compiler, main
D.	Type of the variable, place of its declaration
Answer» B. Type of the variable, console

110.	Which of the following statements is correct about the C#.NET code snippet given below? class Student s1, s2; // Here 'Student' is a user-defined class. s1 = new Student(); s2 = new Student();
A.	Contents of s1 and s2 will be exactly same.
B.	The two objects will get created on the stack.
C.	Contents of the two objects created will be exactly same.
D.	The two objects will always be created in adjacent memory locations.
Answer» C. Contents of the two objects created will be exactly same.

111.	Which of the following can be facilitated by the Inheritance mechanism? 1 Use the existing functionality of base class. 2 Overrride the existing functionality of base class. 3 Implement new functionality in the derived class. 4 Implement polymorphic behaviour. 5 Implement containership.
A.	1, 2, 3
B.	3, 4
C.	2, 4, 5
D.	3, 5
Answer» A. 1, 2, 3

112.	Which of the following should be used to implement a 'Has a' relationship between two entities?
A.	Polymorphism
B.	Templates
C.	Containership
D.	Encapsulation
Answer» C. Containership

113.	Which of the following should be used to implement a 'Like a' or a 'Kind of' relationship between two entities?
A.	Polymorphism
B.	Containership
C.	Templates
D.	Inheritance
Answer» D. Inheritance

114.	How can you prevent inheritance from a class in C#.NET ?
A.	Declare the class as shadows.
B.	Declare the class as overloads.
C.	Declare the class as seal
Answer» C. Declare the class as seal

115.	A class implements two interfaces each containing three methods. The class contains no instance data. Which of the following correctly indicate the size of the object created from this class?
A.	12 bytes
B.	24 bytes
C.	0 byte
D.	8 bytes
Answer» B. 24 bytes

116.	Which of the following statements is correct about Interfaces used in C#.NET?
A.	All interfaces are derived from an Object class.
B.	Interfaces can be inherited.
C.	All interfaces are derived from an Object interface.
D.	Interfaces can contain only method declaration.
Answer» B. Interfaces can be inherited.

117.	Which of the following statements is correct about an interface used in C#.NET?
A.	If a class implements an interface partially, then it should be an abstract class.
B.	Class cannot implement an interface partially.
C.	An interface can contain static methods.
D.	An interface can contain static data.
Answer» A. If a class implements an interface partially, then it should be an abstract class.

118.	Which of the following statements is correct about an interface?
A.	One interface can be implemented in another interface.
B.	An interface can be implemented by multiple classes in the same program.
C.	A class that implements an interface can explicitly implement members of that interface.
D.	The functions declared in an interface have a body.
Answer» C. A class that implements an interface can explicitly implement members of that interface.

119.	Databases store information in records, fields and:
A.	data providers
B.	grids
C.	columns
D.	tables
Answer» D. tables

120.	Each data provider class is grouped and accessible through its:
A.	namespace
B.	database
C.	datagrid
D.	provider
Answer» A. namespace

121.	In Visual Studio, the tool that enables you to connect to a database and automatically populate a dataset object using a TableAdapter object is the ___________wizard:
A.	Data Source Configuration
B.	Data Source
C.	Query Builder
D.	DataSet Designer
Answer» A. Data Source Configuration

122.	In XML, a document is a hierarchy of
A.	attributes
B.	elements
C.	tags
D.	All of the above
Answer» B. elements

123.	Which of the following namespace contains the LINQ to XML?
A.	System.Xml;
B.	System.Data;
C.	System.Xml.Linq;
D.	System.Linq;
Answer» C. System.Xml.Linq;

124.	LINQ to SQL works with
A.	SQL Server
B.	SQL Server Compact 3.5
C.	Both (a) and (b)
D.	None of the above
Answer» C. Both (a) and (b)

125.	A connection string contains
A.	a using directive
B.	the name of the data source
C.	the version number of database management system
D.	the list of fields in the database
Answer» B. the name of the data source

150+ C# Programming Solved MCQs

The reason that C# does not support multiple inheritances is because of ______.

_______ is a set of devices through which a user communicates with a system using interactive set of commands.

Exponential formatting character (‘E’ or ‘e’) converts a given value to string in the form of _______.

The ______ are the Graphical User Interface (GUI) components created for web based interactions..

In Microsoft Visual Studio, ______ technology and a programming language such as C# is used to create a Web based application.

The controls available in the tool box of the ______ are used to create the user interface of a web based application.

Web Forms consists of a _______ and a _________ .

The ______ parentheses that follow _____ indicate that no information is passed to Main().

The scope of a variable depends on the ____________ and _________.

Which of the following statements is correct about the C#.NET code snippet given below? class Student s1, s2; // Here 'Student' is a user-defined class. s1 = new Student(); s2 = new Student();

Which of the following can be facilitated by the Inheritance mechanism? 1 Use the existing functionality of base class. 2 Overrride the existing functionality of base class. 3 Implement new functionality in the derived class. 4 Implement polymorphic behaviour. 5 Implement containership.

Which of the following should be used to implement a 'Has a' relationship between two entities?

Which of the following should be used to implement a 'Like a' or a 'Kind of' relationship between two entities?

How can you prevent inheritance from a class in C#.NET ?

A class implements two interfaces each containing three methods. The class contains no instance data. Which of the following correctly indicate the size of the object created from this class?

Which of the following statements is correct about Interfaces used in C#.NET?

Which of the following statements is correct about an interface used in C#.NET?

Which of the following statements is correct about an interface?

Databases store information in records, fields and:

Each data provider class is grouped and accessible through its:

In Visual Studio, the tool that enables you to connect to a database and automatically populate a dataset object using a TableAdapter object is the ___________wizard:

In XML, a document is a hierarchy of

Which of the following namespace contains the LINQ to XML?

LINQ to SQL works with

A connection string contains

To avoid writing additional SQL statements to update a live database, you instantiate an object of which class?

The following namespaces (System.Data.OleDB, System.Data.SqlClient, System.Data.Odbc, System.Data.OracleClient) include classes for different:

Which of the following is a definition of a database?

A computer application for managing databases and pulling together data to generate reports and make decisions is known as a(n)

Which of the following characterizes the relational model for databases?

A field is a

Forms and reports, used for entering and editing records, and for generating useful information in reports are

A computer application that manages a database, in which different kinds of data are stored in separate tables, is known as a

Which of the following are examples of relational database management systems?

A unique field which distinguishs a record is known as a

In a database, a parent-child relationship is also known as a

The field in the child table that links information to the parent table is known as the

ADO.NET is the data access component of Microsoft’s .NET framework that enables you to

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:

Web Forms consists of a _ and a ___ .

The __ parentheses that follow _ indicate that no information is passed to Main().

The scope of a variable depends on the ____ and _.

Which of the following statements is correct about the C#.NET code snippet given below?
class Student s1, s2; // Here 'Student' is a user-defined
class. s1 = new Student();
s2 = new Student();

Which of the following can be facilitated by the Inheritance mechanism?
1 Use the existing functionality of base class.
2 Overrride the existing functionality of base class.
3 Implement new functionality in the derived class.
4 Implement polymorphic behaviour.
5 Implement containership.

126.	To avoid writing additional SQL statements to update a live database, you instantiate an object of which class?
A.	DataAdapter
B.	DataReader
C.	DataSet
D.	CommandBuilder
Answer» A. DataAdapter

127.	The following namespaces (System.Data.OleDB, System.Data.SqlClient, System.Data.Odbc, System.Data.OracleClient) include classes for different:
A.	Data providers
B.	File streams
C.	ADO.NET applications
D.	Databases
Answer» A. Data providers

128.	Which of the following is a definition of a database?
A.	It is a collection of related information organized on a computer.
B.	It is single flat file.
C.	It is a file that can only be set up on a single PC.
D.	It is a group of files that can be set up only on a network.
Answer» A. It is a collection of related information organized on a computer.

129.	A computer application for managing databases and pulling together data to generate reports and make decisions is known as a(n)
A.	Database System (DS).
B.	File Manager (FM).
C.	Management System (MS).
D.	Database Management System (DBMS).
Answer» D. Database Management System (DBMS).

130.	Which of the following characterizes the relational model for databases?
A.	It organizes data into a hierarchal format.
B.	It splits data into separate row and column areas called tables.
C.	It organizes data into one large table.
D.	It organizes data into a network format.
Answer» B. It splits data into separate row and column areas called tables.

131.	A field is a
A.	group of records.
B.	index that locates information in a table.
C.	common characteristic in a table of information.
D.	code that represents a record.
Answer» C. common characteristic in a table of information.

132.	Forms and reports, used for entering and editing records, and for generating useful information in reports are
A.	additional database objects.
B.	only useful for complex databases.
C.	difficult to generate.
D.	stored separately from databases.
Answer» D. stored separately from databases.

133.	A computer application that manages a database, in which different kinds of data are stored in separate tables, is known as a
A.	Normal database system.
B.	Network database system.
C.	Standalone database system.
D.	Relational database management system.
Answer» D. Relational database management system.

134.	Which of the following are examples of relational database management systems?
A.	Adobe Publisher and Autocad
B.	Delphi and Turbo C++
C.	Microsoft Excel and Microsoft Project
D.	Microsoft Access and SQL 2000
Answer» D. Microsoft Access and SQL 2000

135.	A unique field which distinguishs a record is known as a
A.	Foreign key.
B.	Primary key.
C.	Tertiary key.
D.	Secondary key.
Answer» D. Secondary key.