Quiz | Croma Campus

Which namespace is used for managing a collection of key/value pairs?

System.Collection.Generic.Dictionary
System.Collections.Specialized.NameValueCollection
System.Collections.Queue
System.Collections.Stack

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What is the base class for all exceptions in .NET?

System.Exception
System.ApplicationException
System.SystemException
System.Runtime.InteropServices.ExternalException

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Which of the following is a value type in .NET?

System.String
System.Collections.ArrayList
System.Int32
System.Object

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Which method is used to start a thread in C#?

Start()
Run()
Begin()
Initiate()

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What is the output of Console.WriteLine(10/3); in C#?

3
3.33
3
10-Mar

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Which of these is a valid statement to define a nullable type?

int? num
Nullable<int> num
Both
None

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Which of the following is NOT a .NET data provider?

SQL Server
OLE DB
XML
Oracle

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What is an extension method in C#?

A method that extends the size of an array
A method that adds new functionality to a type
A method that extends the life of a variable
A method that extends the scope of a variable

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Which of the following statements is true about interfaces in C#?

Interfaces can have fields
Interfaces can have method definitions
Interfaces can be instantiated
Interfaces can be implemented by classes

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What is the main advantage of using LINQ?

Better performance
Type safety
Code readability
All of the above

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Which of the following is true about an abstract class?

It can be instantiated
It cannot be inherited
It can contain abstract methods
It cannot contain non-abstract methods

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Which of the following is NOT a valid method to handle exceptions?

try
catch
final
finally

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How do you mark a method as asynchronous in C#?

Using the 'async' keyword
Using the 'await' keyword
Using the 'thread' keyword
Using the 'task' keyword

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What is LINQ?

Language Integrated Query
Local Integrated Query
Language Interface Query
Local Interface Query

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Which of these is not a valid C# data type?

short
long
byte
float64

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Which of the following is true about the 'sealed' keyword in C#?

It allows a class to be inherited
It prevents a class from being inherited
It allows a method to be overridden
It prevents a method from being overridden

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What is the main difference between 'String' and 'StringBuilder' in C#?

String is mutable
StringBuilder is immutable
StringBuilder is mutable
Both are immutable

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Which of the following is NOT a valid access modifier in C#?

public
protected internal
internal protected
private

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What is the purpose of the 'is' keyword in C#?

To check the type of an object
To cast an object to a different type
To compare two objects
To define a new type

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Which of the following classes is immutable?

String
StringBuilder
List
Dictionary

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How do you define a read-only property in C#?

public int MyProperty { get; }
public int MyProperty { get; set; }
public readonly int MyProperty { get; }
public int MyProperty { get { return _myProperty; } }

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What is the main advantage of using properties in C#?

Type safety
Performance
Encapsulation
None of the above

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What is the purpose of the 'virtual' keyword in C#?

To define a new method
To override a base class method
To allow a method to be overridden
To prevent a method from being overridden

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Which of these classes allows a collection to grow or shrink dynamically?

Array
LinkedList
List
ArrayList

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Which of the following is NOT a built-in delegate in C#?

Func
Action
Predicate
Transformer

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Which of the following is true about 'this' keyword in C#?

It refers to the current instance of a class
It refers to the base class
It is used to create a new instance
It is used to call a base class method

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What is the purpose of the 'base' keyword in C#?

To define a base class
To call a method in the base class
To create a new base class
To define an abstract class

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What is the main advantage of using delegates in C#?

Type safety
Performance
Code readability
None of the above

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Which of the following is true about 'const' keyword in C#?

The value can be changed at runtime
The value cannot be changed at runtime
It defines a method
It defines a variable that can be changed

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What is the extension of a .NET assembly?

.dll
.exe
Both
.com

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