Events and Lambda Expressions C#

Events and Lambda Expressions C#

University

20 Qs

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Events and Lambda Expressions C#

Events and Lambda Expressions C#

Assessment

Quiz

Computers

University

Practice Problem

Easy

Created by

Long Trần

Used 10+ times

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20 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is an event in C#?

A method that is automatically called

A type of variable that can hold multiple data types

A way for a class to notify other classes when something of interest happens

A method that modifies an object

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which keyword is used to declare an event in C#?

delegate

event

public

handler

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a delegate in the context of C# events?

A type that defines the signature of a method that can be called when an event is raised

A collection that stores event listeners

A method used to handle exceptions

A class that raises an event

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you subscribe a method to an event in C#?

Using the `=` operator

Using the `+=` operator

Using the `->` operator

Using the `++` operator

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a valid event declaration in C#?

public event void MyEvent();

public event EventHandler MyEvent;

public delegate void MyEvent;

public event MyHandler MyEvent()

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main purpose of using events in C#?

To allow methods to return multiple values

To provide a mechanism for communication between objects when something of interest happens

To store a list of functions

To handle multithreading

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens if an event has no subscribers when it is raised?

It causes an error

The event is ignored

A default handler is called

The application crashes

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