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C#.NET Delegates, Events, and Collections

Computer Science

An overview of delegates, event handling, and various standard and generic collections in C#.NET.

Programming C# Data Structures

15 Questions Medium Ages 16+ Sep 7, 2026

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About this Study Set

This study set covers Computer Science through 15 practice questions. An overview of delegates, event handling, and various standard and generic collections in C#.NET. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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Browse all 15 questions from the C#.NET Delegates, Events, and Collections study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What is a delegate in .NET?

A A class that encapsulates a method
B A type that holds a reference to a method
C A database connection string
D A graphical interface component

2 What keyword is used to instantiate a delegate?

A init
B create
C new
D make

3 Which of the following is true about generic delegates?

A They are bound to a specific type
B They cannot reference methods
C They allow substitution of type placeholders
D They only support void methods

4 What is the primary difference between delegates and interfaces?

A Delegates have more implementation
B Interfaces are faster to execute
C Delegates can implement a method only once
D Delegates have no implementation, only declaration

5 What symbol is used to register a new subscription to an event?

A +=
B -=
C ==
D ++

6 Which collection represents a Last In, First Out (LIFO) structure?

A Queue
B ArrayList
C Stack
D Hashtable

7 Which collection represents a First In, First Out (FIFO) structure?

A Stack
B Queue
C SortedList
D Hashtable

8 What does a Hashtable store?

A Single values
B Key-value pairs
C Only integers
D Only strings

9 Which class combines the features of an ArrayList and a Hashtable?

A Queue
B Stack
C SortedList
D List<T>

10 What does the List<T> method 'IndexOf()' return if an element is not found?

A 0
B null
C false
D -1

11 In a Queue, which method adds an element to the end?

A Enqueue
B Push
C Add
D Insert

12 In a Stack, which method removes and returns the top element?

A Dequeue
B Pop
C Remove
D Clear

13 Which namespace contains the standard collections?

A System.Collections
B System.Data
C System.IO
D System.Collections.Generic

14 Which interface allows you to loop through elements in a collection?

A ICollection
B IDictionary
C IEnumerable
D IList

15 What is the purpose of generics in C#?

A To slow down execution
B To reuse code across different types
C To force all data to be strings
D To replace classes with methods

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