H2. Collections and Generics

Collections

What is a group of objects that provides a standard set of types for storing and managing collections of objects?

Collections

Which contains lists, linked lists, dictionaries, and arrays to manage collections of objects?

1. Standard Collections

2. Generic Collections

What are the two types of collections?

Standard Collections

Which are found in the System.Collections namespace?

Generic Collections

Which are found in the System.Collections.Generic namespace?

1. ArrayList

2. Hashtable

3. SortedList

4. Stack

5. Queue

What are Classes of the System.Collections Namespace?

ArrayList

Which collection class is known for an ordered collection of objects?

ArrayList

Which is not the same as an array that is static in size?

ArrayList

Which is known as dynamic since items can be added and removed from the specified index location?

Hashtable

Which class stores key or value pairs where the key represents the value in the collection?

Hashtable

When accessing the values in […], the key must be specified.

SortedList

Which class is a combination of ArrayList and Hashtable?

SortedList

Which class stores key or value pairs where the key values sort values?

SortedList

To access the values in […], the key or index value must be specified.

1. Capacity

2. Count

3. Item

4. Key

5. Values

What are some properties that can be used in SortedList?

Capacity

Which property gets or sets the capacity of SortedList?

Count

Which property gets the count of the number of elements in SortedList?

Item

Which property gets and sets the value associated with a specific key in the SortedList?

Keys

Which property carry the keys in the SortedList?

Values

Which property carry the values in the SortedList?

1. void Clear()

2. void Add(object key, object value)

3. void Remove(object key)

4. void RemoveAt(int index)

5. bool ContainsKey(object key)

6. bool ContainsValue(object value)

7. object GetByIndex(int index)

8. object GetKey(int index)

What are some methods that are used in SortedList?

void Clear()

Which method is used to remove all the items in the SortedList?

void Add(object key, object value)

Which method adds an item with the specified key and value into the SortedList?

void Remove(object key)

In the SortedList, a key that is specified will remove its element.

void RemoveAt(int index)

It is an index that is specified will remove its element in the SortedList.

bool ContainsKey(object key)

If the SortedList contains specified key, then it will return the Boolean value true.

bool ContainsValue(object value)

If the SortedList contains specified value, then it will return the Boolean value true.

object GetByIndex(int index)

Which method returns the value of the specified index in SortedList?

object GetKey(int index)

Which method returns the key of the specified index in the SortedList?

Stack

Which class represents a Last In, First Out (LIFO) collection of objects?

push and pop

When inserting and removing objects from the stack, it uses […] and […] operations.

Queue

Which class represents a First In, First Out (FIFO) collection of objects?

enqueue and dequeue

Adding and removing objects from the queue class uses an […] and […] operations.

1. IEnumerable

2. ICollection

3. IDictionary

What are the Interfaces in the System.Collections Namespace?

IEnumerable

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

ICollection

Which interface allows you to determine the number of elements in a collections and copy them in a simple array type?

IDictionary

Which interface provides a list of elements that are accessible via a key or value rather than an index?

Generics

What makes the code reusable across different types by creating a template that contains placeholder types?

Generics

What allows specifying the data types of the programming elements when they are actually used in the program?

System.Collection.Generics namespace

Which contains several generic collection classes?

Generics

When using […], it allows creating collections like linked lists, hashtables, stacks and queues that operate on an item of any data type?

1. List<T>

2. Queue<T>

3. Stack<T>

What are the generic collections found in System.Collections.Generic namespace?

List<T>

Which is a generic collection that provides an efficient and dynamically allocated array—also commonly used to store a list of duplicate objects?