From 0 to 1 Data Structures & Algorithms in Java - Graph Using An Adjacency List And Adjacency Set

The video tutorial covers three main graph representations: adjacency matrix, adjacency list, and adjacency set. It explains the structure and use cases of each representation, focusing on the adjacency list and its implementation in Java. The tutorial also discusses the differences between directed and undirected graphs, the limitations of adjacency lists, and the advantages of using adjacency sets. Java code examples are provided to illustrate the implementation of these graph representations.

What is the primary component of a node in an adjacency list representation?

• A unique string identifier

• A set of all graph nodes

• A matrix of connections

• A linked list of adjacent nodes

What is a key feature of the adjacency list representation?

• It uses a matrix for connections

• Each node has a linked list of adjacent nodes

• It is only used for undirected graphs

• It does not require unique identifiers

In an undirected graph, how are connections represented in an adjacency list?

• Connections are not represented

• Connections are bidirectional

• Only the first node is listed

• Only one direction is represented

How are vertices stored in an adjacency list for a graph?

• As a queue

• As a list of nodes

• As a set

• As a matrix

Which Java data structure can be used to implement adjacency lists?

• Array

• Stack

• HashMap

• LinkedList

What is a major downside of using adjacency lists?

• Vertex order does not matter

• They are too fast

• Vertex order affects representation

• They are difficult to visualize

What must be done when deleting a vertex in an adjacency list?

• Only remove it from the main list

• Remove it from all adjacency lists

• Convert it to a matrix

• Nothing, it is automatic

How does an adjacency set differ from an adjacency list?

• It uses a queue instead of a list

• It uses a stack instead of a list

• It uses a set instead of a list

• It uses a matrix instead of a list

What is the advantage of using an adjacency set over an adjacency list?

• Faster iteration and search

• More memory usage

• Better for undirected graphs

• Simpler to implement

In Java, what does the adjacency set hold for each node?

• Adjacent vertices

• All nodes in the graph

• Only the node itself

• A matrix of connections