Modern JavaScript from the Beginning - Second Edition - Linked Lists

The video tutorial explains the concept of linked lists, a data structure consisting of nodes that point to the next node, forming a chain. It covers the creation of a Node class and a LinkedList class, detailing methods for inserting, removing, and accessing nodes. The tutorial includes testing and debugging of these methods, emphasizing the importance of understanding linked list operations for programming interviews. The video concludes with a summary of the key points discussed.

What is the primary difference between a linked list and an array?

• Linked lists store elements in contiguous memory locations.

• Arrays can only store numbers.

• Arrays have pointers to the next element.

• Linked lists use nodes with pointers to the next node.

In a linked list, what is the term used for the last node?

• Leaf

• Root

• Tail

• Head

What is the purpose of the Node class in a linked list?

• To sort the nodes in the list

• To manage the entire linked list

• To represent each node with a value and a pointer

• To store a collection of nodes

Which method would you use to add a node to the beginning of a linked list?

• insertAt

• insertLast

• insertFirst

• removeAt

What does the insertLast method do in a linked list?

• Clears the entire list

• Adds a node at the beginning

• Adds a node at the end

• Removes the last node

How can you print all the values in a linked list?

• By converting the list to an array

• Using the clearList method

• By accessing each node directly

• Using the printListData method

What is the function of the insertAt method?

• To clear the list

• To remove a node from a specific index

• To insert a node at a specific index

• To insert a node at the end

Which method would you use to remove a node from a specific index in a linked list?

• insertFirst

• clearList

• insertLast

• removeAt

What happens when you call the clearList method on a linked list?

• It prints all the nodes

• It sets the head to null and length to zero

• It removes the last node

• It removes the first node

What is the significance of the head in a linked list?

• It points to the last node

• It is used to sort the list

• It stores the length of the list

• It is the first node in the list