Linked List Quiz: Data Structure Practice

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Questions and Answers

What is a linked list, and how is the ordering of its nodes determined?

A linked list is a collection of nodes that together form a linear ordering, where each node is an object that stores a reference to an element and a reference called next to another node, determining the ordering.

What are the two parts of a node in a linked list?

The two parts of a node are: data or information of the element, and a pointer (or reference) to the next node.

How does a linked list optimize memory space?

A linked list does not waste memory space, and each node can reside anywhere in the memory and be linked together to make a list, achieving optimized utilization of space.

What is the limitation of the size of a linked list?

The size of a linked list is limited to the memory size, but it doesn't need to be declared in advance. Signup and view all the answers

What type of data can be stored in a node of a linked list?

A node can store values of primitive types or objects. Signup and view all the answers

What is the advantage of using linked lists in terms of empty nodes?

Empty nodes cannot be present in a linked list. Signup and view all the answers

In a circular linked list, what is the relationship between the last element and the first element?

The last element contains a link to the first element as next, and the first element has a link to the last element as prev. Signup and view all the answers

What is the term used to describe the first node in a linked list?

Head Signup and view all the answers

In a single linked list, what happens to the value of the head when the list is empty?

The value of the head points to NULL. Signup and view all the answers

How are nodes typically represented in Java?

As a separate class, with the LinkedList class containing a reference of Node class type. Signup and view all the answers

What is the process of inserting a new node into a singly linked list?

A record is created holding the new item, the next pointer of the new record is set to link it to the item which is to follow it in the list, and the next pointer of the item which is to precede it must be modified to point to the new item. Signup and view all the answers

Where can a new node be added in a singly linked list?

At the front of the linked list, or after a given node. Signup and view all the answers

In a LinkedList, what is the purpose of the 'Next' link in each node?

To contain a link to the next node in the LinkedList Signup and view all the answers

What is the term used to describe the first node of a LinkedList?

Head Signup and view all the answers

In a Doubly Linked List, what is the purpose of the 'Prev' link in each node?

To contain a link to the previous node in the LinkedList Signup and view all the answers

What is the term used to describe the last node of a LinkedList?

Tail Signup and view all the answers

In a Linear Singly-Linked List, how is item navigation facilitated?

Forward only, with each element knowing where the next element is present Signup and view all the answers

What is the advantage of a Doubly Linked List over a Linear Singly-Linked List?

A Doubly Linked List can be traversed in both forward and backward directions Signup and view all the answers

Study Notes

Introduction to Linked Lists

A linked list is a collection of nodes that form a linear ordering, where each node stores a reference to an element and a reference to another node.
Linked lists do not waste memory space and can optimize space utilization.

Characteristics of Linked Lists

The list does not need to be continuously present in the memory, and nodes can reside anywhere in the memory.
The list size is limited to the memory size and does not need to be declared in advance.
Empty nodes cannot be present in the linked list.
Values of primitive types or objects can be stored in a singly linked list.

Linked List Terms

Head: the first node of a linked list.
Tail: the last node of a linked list, which has a null next reference.

Types of Linked Lists

Single Linked List: each node only has a reference to the next node.
Double Linked List: each node has references to both the next and previous nodes.
Circular Linked List: the pointer from the last element points back to the first element.

Single Linked List Representation

A linked list is represented by a pointer to the first node of the linked list.
In Java, a LinkedList can be represented as a class and a Node as a separate class.

Single Linked List Operations

Insertion can be performed at different positions, including at the front of the list, after a given node, or at the end of the list.
Deletion involves modifying the next pointer of the item preceding the deleted item.

Comparison with Arrays

Arrays have fixed memory allocation, whereas linked lists do not waste memory space.
Arrays have faster access time, whereas linked lists have faster insertion and deletion times.

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Description

This quiz covers the basics of linked lists, including its terms, differences from arrays, and types such as single and double linked lists. It also analyzes the complexity of linked lists.