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Linked list Basics

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Beginner

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4.5 Hrs

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9.7K+
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About this Free Certificate Course

LinkedList is one of the essential dynamic data structures. Learning LinkedList can help you know and implement further concepts like queue and stacks, enabling you to solve real-time problems.

In this course, we will briefly walk you through what is LinkedList? You will be learning about the operations that can be done on LinkedList like traversal operations, insert and delete operations. Also, you will be going through some of the programs and a hands-on explanation that will help you improve your practical knowledge of LinkedList. Understanding these concepts will help you efficiently implement LinkedList.

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Course Outline

Introduction to Linked List

This session revolves around a brief introduction to the LinkedList data structure. You will be learning what LinkedList is? And Why LinkedList? With the examples given, you will get a better understanding of the LinkedList data structure.

Traversal Operation

In this session, you will learn how to traverse through a LinkedList. The Basic idea here is to go through the list from beginning to end. You will be going through what is the Traversal operation? And How to traverse through the LinkedList?

Insert Operation

This session will familiarize you with the Insert Operation on LinkedList. You will also be going through different test cases of Insert Operation.

Delete Operation

This session will help you learn how to delete nodes from the LinkedList. You will also be going through a few of the test cases of Delete Operation on LinkedList.

Linked List Program - Part 1

A LinkedList program is discussed with a hands-on explanation.

 

Linked List Program - Part 2

A LinkedList program is discussed with a hands-on explanation.

 

Linked List Program - Part 3

A LinkedList program is discussed with a hands-on explanation

Linked List Program - Part 4

A LinkedList program is discussed with a hands-on explanation.

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Linked list Basics

4.5 Learning Hours . Beginner

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Frequently Asked Questions

What is a Linked List?

LinkedList is one of the efficient data structures that stores data and has reference to the next node.

What is the use of Linked List?

Some of the applications of the linked list include 

  • Implementation of stacks and queues.
  • Implementation of graphs.
  • Allows dynamic memory allocation.
  • Helps in maintaining the directory.

What is traversal in linked lists?

Traversal is the operation that helps in accessing any node of the LinkedList and is a one-way operation.

How do you show linked list operations for traversing?

Traversal is the linked list operation that is a one-way operation and, in output, provides all the nodes included in the linked list.

What is insertion in the linked list?

Insertion is a linked list operation that allows you to insert new nodes to the linked list for storing newly added data.

How do we use insertion in a linked list?

We use insertion operation in a linked list to add a new element, keeping in mind the various test cases that it should satisfy.

 

What is the deletion operation in the linked list?

Deletion operation is used to remove the unwanted nodes from the linked list.

 

What are the ways of implementing linked lists?

A linked list in C can be implemented through structure and pointers. You define a data type using typedef, using malloc() you dynamically allocate the memory, and size of() helps you determine the size of an element in bytes. Through pointers, you can link these nodes to create a linked list.

Will I get a certificate after completing this LinkedList free course?

Yes, you will get a certificate of completion for LinkedList after completing all the modules and cracking the assessment. The assessment tests your knowledge of the subject and badges your skills.

How much does this LinkedList course cost?

It is an entirely free course from Great Learning Academy. Anyone interested in learning the basics of LinkedList can get started with this course.

Is there any limit on how many times I can take this free course?

Once you enroll in the LinkedList course, you have lifetime access to it. So, you can log in anytime and learn it for free online.

Can I sign up for multiple courses from Great Learning Academy at the same time?

Yes, you can enroll in as many courses as you want from Great Learning Academy. There is no limit to the number of courses you can enroll in at once, but since the courses offered by Great Learning Academy are free, we suggest you learn one by one to get the best out of the subject.

Why choose Great Learning Academy for this free LinkedList course?

Great Learning Academy provides this LinkedList course for free online. The course is self-paced and helps you understand various topics that fall under the subject with solved problems and demonstrated examples. The course is carefully designed, keeping in mind to cater to both beginners and professionals, and is delivered by subject experts. Great Learning is a global ed-tech platform dedicated to developing competent professionals. Great Learning Academy is an initiative by Great Learning that offers in-demand free online courses to help people advance in their jobs. More than 5 million learners from 140 countries have benefited from Great Learning Academy's free online courses with certificates. It is a one-stop place for all of a learner's goals.

What are the steps to enroll in this LinkedList course?

Enrolling in any of the Great Learning Academy’s courses is just one step process. Sign-up for the course, you are interested in learning through your E-mail ID and start learning them for free online.

Will I have lifetime access to this free LinkedList course?

Yes, once you enroll in the course, you will have lifetime access, where you can log in and learn whenever you want to.

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LinkedList is considered as one of the favored and efficient data structures. Each node of the LinkedList consists of data and a pointer to the address of the next node. The LinkedList can be implemented using many programming languages like C, Python, C#, and Java.

LinkedList paves an easy way to play with pointers. By efficiently manipulating LinkedList with the help of these pointers, you can learn advanced data structures like Trees and Graphs.

 

Why Learn LinkedList?

Some of the data structures you learned were contiguous memory allocations. Data structures such as Array, Queue, and Stacks are a chain of neighbors, whereas a LinkedList is considered the chain of relatives.

An Array is a linear data structure. Like an array, LinkedList is also a linear data structure. Still, the big difference between an array and a LinkedList is that an array stores the data in a contiguous memory location. A LinkedList stores data in a not so contiguous manner. The LinkedList makes use of pointers to link all its nodes.

You may think implementing an array and storing data in a contiguous location is far easier than implementing the LinkedList and managing pointers. So, why take the risk to learn LinkedList?

Yes, storing data in contiguous locations in an array is good but not an optimal solution for real-time problems where you have to put up with lots of operations on an array which later on becomes a big headache. This is where LinkedList comes into the picture. You can smartly handle all these operations and the memories used with the help of pointers.

Even though you think handling pointers may be an issue, you will soon figure out after implementing the LinkedList that handling these pointers helps you reach your optimal solution for your real-time problems, far better than struggling to find an optimal solution for your problem.

 

Even though an array is contiguous and easier to implement, it has several limitations that can be solved by implementing the LinkedList.

  • An array has a fixed size. Thus, you always have to look out for its upper limit for storing the data. In contrast, in a LinkedList, you can easily store your data into a new memory location by creating a new node and linking it with the previous node pointer. So, you need not worry about the upper bound in the LinkedList.

 

  • Suppose you are trying to insert new data between the array. You need to shift all the other data to its following memory location while in a LinkedList; this operation is far more manageable. While adding the new node, you just have to manipulate the new node’s pointer and change the pointer reference of the previous node to this new node, which makes your job easier.

 

  • Deletion operation in an array also comes at its own expense, while in a LinkedList, this operation can be done more easily with the help of the pointers.

 

Both array and LinkedList have their pros and cons. LinkedList makes your life a lot better by helping you in solving complex problems. Also, in terms of better memory usage, LinkedList is the better approach.

The operating system uses a paging and segmentation approach for memory allocation, which is non-contiguous. The LinkedList is one such approach that is a linear but non-contiguous data structure that helps you to save a lot of memory and makes use of small chunks of free memory.

 

Types of LinkedList

  • Singly LinkedList : A Singly LinkedList is the same as a LinkedList.

  • Doubly LinkedList : Doubly LinkedList node consists of a pointer to the previous node address, data, and a pointer to the next node address. Nowadays, many operating systems use these doubly LinkedList to note all the active processes and threads.

  • Circular LinkedList : Circular LinkedList is similar to Singly LinkedList, but the last node of the list has a null reference, which helps point it to the first node of the LinkedList. This leads to the creation of the circular LinkedList.

 

Some of the use cases of a circular LinkedList can be implemented using the doubly LinkedList as well.

 

Operations :

·       Traversal

Traversal is the operation that helps in accessing any node of the LinkedList. Traversal is only a one-way operation; there is no going back.

 

·       Insertion

Insertion is the operation to add a new element to the LinkedList.

 

While adding a new node, there are three test cases that you need to take care of:

1. Inserting the node at the beginning of the LinkedList.

2. Inserting the node in the middle of the LinkedList.

3. Inserting the node at the end of the LinkedList.

 

·       Deletion

Deletion Operation is useful to remove the existing node from the LinkedList.

While deleting a node, you need to take care of three of the test cases:

1. Deleting the node from the beginning of the LinkedList.

2. Deleting the node from the middle of the LinkedList.

3. Deleting the node at the end of the LinkedList.

 

·       Reverse Operation

This is one of the meticulous operations of LinkedList. In this reverse operation, you need to implement the LinkedList so that the head pointer should point to the last node of the LinkedList, and the pointers of each node are pointing to the previous node, and the LinkedList is reversed.

 

Applications of LinkedList

  • Dynamic memory allocation
  • Implemented in Queue and Stack
  • Graphs, Trees, and Hash Tables
  • In “undo” software’s functionality

 

Why This Course?

What is better than learning something from scratch? Yes, this course is something that takes up the LinkedList topic from scratch. Sign Up for this LinkedList free course on Great Learning Academy to make your building blocks of the LinkedList stronger.

The course has video content of 2.5 hours where you will learn the basics of LinkedList, the operations and also get hold of the hands-on session on LinkedList. You can also test your knowledge on LinkedList at the end of the course with the help of the quiz provided.

This course is smartly designed for Beginners like you looking forward to learning something new with a better understanding. Whether you are from a technical or non-technical background, this course will help you learn, understand, and implement LinkedList more smoothly. Hurry Up! And get hold of this Free LinkedList course Now.

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