Application of Linked List: A linked list is one of the most important concepts and data structures to learn while preparing for an interview. application of doubly-linked lists Having a good understanding of linked lists can be a huge plus point in a coding interview. A linked list is a linear data structure. Unlike arrays, elements are not stored in contiguous locations. Linked list nodes are connected using pointers. Each node consists of 2 parts:
- Data: The data that is stored at a particular address.
- Reference: Contains the address of the next node of the linked list.
एक साक्षात्कार की तैयारी करते समय सीखने के लिए एक लिंक्ड सूची सबसे महत्वपूर्ण अवधारणाओं और डेटा संरचनाओं में से एक है। लिंक्ड सूचियों की अच्छी समझ होना एक कोडिंग साक्षात्कार में एक बड़ा प्लस पॉइंट हो सकता है। एक लिंक्ड सूची एक रैखिक डेटा संरचना है। सरणियों के विपरीत, तत्वों को सन्निहित स्थानों में संग्रहीत नहीं किया जाता है। लिंक्ड लिस्ट नोड्स पॉइंटर्स का उपयोग करके जुड़े हुए हैं। प्रत्येक नोड में 2 भाग होते हैं:
- डेटा: वह डेटा जो किसी विशेष पते पर संग्रहीत होता है।
- संदर्भ: लिंक की गई सूची के अगले नोड का पता शामिल है।
What are Linked List?
To understand what a linked list is, it is necessary to talk about what kind of data structure they are. An important aspect of linked lists is that they are linear data structures, which provides that order exists and a sequence of how they can be created and traversed. We can depict a linear data structure like the chalk lines in a game of hopscotch. We have to go through all the items sequentially to reach the end of the list.
A linked list can be thought of as both a linear data structure and a dynamic data structure. A linked list consists of a series of continuous nodes. A single node is simply an object that includes such things as “next” and “data” pointers that point to the next node in the position of a circular and singly linked list, and also a “prev” pointer that points to an earlier node. In the case of a doubly linked list.
Thus, it forms a chain-like structure. It can efficiently accomplish operations like insertion, append, and delete without restructuring the whole list because memory allocation is accomplished during run-time, but if we want the same operations on an array it should allocate fixed memory, So its run time will be more expensive. So, this is the most important aspect to use linked lists when it comes to memory and storage. A linked list can perform operations at a higher level than the basic one. Since it is dynamic, the size/length can be increased or decreased as per the requirement. It is widely used in real-life applications because of the way it functions and the many benefits it has for memory. A linked list is the second most used data structure after array. application of circular linked list
Some Essential terms to understand the idea of a linked list.
- Linked – Each link in the linked list stores data called an element.
- Next – Each link in a linked list includes a link to the link after the next name.
- LinkedList – A Linked List contains the connection link of the most important link named first.
- A data structure is a collection of data that can be incorporated into any programming language.
- A pointer holds the address of a value in memory. They can indicate nothing (NULL). A reference is extremely similar, although they may point to nothing.
A linked list can be large or small, regardless of size, the components that makeup it is just nodes. Linked lists are simply a sequence of nodes, which are the elements of the list.
Applications of linked list in Computer Science:
- Dynamic Memory Allocation: As we know, we can allocate memory dynamically in a linked list, so it can be very useful when we don’t know how many elements we are going to use.
- Implementing advanced data structures: We can implement data structures like Stack and Queue with the help of a linked list.
- Manipulation of Polynomials: We can manipulate polynomials by storing constants in the nodes of the linked list with the help of a linked list.
- Arithmetic Operations on Long Integers: Since integers have a limit, we cannot perform arithmetic operations on long integers. But, if we use a linked list to represent long integers, we can do the operations easily.
- Graph adjacency list representation: Linked list helps to store the adjacent vertices of the graph in the adjacency list representation.
Application of linked list in Real World
- In the web browser, you must have noticed that we can always access the previous and next URL by using the back and forward buttons. Access to the searched previous and next URLs is possible because they are linked using a linked list.
- Songs are linked to the next and previous songs in the music player. We can play songs from the beginning or end of the list.
- In an image viewer, the next and previous images are linked; So they can be accessed by the previous and next buttons.
Circular linked lists also have good uses. A circular linked list is a linked list in which the last node points to the head instead of pointing to NULL.
Applications of Circular Linked Lists
- We can use a circular linked list to implement advanced data structures like the Fibonacci heap.
- Circular lists are helpful in applications when you want to go through the list multiple times.
- When multiple programs are running on a PC, the operating system has to put them all in a list and then cycle through them, each giving the CPU time to execute before waiting until the other one is given.
- It is more convenient for operating systems to use a circular list so that it can return to the beginning when the end of the list is reached.
Circular Linked List can be used to implement Queue. If we use a circular linked list then we don’t need to maintain the head and rear pointer. We can store a pointer to the last node of the list, and HEAD can always be obtained as the next of the list. application of linked list in data structure
Benefits of linked list
- Dynamic Data Structure: Linked List being a dynamic data structure, it can shrink and grow at runtime by deallocating or allocating memory, so there is no requirement of initial size in the linked list. Whereas in an array, the initial size has to be declared, and the number of elements cannot exceed that size.
- No memory wastage: Since the size of the linked list can grow or shrink at runtime, there is no memory wastage. Only necessary memory is allocated. In arrays, we must first initialize it with a shape that we may or may not make full use of; Hence there may be wastage of memory.
- Implementation: Some very useful data structures such as Queue and Stack can be easily implemented using a linked list.
- Insertion and Delete operations: In a linked list, insertion and deletion operations are quite easy, as there is no need to shift every element after insertion or deletion.
- Only the addresses present in the pointers need to be updated.
- Whereas, in an array, we have to shift the elements.
FAQs on Application of Linked List
What are linked lists most used for?
Linked lists are commonly used because of their efficient insertion and deletion. They can be used to include Stack, Queue and other abstract data types.
What is the difference between Array and Linked List?
An array is a set of elements of a precise data type. A linked list is a set of objects called nodes where the node consists of two parts, namely data and address. Array elements are stored in an adjacent memory location. Linked list elements can be stored at any location in memory or can be stored randomly.
What is a real-life example of a linked list?
A linked list can be used to implement a queue. A canonical real-life example would be a line for a cashier. A linked list can also be used to implement a stack. An authentic real-life example would be one of those plate dispensers in a buffet restaurant that pulls the top plate off the top of the stack.
Is the linked list sequential?
Like heaps and queues, linked lists are a form of a sequential collection. It doesn’t have to be in sequence. A linked list is made up of independent nodes that can contain any type of data. Each node has a reference to the next node in the link
This linked list can be defined as a method of collecting and storing similar data items. Data Structures and Linked Lists provide a simple application of other data structures like Stacks and Queues. With different linked list types, it really simplifies the operations of insertion and deletion of nodes. Moreover, with a linked list, memory is not wasted as the size of a linked list can be increased or decreased during runtime. which of these is an application of linked lists
Now that you have the basic knowledge of linked lists, their uses, different types of linked lists, and single and double linked lists, it will be beneficial for your career advancement! If you are a budding, new programmer, linked lists are a data structure you will definitely need to understand for interviews and whiteboarding.