Difference between Linear and Non-linear Data Structures
Last Updated : 28 Feb, 2023
Linear Data Structure:
Data structure where data elements are arranged sequentially or linearly where each and every element is attached to its previous and next adjacent is called a linear data structure. In linear data structure, single level is involved. Therefore, we can traverse all the elements in single run only. Linear data structures are easy to implement because computer memory is arranged in a linear way. Its examples are array, stack, queue, linked list, etc.
1. Array
The array is a type of data structure that stores elements of the same type. These are the most basic and fundamental data structures. Data stored in each position of an array is given a positive value called the index of the element. The index helps in identifying the location of the elements in an array.
If supposedly we have to store some data i.e. the price of ten cars, then we can create a structure of an array and store all the integers together. This doesn’t need creating ten separate integer variables. Therefore, the lines in a code are reduced and memory is saved. The index value starts with 0 for the first element in the case of an array.
2. Stack
The data structure follows the rule of LIFO (Last In-First Out) where the data last added element is removed first. Push operation is used for adding an element of data on a stack and the pop operation is used for deleting the data from the stack. This can be explained by the example of books stacked together. In order to access the last book, all the books placed on top of the last book have to be safely removed.
3. Queue
This structure is almost similar to the stack as the data is stored sequentially. The difference is that the queue data structure follows FIFO which is the rule of First In-First Out where the first added element is to exit the queue first. Front and rear are the two terms to be used in a queue.
Enqueue is the insertion operation and dequeue is the deletion operation. The former is performed at the end of the queue and the latter is performed at the start end. The data structure might be explained with the example of people queuing up to ride a bus. The first person in the line will get the chance to exit the queue while the last person will be the last to exit.
4. Linked List
Linked lists are the types where the data is stored in the form of nodes which consist of an element of data and a pointer. The use of the pointer is that it points or directs to the node which is next to the element in the sequence. The data stored in a linked list might be of any form, strings, numbers, or characters. Both sorted and unsorted data can be stored in a linked list along with unique or duplicate elements.
5. Hash Tables
These types can be implemented as linear or non-linear data structures. The data structures consist of key-value pairs.
Non-linear Data Structure:
Data structures where data elements are not arranged sequentially or linearly are called non-linear data structures. In a non-linear data structure, single level is not involved. Therefore, we can’t traverse all the elements in single run only. Non-linear data structures are not easy to implement in comparison to linear data structure. It utilizes computer memory efficiently in comparison to a linear data structure. Its examples are trees and graphs.
1. Trees
A tree data structure consists of various nodes linked together. The structure of a tree is hierarchical that forms a relationship like that of the parent and a child. The structure of the tree is formed in a way that there is one connection for every parent-child node relationship. Only one path should exist between the root to a node in the tree. Various types of trees are present based on their structures like AVL tree, binary tree, binary search tree, etc.
2. Graph
Graphs are those types of non-linear data structures which consist of a definite quantity of vertices and edges. The vertices or the nodes are involved in storing data and the edges show the vertices relationship. The difference between a graph to a tree is that in a graph there are no specific rules for the connection of nodes. Real-life problems like social networks, telephone networks, etc. can be represented through the graphs.
Difference between Linear and Non-linear Data Structures:
| S.NO | Linear Data Structure | Non-linear Data Structure |
| 1. | In a linear data structure, data elements are arranged in a linear order where each and every element is attached to its previous and next adjacent. | In a non-linear data structure, data elements are attached in hierarchically manner. |
| 2. | In linear data structure, single level is involved. | Whereas in non-linear data structure, multiple levels are involved. |
| 3. | Its implementation is easy in comparison to non-linear data structure. | While its implementation is complex in comparison to linear data structure. |
| 4. | In linear data structure, data elements can be traversed in a single run only. | While in non-linear data structure, data elements can’t be traversed in a single run only. |
| 5. | In a linear data structure, memory is not utilized in an efficient way. | While in a non-linear data structure, memory is utilized in an efficient way.
|
| 6. | Its examples are: array, stack, queue, linked list, etc. | While its examples are: trees and graphs. |
| 7. | Applications of linear data structures are mainly in application software development. | Applications of non-linear data structures are in Artificial Intelligence and image processing. |
| 8. | Linear data structures are useful for simple data storage and manipulation. | Non-linear data structures are useful for representing complex relationships and data hierarchies, such as in social networks, file systems, or computer networks. |
| 9. | Performance is usually good for simple operations like adding or removing at the ends, but slower for operations like searching or removing elements in the middle. | Performance can vary depending on the structure and the operation, but can be optimized for specific operations. |
Similar Reads
Difference Between Stack and Queue Data Structures
In computer science, data structures are fundamental concepts that are crucial for organizing and storing data efficiently. Among the various data structures, stacks and queues are two of the most basic yet essential structures used in programming and algorithm design. Despite their simplicity, they
4 min read
Difference Between Linear and Non-Linear Equations
Difference Between Linear and Non-Linear Equations: While solving mathematical problems, you may have seen types of equations. Few Equations can contain only numbers, others consist of only variables while some consist of both numbers and variables. Linear and nonlinear equations usually consist of
4 min read
Difference between Database and Data Structure
It is important to understand the fundamental difference between a database and a data structure. Basically, the database is used to store large amounts of data in a specific manner, that can be assessed, maintained, and updated by a database management system. There are many ways of organizing the
4 min read
Difference between Data Structures and Algorithms
What are Data Structures and Algorithms? Data structures and algorithms are two interrelated concepts in computer science. Data structures refer to the organization, storage, and retrieval of data, while algorithms refer to the set of instructions used to solve a particular problem or perform a spec
2 min read
Difference between data type and data structure
Data Type A data type is the most basic and the most common classification of data. It is this through which the compiler gets to know the form or the type of information that will be used throughout the code. So basically data type is a type of information transmitted between the programmer and the
4 min read
Difference between Rectilinear motion and Linear motion
The free movement of an object in relation to time is known as motion. It can be described as the act of shifting one's position. For instance, a moving train, a rotating fan, a rolling ball, and so forth. Even though the planet is always in motion, there are several sorts of motion that will help y
7 min read
Difference between Information and Data
Data and Information are important concepts in the world of computing and decision-making. Data is defined as unstructured information such as text, observations, images, symbols, and descriptions on the other hand, Information refers to processed, organized, and structured data. It gives context to
4 min read
Difference between Hierarchical and Network Data Model
Data models are essential for specifying data organization, storage, and retrieval techniques in the field of database administration. The Network Data Model and the Hierarchical Data Model are two important concepts that have influenced how databases are created and used. Each of these models has c
6 min read
Difference Between byte, short, int and long Datatype in Java
There are two types of data types namely primitive datatype/fundamental and non-primitive/derived datatype. The primitive data type is defined as local sets or default set of datatype already present while deriving a datatype or creating a set of datatype using them are known as derived data types s
4 min read
Difference between Structured, Semi-structured and Unstructured data
Big Data includes huge volume, high velocity, and extensible variety of data. There are 3 types: Structured data, Semi-structured data, and Unstructured data. Structured data - Structured data is data whose elements are addressable for effective analysis. It has been organized into a formatted repos
2 min read