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An Overview of Common Data Structures : Arrays, Linked lists, and Trees - Skillslash

BySkillslash Team| Published on May 8, 2023|2 mins

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An-Overview-of-Common-Data-Structures -Arrays-Linked-lists-and-Trees


Data structures are the fundamental building blocks of computer science. They are designed to store and organize data in a way that makes it easy to access, modify, and analyze. There are many different types of data structures, each with their own unique properties and uses. In this article, we will provide an overview of three common data structures: arrays, linked lists, and trees.


An array is a collection of elements, each identified by an index or a key. The elements in an array are typically of the same data type, such as integers or strings. Arrays can be one-dimensional or multidimensional, depending on the number of indices required to identify each element.

Arrays have several advantages over other data structures. They are simple to implement and provide fast access to individual elements, as elements can be accessed directly using their index. However, arrays have a fixed size, which means that the number of elements they can store is predetermined at the time of creation. This can make them less flexible than other data structures, such as linked lists.

Linked Lists

A linked list is a collection of elements, where each element contains a value and a pointer to the next element in the list. Unlike arrays, linked lists are not constrained by a fixed size and can grow dynamically as elements are added or removed. Linked lists are often used when the number of elements is unknown or can vary greatly over time.

Linked lists have many advantages over arrays. They are flexible, as elements can be added or removed from the list without having to move other elements around. Linked lists also have a smaller memory footprint than arrays, as they only allocate memory for the elements that are currently in the list. However, linked lists have slower access times than arrays, as elements must be accessed sequentially starting from the beginning of the list.


A tree is a hierarchical data structure that consists of nodes connected by edges. Each node contains a value and a set of child nodes, which are themselves trees. Trees are often used to represent hierarchical relationships, such as the file system of a computer or the organization of a company.

Trees also have several advantages over other data structures. They provide fast access to data, as elements can be accessed using a hierarchical structure. Trees are also flexible, as they can be easily modified by adding or removing nodes. However, trees can be more complex to implement than other data structures, and their access times can be slower than arrays or linked lists.

In conclusion, arrays, linked lists, and trees are three common data structures used in computer science. Arrays provide fast access to data but are constrained by a fixed size. Linked lists are flexible and can grow dynamically, but have slower access times than arrays. Trees are hierarchical and provide fast access to data, but can be more complex to implement than other data structures. Each data structure has its own unique properties and uses, and the choice of which data structure to use depends on the specific requirements of the problem being solved.

Final Words

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