What Is Data Structure Example?


Angela Bailey

Data Structure Example – Explained in Detail

When it comes to programming and computer science, data structures play a crucial role in organizing and storing data efficiently. A data structure is a way of organizing and managing data so that it can be accessed and utilized effectively. In this article, we will explore different examples of data structures and understand their significance in programming.


An array is one of the simplest and most commonly used data structures. It represents a collection of elements, each identified by an index or key.

The elements in an array are stored in contiguous memory locations, allowing for quick access to any element using its index. Arrays are used to store homogeneous or similar types of data, such as a list of numbers or names.


  • int[] numbers = {1, 2, 3, 4};
  • String[] names = {“John”, “Jane”, “Bob”};

Linked List

A linked list is another example of a data structure that consists of a sequence of nodes where each node contains a reference to its successor node. Unlike arrays, linked lists do not require contiguous memory allocation. The nodes can be scattered throughout the memory as they only need to keep track of the next node in the sequence.


  • Node head = new Node(10);
  • head.next = new Node(20);
  • head.next.next = new Node(30);


A stack is an abstract data type that follows the Last-In-First-Out (LIFO) principle. It can be imagined as a stack or pile of objects where the last object placed on top is the first one to be removed. Stacks are used for various purposes, such as tracking function calls, evaluating expressions, and handling undo-redo operations.


  • Stack<Integer> stack = new Stack<>();
  • stack.push(10);
  • stack.push(20);
  • stack.pop();


A queue is another abstract data type that follows the First-In-First-Out (FIFO) principle. It is similar to a queue of people waiting in line, where the first person who joins the queue is the first one to be served. Queues are commonly used in scenarios like job scheduling, handling requests, and implementing breadth-first search algorithms.


  • Queue<String> queue = new LinkedList<>();
  • queue.add(“Alice”);
  • queue.add(“Bob”);
  • queue.remove();


A tree is a hierarchical data structure with a set of connected nodes. It consists of nodes where each node can have zero or more child nodes.

The topmost node is called the root node, and each child node has only one parent node. Trees are widely used in applications like file systems, organization hierarchies, and decision-making processes.


  • TreeNode root = new TreeNode(“A”);
    • -root.left = new TreeNode(“B”);
      • –root.left.left = new TreeNode(“C”);
      • –root.right = new TreeNode(“D”);
    • -root.right = new TreeNode(“E”);


Data structures are an essential part of programming as they provide a systematic way of organizing and manipulating data. In this article, we explored various examples of data structures, including arrays, linked lists, stacks, queues, and trees. Understanding these data structures and their applications can greatly enhance your programming skills and enable you to write more efficient code.

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