What Are Two Types of Data Structure?


Scott Campbell

Data structures are an essential part of computer programming. They allow us to store, organize, and manipulate data efficiently.

There are various types of data structures, each with its own unique characteristics and use cases. In this article, we will explore two fundamental types of data structures: arrays and linked lists.


An array is a collection of elements of the same type stored in contiguous memory locations. It provides a way to access individual elements using an index. Arrays have a fixed size, meaning that once created, their length cannot be changed.

Advantages of arrays:

  • Random access: Elements in an array can be accessed directly using their index.
  • Efficient memory utilization: Arrays use a fixed amount of memory that is pre-allocated.
  • Easy implementation: Arrays are simple to understand and implement.

Disadvantages of arrays:

  • Fixed size: The size of an array cannot be changed dynamically during runtime.
  • Inefficient insertion and deletion: Inserting or deleting elements in an array requires shifting other elements, resulting in inefficient performance.

Linked Lists

A linked list is a data structure composed of nodes that contain both the data and a reference (or link) to the next node in the sequence. Unlike arrays, linked lists do not require contiguous memory allocation; each node can be located anywhere in memory.

Advantages of linked lists:

  • Dynamic size: Linked lists can grow or shrink dynamically during runtime.
  • Efficient insertion and deletion: Inserting or deleting elements in a linked list only requires modifying the references, resulting in efficient performance.
  • Flexibility: Linked lists can be easily modified to accommodate different requirements.

Disadvantages of linked lists:

  • No random access: Unlike arrays, accessing elements in a linked list requires traversing the list from the beginning.
  • Inefficient memory utilization: Linked lists use additional memory to store references between nodes.

In conclusion, arrays and linked lists are two fundamental types of data structures with their own advantages and disadvantages. Arrays provide random access but have a fixed size, while linked lists offer dynamic size and efficient insertion/deletion at the cost of random access. Understanding these data structures is crucial for effective programming and problem-solving.

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