Advantages and Disadvantages of LinkedList

Nishant Rana
Last Updated: May 13, 2022
Difficulty Level :
EASY

Introduction:

 

LinkedList is a linear data structure that is used to store the data. Unlike arrays, data is not continuously stored in the LinkedList. Each data is linked to the other using pointers. Refer to the below image for more understanding.

 

Source: alphacodingskills.com

Linked List is one of the most important topic for interviews in product-based companies. Do check out the below video for the basic understanding of Linked List, it's use cases and applications.

Advantages of LinkedList:

 

  1. Dynamic Data Structure: In LinkedList, memory is dynamically allocated to the LinkedList. One can easily add or remove an element to the LinkedList at the runtime. Hence, there is no need for initial size.

 

  1. Implementation: LinkedList is a very useful Data Structure that helps implement other Data Structures like Stacks and Queues.

 

  1. No Memory Wastage: As discussed in the first point, memory is dynamically allocated to the LinkedList. That is why we can remove the memory which is not in use, and no memory is wasted.

 

  1. Insertion and Deletion: In LinkedList, insertion and deletion operations are efficient compared to other Data Structures such as Arrays as no shifting of elements is required in the LinkedList. Only the pointers need to be updated.

 

Disadvantages of LinkedList:

 

  1. Memory Usage: The memory used by LinkedList is more because we also need to store the address of the next data.

 

  1. Accessing an element: We can not access any element of the LinkedList directly. We don’t have direct access to every element of LinkedList. If we want to access the ith element of the LinkedList, then we need to traverse the LinkedList till the ith index.

 

  1. Reverse Traversal: The reverse traversal is not possible in the Singly LinkedList because we don’t have the memory address of the previous pointers. It is possible in the Doubly LinkedList, but again it consumes more memory as we need to store the memory address of the previous pointers.

 

FAQs:

 

  1. Can we access the random element of the LinkedList?
    • We can not access any element of the LinkedList directly. We don’t have direct access to every element of LinkedList. If we want to access the ith element of the LinkedList, then we need to traverse the LinkedList till the ith index.
  2. How is memory not wasted in LinkedList?
    • Since the memory is dynamically allocated to the LinkedList, we can remove the memory that is not in use, and no memory is wasted. 

 

Key Takeaways: 

 

In this blog, we have covered the following things:

  1. We first discussed what LinkedList is.
  2. Then we discussed the advantages and disadvantages of LinkedList.

 

If you want to learn more about Linked List and want to practice some questions which require you to take your basic knowledge on  Linked List a notch higher, then you can visit our Guided Path for  Linked List

 

Until then, All the best for your future endeavors, and Keep Coding.





 

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