Array | Linked List |
|---|---|
| Size of the array is fixed | Dynamic size |
| Less memory required | More memory required |
| Stored in contiguous Memory Locations | Stored in non-contiguous Memory Locations |
| Memory Should be allocated at Compile-Time | Memory is allocated at Run-Time |
| Elements can be modified easily by identifying the index value | Complex process for modifying the node |
| Elements cannot be added, deleted once it is declared | Nodes in the linked list can be added and deleted from the list |
| Directly access any element in an array | We can’t directly access any element but we need to traverse over the entire list |
| Shuffling the elements of an array requires more time | Shuffling the elements of a linked list requires less time |
| Access any element in an array take less time | Access any element in an array take more time |
| Arrays can hold only one value at a time | It can hold more than one at a time |
 |  |
FAQs
What is an Array?
An Array stores elements in contiguous memory locations. You can access elements directly using their index.
What is a Linked List?
A Linked List stores elements as nodes. Each node contains data and a pointer to the next node, forming a chain.
What are the key differences between an Array and a Linked List?
Memory Allocation: An Array allocates memory for all elements in one block. A Linked List dynamically allocates memory for each node as needed.
Access Time: You can access any element in an Array instantly using its index. A Linked List requires traversal to access a specific node.
Insertion/Deletion: Inserting or deleting elements in an Array takes more time, as you may need to shift elements. A Linked List allows efficient insertion or deletion by adjusting pointers.
Size Flexibility: An Array has a fixed size. A Linked List can grow or shrink dynamically, depending on the number of nodes.
Memory Usage: Arrays may waste memory if declared with extra space. Linked Lists use extra memory for pointers but avoid memory wastage due to dynamic allocation.
What are the advantages of using an Array?
– Arrays allow random access to elements.
– Arrays provide better cache performance due to contiguous memory allocation.
– Arrays suit applications where you know the size of the data in advance.
What are the advantages of using a Linked List?
– Linked Lists make insertion and deletion operations easier, especially in the middle of the list.
– Linked Lists dynamically allocate memory, which prevents wastage.
– Linked Lists allow flexibility in size, so you don’t need to declare a fixed size beforehand.
When should you use an Array?
Use an Array when you need fast access to elements and know the size of the data in advance. Arrays work well for scenarios where you perform fewer insertions and deletions.
When should you use a Linked List?
Use a Linked List when your application requires frequent insertions and deletions. Linked Lists work well in scenarios where the data size can grow or shrink dynamically.
Which is better: Array or Linked List?
The choice depends on your use case. Arrays perform better for quick access and fixed-size data. Linked Lists provide better flexibility for dynamic data and frequent updates.
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