Core Java Programming Course- ArrayList vs. LinkedList

This video tutorial explains the differences between ArrayList and LinkedList. It covers how ArrayList uses a dynamic array with indexed access, making it faster for retrieving elements. In contrast, LinkedList uses a doubly linked list, requiring traversal from the head, which is slower for access but faster for insertion and deletion due to its pointer-based structure. The video concludes with a summary of these differences, highlighting when to use each data structure based on the operations needed.

What is the internal structure used by an ArrayList?

• Doubly linked list

• Singly linked list

• Hash table

• Dynamic array

Why is accessing an element in an ArrayList faster than in a LinkedList?

• LinkedList elements are stored in a dynamic array.

• LinkedList elements are indexed, allowing direct access.

• ArrayList elements are indexed, allowing direct access.

• ArrayList elements are stored in a hash table.

What is a disadvantage of accessing elements in a LinkedList?

• Elements require traversal from the head.

• Elements are stored in a dynamic array.

• Elements are indexed, allowing direct access.

• Elements are stored in a hash table.

Which data structure is more efficient for frequent insertions and deletions?

• ArrayList

• LinkedList

• TreeSet

• HashMap

What happens when you insert an element in the middle of an ArrayList?

• The element is added without shifting others.

• All subsequent elements are shifted in memory.

• The list is rehashed.

• The element is linked using pointers.