Question

examples of non linear data structures?

Answer 1

The data structure is said to be a Linear data structure if 
its elements are in sequence and form a linear list.
Ex. Arrays, Stacks, Queues,Linked Lists.

If the elements of data structure do not form a sequence or a 
linear list then that type of data structure is called as Non-
Linear data structure.
Ex. Trees, BST(Binary Search Trees) etc.