Interview Questions - Data Structures

21.
Does the minimum spanning tree of a graph give the shortest distance between any 2 specified nodes?
No. The Minimal spanning tree assures that the total weight of the tree is kept at its minimum. But it doesn't mean that the distance between any two nodes involved in the minimum-spanning tree is minimum.

22.
Which is the simplest file structure? (Sequential, Indexed, Random)
Sequential is the simplest file structure.

23.
Whether Linked List is linear or Non-linear data structure?
According to Access strategies Linked list is a linear one.
According to Storage Linked List is a Non-linear one.