Digital Specialist Interview Questions and Answers for Freshers

An algorithm for trees in data structures.

• A tree is a hierarchical data structure with a set of connected nodes.

• Common operations on trees include insertion, deletion, and traversal.

• There are different types of trees such as binary trees, AVL trees, and B-trees.

• Tree algorithms often involve recursion and depth-first or breadth-first traversal.

• Examples of tree algorithms include finding the height of a tree or checking if it is balanced.

Lists and tuples are both sequence data types in Python, but they have some key differences.

• Lists are mutable, meaning their elements can be changed, added, or removed.

• Tuples are immutable, meaning their elements cannot be changed once defined.

• Lists are defined using square brackets [], while tuples use parentheses ().

• Lists are typically used for collections of similar items, while tuples are used for heterogeneous data.

• Lists have more built-in methods and are generally more ...read more

Merge Sort has a time complexity of O(n log n).

• Merge Sort is a divide-and-conquer algorithm that recursively divides the array into two halves.

• It then merges the sorted halves to produce a sorted array.

• The time complexity of Merge Sort is O(n log n), where n is the number of elements in the array.

• This makes Merge Sort efficient for sorting large arrays.

• Example: Sorting an array of 8 elements would require 3 merge steps (log base 2 of 8) and a total of 24 comparisons (8 * 3).