Given two integer arrays X[] and Y[] of size m and n, respectively, write a program to find the intersection of these two arrays. The intersection of two arrays is a list of distinct numbers which are present in both arrays. The numbers in the intersection can be in any order.

The surrounding environment highly influences house prices but machine learning techniques can help us accurately predict the house price by taking account of all important features.

Given an array X[] of n integer elements, write a program to find the length of the longest subarray with a sum equal to 0. In general, for all j > i, find **max (j - i + 1)** among all subarray with zero-sum. Note: the length of a subarray starting from index i and ending at index j = j - i + 1.

Dropbox is a cloud storage service that allows users to store their data on remote servers. The remote servers store files durably and securely, and these files are accessible anywhere with an Internet connection.

Given a binary tree, write a program to find the height of it. A binary tree's height or depth is the total number of nodes or edges on the longest path from the root node to the leaf node.

Time series data is found everywhere, and to perform the time series analysis, we must preprocess the data first. Time Series preprocessing techniques have a significant influence on data modelling accuracy.