SDE - 1

You are given a Binary Tree.

Return the length of the diameter of the tree.

Note :

The diameter of a binary tree is the length of the longest path between any two end nodes in a tree.

The number of edges between two nodes represents the length of the path between them.

Example :

Input: Consider the given binary tree:

Output: 6

Explanation:
Nodes in the diameter are highlighted. The length of the diameter, i.e., the path length, is 6.

You have been given an integer array/list(arr) and a number 'Sum'. Find and return the total number of pairs in the array/list which when added, results equal to the 'Sum'.

Note:

Given array/list can contain duplicate elements.

(arr[i],arr[j]) and (arr[j],arr[i]) are considered same.

Given two 1-dimensional arrays containing strings of lowercase alphabets, print the elements that are common in both the arrays i.e. the strings that are present in both the arrays.

Note:

An element of one array can be mapped only to one element of the array. For example :

Array 1 = {“ab”, “dc”, “ab”, “ab”}
Array 2 = {“dc”, “ab”, “ab”} 

The common elements for the above example will be “dc”, “ab”, and “ab”. 

For a given two strings, 'str1' and 'str2', check whether they are a permutation of each other or not.

Permutations of each other

Two strings are said to be a permutation of each other when either of the string's characters can be rearranged so that it becomes identical to the other one.

Example: 
str1= "sinrtg" 
str2 = "string"

The character of the first string(str1) can be rearranged to form str2 and hence we can say that the given strings are a permutation of each other.

A thief wants to loot houses. He knows the amount of money in each house. He cannot loot two consecutive houses. Find the maximum amount of money he can loot.

What is thread in OS?

What is a process? What are the different states of a process?

What are joins?

Give brief about your projects.

what is Activity lifecycle in Android Development.

Give your introduction. what are your projects

How do you rate your coding skills.

what do you know about our company.? Tell me about your strengths and weaknesses .

Which subject you liked most and unlike most.