Associate Software Engineer

Ninja is learning a new but strange language known as Alien Language. Alien language possesses the same alphabets as of English language, but their order is different. The order of letters are given as ‘ORDER’ string. Ninja has ‘N’ words in the ‘WORDS’ array. Ninja’s task is to check whether the words of ‘WORDS’ are sorted lexicographically in this alien language or not.

Note: ‘ORDER’ consists of all 26 letters of English alphabet.

For Example

If ‘WORDS’ = ["word","world","row"], ‘ORDER’ = "worldabcefghijkmnpqstuvxyz",the answer will be ‘NO’ as first and second words are not lexicographically sorted as ‘l’ comes before ‘d’ in alien language.

You are given an N * N binary matrix 'MAT'. You can do two operations in the matrix:

i) Swap any two rows.
ii) Swap any two columns. 

Your task is to find the minimum number of operations needed to convert this matrix into a chessboard matrix.

If the task is impossible print -1.

Note:

A chessboard matrix is a binary matrix where there are no two 0’s and no two 1’s who are adjacent to each other.

For example:

[ [1, 0], [0, 1] ] and [ [0, 1], [1, 0] ]  are chessboard matrix whereas [ [1,0], [1, 1] ] isn’t.

Given two integers ‘Left’ and ‘Right’. Your task is to find the total count of ‘megaprime’ numbers from the range ‘Left’ to ‘Right’. A ‘megaprime’ number is a prime number and its individual digits are also prime.

For example, ‘53’ is a ‘megaprime’ number because ‘53’ is a prime number and its individual digits,‘3’ and ‘5’, are also prime. ‘13’ is not a ‘megaprime’ number because out of its individual digits (1, 3), ‘1’ is not prime.

Note :

1.’Left’ and ‘Right’ both are inclusive in the range ‘Left’ to ‘Right’.

Example :

‘Left’ = ‘23’  and ‘Right’ = ‘37’

All prime numbers from ‘23’ to ‘37’ are 23, 29, 31, 37

23 is ‘megaprime’ number because ‘2’ and ‘3’ both are prime
29 is not ‘megaprime’ number because ‘9’ is not a prime
31 is not a ‘megaprime’ number because ‘1’ is not a prime number
37 is ‘megaprime’ number because ‘3’ and ‘7’ both are prime numbers
Hence there are two ‘megaprime’ numbers 23, 37 out of 23, 29, 31, 37.

Given an array 'arr' with 'n' elements, the task is to rotate the array to the left by 'k' steps, where 'k' is non-negative.

Example:

'arr '= [1,2,3,4,5]
'k' = 1  rotated array = [2,3,4,5,1]
'k' = 2  rotated array = [3,4,5,1,2]
'k' = 3  rotated array = [4,5,1,2,3] and so on.

What is normalization?

What are 4 pillars of OOPS?

What are different types of keys in SQL?

What is your current location?

Will you be available to join the company on specified date?