Software Engineer

You are given a positive integer 'N’. Your task is to find and return the minimum number of steps that 'N' has to take to get reduced to 1.

You can perform any one of the following 3 steps:

1) Subtract 1 from it. (n = n - ­1) ,
2) If n is divisible by 2, divide by 2.( if n % 2 == 0, then n = n / 2 ) ,
3) If n is divisible by 3, divide by 3. (if n % 3 == 0, then n = n / 3 ).

For example:

Given:
‘N’ = 4, it will take 2 steps to reduce it to 1, i.e., first divide it by 2 giving 2 and then subtract 1, giving 1.

You are given a string 'str' of length 'N'.

Your task is to return the longest palindromic substring. If there are multiple strings, return any.

A substring is a contiguous segment of a string.

For example :

str = "ababc"

The longest palindromic substring of "ababc" is "aba", since "aba" is a palindrome and it is the longest substring of length 3 which is a palindrome. 

There is another palindromic substring of length 3 is "bab". Since starting index of "aba" is less than "bab", so "aba" is the answer.

You are given a string ‘text’ and a string ‘pattern’, your task is to find all occurrences of pattern in the string ‘text’ and return an array of indexes of all those occurrences. You may assume that the length of ‘text’ is always greater than the length of ‘pattern’.

For example :

Let text = “this is a good place to have a good start”, pattern = “good” so you have to return {10, 31} because at 10 and 31 index pattern is present in the text.

Note :

If there is no such index in the text then just return an array containing -1.

Given that integers are read from a data stream. Your task is to find the median of the elements read so far.

Median is the middle value in an ordered integer list. If the size of the list is even there is no middle value. So the median is the floor of the average of the two middle values.

For example :

[2,3,4] - median is 3.
[2,3] - median is floor((2+3)/2) = 2.

You are given a list of strings, ‘DICTIONARY[]’ that represents the correct spelling of words and a query string ‘QUERY’ that may have incorrect spelling. You have to check whether the spelling of the string ‘QUERY’ is correct or not. If not, then return the list of suggestions from the list ‘DICTIONARY’. Otherwise, return an empty list which will be internally interpreted as the correct string.

Note:

1) The suggested correct strings for the string  ‘QUERY’ will be all those strings present in the ‘DICTIONARY[]’ that have the prefix same as the longest prefix of string ‘QUERY’.

2) The ‘DICTIONARY[]’ contains only distinct strings.

For example:

Given 'DICTIONARY[]' = {“ninja”, “ninjas”, “nineteen”, “ninny”} and query = “ninjk”. Since “ninjk” is not present in the ‘DICTIONARY[]’, it is an incorrect string. The suggested current spellings for “ninjk” are “ninja” and “ninjas”. It is because “ninj” is the longest prefix of “ninjk” which is present as the prefix in ‘DICTIONARY’.

1. What was your biggest challenge?
2. Did you ever work under pressure?
3. Your strengths and weaknesses
4. Later on, he asked some security related problems from my projects