Full Stack Engineer

Graph data based problem.

First they show few examples of how to solve the question then they give the questions.

Have the function Patternchaser (str) takestr which will be a string and return the longest pattern within the string. A pattern for this challenge will be defined as: if at least 2 or more adjacent characters within the string repeat at least twice. So for example "aabecaa" contains the pattern aa, on the other hand "abbbaac" doesn't contain any pattern. Your program should return yes/no pattern/null. So if str were "aabejiabkfabed" the output should be yes abe. If str were "123224" the output should return no null. The string may either contain all characters (a through z only), integers, or both. But the parameter will always be a string type. The maximum length for the string being passed in will be 20 characters. If a string for example is "aa2bbbaacbbb" the pattern is "bbb" and not "aa". You must always return the longest pattern possible.ExamplesInput: "da2kr32a2"Output: yes a2Input: "sskfssbbb9bbb" Output: yes bbb

Question about node js, website optimization techniques, also few computer network question. 
Eg : what process take place when you enter a site url in browser and how is it displayed on your screen. How do you optimise your website.

Where do you see yourself in 5 years.How do you learn new topics.etc.