SDE - 1

Differences with Relational and Non relational data bases. 
What are mongoDB indexes.
What are aggregations in the MongoDb

For a given input string(str), write a function to print all the possible substrings.

Substring

A substring is a contiguous sequence of characters within a string. 
Example: "cod" is a substring of "coding". Whereas, "cdng" is not as the characters taken are not contiguous

There were many Questions related to the JS language. Like the differneces between the First Class Functions, High order function. Diff b/w let, var and const. Event loop and Promises and their uses

It was a technical discussion with Team Lead regarding the System design, NodsJS implementation with REST APIS and DB structure for Instagram App

There were question regarding the Joining Date and CTC . Also HR asked  Why I was changing the organisation?