A recruiter reached out and talked through the interview process and scheduled the first DSA round.

The interviewer asked an object-oriented question to model a system representing a real-time stock feed. The system needed to be able to query the current price, maximum price, and minimum price of a stock at any given time. The stock price feed was given as a List<PriceRecord>, and the list could be updated to correct past wrong records.

This was followed by another coding round with a different question. This time, the question was on graph traversal. It was: Given n routers represented by their x,y coordinates and a transmission range R for each router, determine if a message can be sent from a given source router to a given destination.

The interviewer asked an object-oriented question to model a system representing a real-time stock feed. The system needed to query the current, maximum, and minimum price of a stock at any given time. The stock price feed was a List<List<Integer>>, and the list could be updated to correct any past wrong records.

Given n routers, represented by their x, y coordinates and a transmission range R for each router, find if a message can be sent from a given source router to a given destination.