Wayfair Senior Software Engineer L3 Interview Questions, Process, and Tips

Hackerrank questions (medium level) covering topics of hash map and heaps

Frequently asked question - Coupon category (can be found on LC)

Q1. Automated parking lot (apis, database tables, classes, functions and implementation walkthrough)
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Q1. URL shortener system design
Ans. 
Design a URL shortener system
• Use a unique identifier for each long URL to generate short URL

• Implement a mapping system to redirect short URL to original long URL

• Consider scalability and performance for high traffic volume

• Implement analytics to track usage and performance of short URLs
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I was given a codility test which was of one hour duration.

Q1. Find the non overlapping intervals
Ans. 
Given a list of intervals, find the non-overlapping intervals.
• Sort the intervals based on their start time.

• Iterate through the intervals and keep track of the latest end time.

• If the start time of the current interval is greater than the latest end time, add it to the non-overlapping intervals.

• If the start time of the current interval is less than or equal to the latest end time, skip it as it overlaps with the previous
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Q2. Add two integer strings
Ans. 
To add two integer strings, we can convert them to integers and then add them.
• Convert the strings to integers using parseInt() or Number()

• Add the integers using the + operator

• Convert the result back to a string using toString()
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Q1. Design an automated parking lot having automated lift for parking a vehicle. Main focus was on class diagram and schema design
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Q1. High Level Design of an app similar to Shazam
Ans. 
An app similar to Shazam for identifying music
• Use audio fingerprinting to identify songs

• Integrate with music databases to retrieve song information

• Provide user-friendly interface for displaying song details
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