Amazon Interview Question for SDE-3s


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Given a seed URL, the crawler needed to auto-discover the value of the missing fields for a particular record. So if a web page didn't contain the information that I was looking for, the crawler needed to follow outbound links, until the information was found.
It needed to be some kind of crawler-scraper hybrid, because it had to simultaneously follow outbound links and extract specific information from web pages.
The whole thing needed to be distributed, because there were potentially hundreds of millions of URLs to visit.
The scraped data needed to be stored somewhere, most likely in a database.
The crawler needed to work 24/7, so running it on my laptop wasn't an option.
I didn't want it to cost too much in cloud hosting1.
It needed to be coded in Python, my language of choice.

- justhelping September 11, 2019 | Flag Reply


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