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I would like to know more about this. Is there a proper book(s)/source(s) that I should follow? I never came across segment trees in my Data Structures class and I have rarely found the need to code one up in my job yet the screening process involved coding a question using segment trees. How do people get to know about these?

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>Is there a proper book(s)/source(s) that I should follow?

You may find these book useful:

Competitive Programming 3 by Felix Halim and Steven Halim.

Competitive Programmer’s Handbook (https://cses.fi/book/index.html)

>I have rarely found the need to code one up in my job

Depending on your job profile, these data structures may not be used at all. But programming puzzles have become the norm for interviews in the industry.

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