Interviewer: Why didn't you want to use more than one javascript framework at a time?
Me: Ah, that can cause some compatibility issues.
Interviewer (looking at me like I am crazy): What kind of incompatibility issues arose?
Me (shocked): Um... (hesitates for five seconds) sorry I am blanking.
Interviewer: That's ok. No worries.
Me: Ah, the pagination was loading slowly due to the way the data display library we were using was communicating with the server so we ended up using a native Spring Boot solution instead.
(five week interview process failed over a five second hesitation, so don't be nervous)