NBA Owner Vivek Ranadive -- Adorably Clueless About Rap ... 'Tyga? French Something? I Don't Know Them'

You gotta respect blunt honesty -- like when Sacramento Kings owner Vivek Ranadive says he's proud that his daughter is working with top tier rap talent ... even if he doesn't know who they are.

This video is great ... Vivek is clearly super supportive of his daughter Anjali's aspiring singing career -- but tells TMZ Sports he has a hard time keeping up with some of the huge stars who are working with her in the studio.

"Tyga? French something? I don't really know any of them," Vivek playfully admits.

This guy is awesome -- and what makes him even cooler? He's currently training for a H-O-R-S-E showdown with Shaquille O'Neal ... by practicing on the custom court at his mansion.

We also ask Vivek -- reported net worth $700 million -- the best piece of business advice he ever got.