Question 1

True or false: Jan Koum was born in Ukraine and moved to the US as a teenager.

Accepted Answer

True. He was born in a small village near Kyiv in 1976 and immigrated to Mountain View, California at age 16.

Question 2

True or false: Koum co-founded WhatsApp after being rejected for a job at Facebook.

Accepted Answer

True. He applied to Facebook in 2009 but was rejected; he then built WhatsApp, which Facebook later bought for $19 billion.

Question 3

True or false: Koum once worked as a security tester at Yahoo before starting WhatsApp.

Accepted Answer

True. He was an infrastructure engineer at Yahoo for nearly a decade, where he met Brian Acton, his future WhatsApp co-founder.

Question 4

True or false: Jan Koum is a billionaire who never uses social media himself.

Accepted Answer

False. He uses WhatsApp and has a minimal online presence, but he does post occasionally on X (formerly Twitter).

Question 5

True or false: Jan Koum was a college dropout who never finished high school.

Accepted Answer

False. He graduated high school in the US and briefly attended San Jose State University but dropped out to work at Yahoo.

Question 6

True or false: Koum’s mother sold homemade jewelry to support the family after they moved to the US.

Accepted Answer

True. His mother worked as a babysitter and sold handmade goods, while his father stayed in Ukraine due to health issues.

Question 7

True or false: Koum’s favorite childhood book inspired WhatsApp’s green icon.

Accepted Answer

False. The green icon was chosen for its simplicity and contrast; no book connection exists—this is a fabricated story.

Question 8

True or false: Jan Koum’s first name is actually a pseudonym he adopted in the US.

Accepted Answer

False. His birth name is Jan Koum; no pseudonym—though his surname is sometimes misspelled as 'Koum' from Ukrainian 'Кум'.

Jan Koum Trivia Questions