People
Infra
Growth & Broadcast
WA History
100

Current Engineering Director who used to be a Software Engineer at WhatsApp

Alan Kao

100

Which of the following is NOT a WhatsApp Infra service?
A. irepd
B. residb
C. iactd
D. aboutd

D. aboutd

100

The first WhatsApp Channel that hit a million followers

Real Madrid FC

100

WhatsApp was originally not a messaging app, it started out as this..

An app that shows status updates of your phone's contacts

200

Which of the following is NOT a Remote employee?
A. Will Cathcart
B. Mikhail Vorontsov
C. Dino Distefano
D. Robby Andrews

C. Dino Distefano

200

WhatsApp experienced the largest traffic spike ever in its history during this global event.

2022 FIFA World Cup Final
200

Which of the following features are not supported on WhatsApp Status?
A. Caption
B. Playback Music
C. Avatars
D. Location Pin

B. Playback Music

200

Location of the very first WhatsApp office

Mountain View, California

300

Out of the following, who is NOT a Data Scientist?
A. Xin Yang
B. Jason Ament
C. Jamie Wong
d. Dror Guldin

A. Xin Yang

300

This media message type is always auto-downloaded

PTT

300

What is WhatsApp’s average daily SMS OTP send volume?
A. 1-5M sends/day
B. 5-10M sends/day
C. 15-20M sends/day
D. 30-35M sends/day

C. 15-20M sends/day

300

This open source project is the reason WhatsApp uses Erlang

ejabberd

400

Which of the following pre-acquisition employees wrote large parts of Registration Infra?
A. Rick Reed
B. Richard Russo
C. Anton Larvik
D. Alexander Shturm

B. Richard Russo

400

Peak concurrently connected devices to WhatsApp Infrastructure (including Armadillo) over the past 30 days
A. 100M
B. 400M
C. 600M
D. 1100M

D. 1100M

400
WhatsApp does not have primacy (>90% reach) in this country yet

A. India
B. Saudi Arabia
C. Peru
D. Netherlands

A. India

400

iOS feature released in 2009 led to the evolution of WA into a messaging app

Push Notifications

500

Out of the following IC turned EMs who has the highest all-time diff count?
A. Tarang
B. Luka
C. Jiafei
D. Sabari

D. Sabari

500

Approximately how many servers power WhatsApp's infra?
A. 38,000
B. 54,000
C. 67,000
D. 82,000

C. 67,000

500

Average time spent on WhatsApp per day by our DAUs.
A. Less than 10 minutes
B. 10-20 minutes
C. 20-30 minutes
D. 30-40 minutes

D. 30-40 minutes

500

This VC firm led the Series A investment in WhatsApp in April 2011

Sequoia Capital