SRE and DevOps fundamentals sample question with answer 123

Question:
John Allspaw delivered his "10+Deploys Per Day–Dev and Ops Cooperation at Flickr" presentation in 2009 at the _____.

1. Velocity Conference
2. DevOpsDays conference
3. DevOps Enterprise Summit
4. Etsy’s deploy to production meeting

Answer:
A - is the correct answer. John Allspaw delivered his famous "10+ Deploys per day – Dev and Ops Cooperation at Flickr" presentation at the 2009 Velocity Conference