Home › WordPress UpWork Test Answers On which of the following databases can WordPress be installed by default? By · Tuesday, June 20, 2017 On which of the following databases can WordPress be installed by default? Answers: 1. MySQL 2. Oracle Database 3. Microsoft SQL Server 4. PostgreSQL WordPress UpWork Test Answers GA Gaurav Arora, Digital Media Lead. 10+ years running paid media and tracking for brands in the USA, UK and Canada.