A digital marketing quiz could include questions on a variety of topics such as:

Search engine optimization (SEO)

Pay-per-click (PPC) advertising

Social media marketing

Content marketing

Email marketing

Analytics and tracking

E-commerce marketing

Mobile marketing

Video marketing

Influencer marketing

Affiliate marketing

Web design and user experience (UX)

Online reputation management (ORM)

Search engine marketing (SEM)

and more

Each of these topics could have multiple questions, testing the knowledge of the participant on different aspects of digital marketing.