Where is the best way to approach hallway usability testing?

1. Which one of the following testing methods refers to hallway testing?
2. What kind of testing is best for usability?

Which one of the following testing methods refers to hallway testing?

Guerrilla testing (also known as hallway usability testing) is a relatively fast and informal way to test ideas, to get high-level feedback, and potentially uncover user experience problems.

What kind of testing is best for usability?

Usability testing can be either qualitative or quantitative. Qualitative usability testing focuses on collecting insights, findings, and anecdotes about how people use the product or service. Qualitative usability testing is best for discovering problems in the user experience.