These survey-taking activities are a mix of information-gap and opinion-gap activities. Both of these activity types are part of the Task-Based Language Teaching (TBLT) methodology.
Due to the simplicity of the communication required for these activities, they are especially suitable for developing speaking confidence in English language beginners and near-beginners. However, they are also an efficient means of quickly developing the speaking skills needed to participate in more complex communication activities that utilize many of the same vocabulary words and similar basic sentence patterns.