For the chatbot, it is important to focus on the key skills the case evaluates. You need to have an approach that works regardless of domain expertise (see below for the key skills).
I have had several candidates who recently took it and provided some insights as well as BCG consultants who took it 'for fun and calibration.
The format is different from the previous Online Case, however, the types of questions are the same (math, word problems, logical reasoning, chart interpretation). You are asked to solve a business case of a fictional client.
Consequently, you should prepare in a similar fashion. Your counterpart will be a chatbot, who will ask you subsequent questions, which are sometimes related. As you rightly said, the questions are multiple-choice, open format, where you have to write up to 3 lines, as well as a one-minute recorded video answer in the end.
In order to prepare, use existing materials for the Online Case and focus on
- Case math skills
- Chart interpretation skills
- Logical reasoning skills ala GMAT and others
- Top-down communication and synthesis
I copy from my own source:
- The new type of assessment will be online and can be taken from home before the interview rounds
- The test lasts around 30 minutes and has a maximum of 8-10 questions (contrary to 45 minutes and 23 questions of the old format)
- Some open questions instead of single/ multiple-choice questions
- The scoring of answers is unclear as they also contain qualitative elements, however, there are no negative points for wrong answers
- Calculators are allowed
- At the end of the test, there will be a short, roughly 1-minute video recording, in which you will have to explain your recommendations and analytical approach to a fictional client
Let me know if you need help with it.
I have written a longer free article on both types of the Online Case / Potential Test here: https://strategycase.com/bcgs-online-case/