1. True or False - Efficient supply chains work best when demand is unpredictable and characterized by high forecast errors.

2. True or False - An ERP system has multiple databases one particularly for front-office operations like customer service and another for back-office operations such as manufacturing and payroll.

3. True or False - Blockchains used in supply chains are usually publicly accessible to provide ease of access and use.

4. True or False - An increase in freight density will result in a corresponding increase in carbon footprint.