7. What is a Data Flow Diagram (DFD)? (2 marks) a. A DFD is a graphical representation of how data flows through a business information system b. A DFD is is a way to structure an organization using different levels of authority and a vertical link, or chain of command, between superior and subordinate levels of the organization C. A DFD is a graphical representation of how data flows through a business information system d. A DFD is a flow chart that represent how data flows in a system 8. What is the external entity used for? (2 marks) a. To show all the external works taking place outside the organisation b. To represent all employees who work out on the field c. To represent source or destination of data that is external to the system d. To represent private event held 9. A process whereby there are only inputs, but no outputs is referred to as a. (2 marks) a. Miracle b. Grey hole c. Black hole d. Data storage endpoint 10. A process whereby there are insufficient inputs to generate the output described is referred to as a .. (2 marks) a. Miracle b. grey hole c. black hole d. data storage endpoint