5) Which of the following statement(s) is/are TRUE? A. Operational systems must be in place before tactical or strategic information systems can be 3 built. B. Decision support system supports the most fundamental, basic business operations of the organization; as it records every detail of each transaction. C. What-if (Sensitivity) analysis is the study of how the uncertainty in the output of a mathematical system can be apportioned to different sources of uncertainty in its inputs. D. Much of the input information for tactical and strategic systems are produced by operational systems. E. Predictive nature is a characteristic of Decision Support System. 6) Which of the following about operational systems characteristic is/are FALSE? A. Transactions are repetitive, frequent and in high quantities. B. Operational systems produce periodic reports as output, e.g. daily, weekly and monthly reports. C. Reports from operational systems are often used to compare the performance of one period to another period, and give useful feedbacks. D. Operational systems collect, validate, and record data about business transactions as input that affect corporate resources. E. Input data into operational systems are usually highly subjective (personal opinions based on experiences) and their accuracy may be a suspect.