Which of the following is an advantage of using an internal database? A. Data always remains current in internal databases. B. Highly sophisticated equipment and techniques are not required for maintaining internal databases. C. Internal databases can be accessed more quickly and cheaply than other information sources. D. Internal databases require less maintenance efforts. E. Information obtained from internal databases is almost always sufficient for making marketing decisions. 2 points

One of your customers wants you to build a personal server that he can use in his home. one of his concerns is making sure he has at least one backup of their data stored on the server in the event that a disk fails. you have decided to back up his data using raid. since this server is for personal use only, the customer wants to keep costs down. therefore, he would like to keep the number of drives to a minimum. which of the following raid systems would best meet the customer's specifications? a. raid 0 b. raid 1 c. raid 5 d. raid 10