Explain the concepts of database entities and attributes.
What will be an ideal response?
An entity is something (such as a person, object, or event) of importance to the business or organization. When an entity is something that a business or an organization wants to store data about in a database system, it typically becomes a database table. The characteristics of an entity are called attributes. For instance, if a business collects data about customers, then Customer is an entity. Possible Customer attributes are last name, first name, phone number, address, and so forth. Attributes typically become fields in the entity's database table.
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A. server-based application B. newsgroup application C. Usenet application D. cell phone
What are the advantages of RAID 5 over RAID 1?
A. The recovery/rebuild time on RAID 5 would be much longer than on RAID 1. Recalculation of the lost data is necessary in RAID 1. B. The recovery/rebuild time on RAIDÂ 1 would be much longer than on RAID 5. No recalculation of the lost data is necessary in RAID 1. C. A small amount of storage capacity is lost by storing the parity bits (RAID 5), but it is much less than it would be if the entire array were mirrored (RAID 1). D. A small amount of storage capacity is lost by storing the parity bits (RAID 1), but it is much less than it would be if the entire array were mirrored (RAID 5).