Performance analysis and tuning is which of the following?
Options: Undertaken one time at the time of a DBMS installation, Undertaken one time at the time of the implementation of a new application, Undertaken as an ongoing part of the backup of a database, Undertaken as an ongoing part of managing a database
Which of the following is(are) true concerning information-system careers?
Options: the primary reason for this increase is the declining cost of hardware, the number of information-system specialists recruited is expected to be greater than any other profession in the 1990s., an information-system career is one of the few area that is recession-proof, both (a) and (b)
Options: a background in systems theory and organization behavior, familiarity with the makeup and inner workings of major application areas such as financial accounting, personnel administration, marketing and sales, operations management, model building, and production control., competence in system tools and methodologies and a practical knowledge of one or more programming and data base languages., All of the above
Options: (A)A family of relational database management systems marketed by IBM (B) Interactive systems that enable decision makers to use databases and models on a computer in order to solve illstructured problems (C) It consists of nodes and branches starting from a single root node. Each node represents a test, or decision. (D) None of these 3
Options: means storing records in contiguous blocks according to a key., Stores records sequentially but uses an index to locate records, uses an index for each key type, has records placed randomly throughout the file