Data-volume and frequency-of-use statistics are not critical inputs to the physical database design process. True False TRUE ANSWER : ? YOUR ANSWER : ?
Denormalization and clustering can work well to minimize data access time for small records. False True TRUE ANSWER : ? YOUR ANSWER : ?
Distributing the columns of a table into several separate physical records is known as horizontal partitioning. False True TRUE ANSWER : ? YOUR ANSWER : ?
If a denormalization situation exists with a many-to-many or associative binary relationship, which of the following is true? All fields are stored in three relations. All fields are stored in two relations. All fields are stored in four relations. All fields are stored in one relation. TRUE ANSWER : ? YOUR ANSWER : ?
Sequential retrieval on a primary key for sequential file storage has which of the following features? Slow Moderately fast Very fast Impractical TRUE ANSWER : ? YOUR ANSWER : ?
What is the best data type definition for Oracle when a field is alphanumeric and has a length that can vary? NUMBER CHAR LONG VARCHAR2 TRUE ANSWER : ? YOUR ANSWER : ?
The primary goal of physical database design is data processing efficiency. False True TRUE ANSWER : ? YOUR ANSWER : ?
The blocking factor is: a group of fields stored in adjacent memory. attributes grouped together by the same primary key. the number of physical records per page. attributes grouped together by the same secondary key. TRUE ANSWER : ? YOUR ANSWER : ?
It is usually not very important to design the physical database to minimize the time required by users to interact with the information systems. False True TRUE ANSWER : ? YOUR ANSWER : ?
A pointer is a detailed coding scheme recognized by system software for representing organizational data. True False TRUE ANSWER : ? YOUR ANSWER : ?