Relational database systems use ________ to ensure that relationships between coupled tables remain consistent
A) intersection relations
B) one-to-one ordering
C) entity-relationship diagrams
D) foreign keys
E) referential integrity rules
E
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After collecting an advance rental fee of $75, you are unable to provide your cli- ent with a rental that suits her. When she requests a refund, upon expiration of her rental contract, you must return
A. nothing, if you provided a list of at least three rentals. B. $50. C. $25. D. $40.
An investor adopts a variable ratio policy of investing in both a high beta mutual fund and a money market fund. Money will be moved from the money market fund to the high beta fund
A) when the high beta fund's value has declined. B) when the high beta fund's value has increased. C) on the same date each year. D) whenever accumulated interest in the money market fund exceeds a specified dollar amount.