Introduction to Database System Keys made up of two or more attributes are called composite keys. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Two files may be joined into a third file if both (b) and (c) they have a field in common they have a row in common they have no records with the same value in the common field None of these both (b) and (c) they have a field in common they have a row in common they have no records with the same value in the common field None of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The different classes of relations created by the technique for preventing modification anomalies are called: functional dependencies. None of these referential integrity constraints. normal forms. functional dependencies. None of these referential integrity constraints. normal forms. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System What name is given to the collection of facts, items of information or data which are related in some way? Directory information Database Information provider Information tree Directory information Database Information provider Information tree ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following is not a restriction for a table to be a relation? The columns must be ordered. The cells of the table must contain a single value. No two rows in a table may be identical. All of the entries in any column must be of the same kind. The columns must be ordered. The cells of the table must contain a single value. No two rows in a table may be identical. All of the entries in any column must be of the same kind. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A computer file contains several records. What does each record contain? Fields Words Bytes Database Fields Words Bytes Database ANSWER DOWNLOAD EXAMIANS APP
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