Introduction to Database System An audit trail is the recorded history of operations performed on a file is used to make back-up copies All of the listed here can be used to restore lost information is the recorded history of operations performed on a file is used to make back-up copies All of the listed here can be used to restore lost information ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Batch processing is appropriate if a large computer system is available only a small computer system is available All of these only a few transactions are involved None of these a large computer system is available only a small computer system is available All of these only a few transactions are involved None of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following refers to an entity in which the identifier of one entity includes the identifier of another entity? Weak entity Strong entity ID-independent entity ID-dependent entity Weak entity Strong entity ID-independent entity ID-dependent entity ANSWER DOWNLOAD EXAMIANS APP
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 A data dictionary is a special file that contains the names of all fields in all files the data types of all fields in all files None of these the widths of all fields in all files All of these the names of all fields in all files the data types of all fields in all files None of these the widths of all fields in all files All of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Two files may be joined into a third file if they have a row in common both (b) and (c) they have no records with the same value in the common field they have a field in common None of these they have a row in common both (b) and (c) they have no records with the same value in the common field they have a field in common None of these ANSWER DOWNLOAD EXAMIANS APP
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