Introduction to Database System Which type of entity is related to two or more associated entities that each contain specialized attributes that apply to some but not all of the instances of the entity? Archetype entity Instance entity Supertype entity Subtype entity Archetype entity Instance entity Supertype entity Subtype entity ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A tuple is a(n): two dimensional table. key of a table. column of a table. row of a table. two dimensional table. key of a table. column of a table. row of a table. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System An entity is something that can be identified in the user's work environment; something that the users want to track. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A data dictionary is a special file that contains the data types of all fields in all files the widths of all fields in all files the names of all fields in all files None of these All of these the data types of all fields in all files the widths of all fields in all files the names of all fields in all files None of these All of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following is a group of one or more attributes that uniquely identifies a row? Determinant Key Tuple Relation Determinant Key Tuple Relation ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Data encryption techniques are particularly useful for improving data integrity reducing storage space requirements protecting data in data communication systems None of these All of these improving data integrity reducing storage space requirements protecting data in data communication systems None of these All of these ANSWER DOWNLOAD EXAMIANS APP
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