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Questions and Answers
What do we call structured data types in the context of data processing?
What do we call structured data types in the context of data processing?
- Persons and places
- Numbers and texts (correct)
- Images and videos
- Dates and documents
In a database system environment, what does the term 'entity' refer to?
In a database system environment, what does the term 'entity' refer to?
- Numbers or texts
- Hardware or software
- People, places, things, or events (correct)
- Images or videos
What is the purpose of a database system in relation to data?
What is the purpose of a database system in relation to data?
- Secure data transmission
- Increase knowledge using processed data (correct)
- Produce optical discs for storage
- Create unstructured data formats
Which of the following is NOT one of the basic building blocks of data models?
Which of the following is NOT one of the basic building blocks of data models?
How is a One-to-Many Relationship defined?
How is a One-to-Many Relationship defined?
What represents an association among entities in a data model?
What represents an association among entities in a data model?
What is the process of defining one or more subtypes of the supertype and forming supertype/subtype relationships?
What is the process of defining one or more subtypes of the supertype and forming supertype/subtype relationships?
Which rule specifies that each entity instance of the supertype must be a member of some subtype in the relationship?
Which rule specifies that each entity instance of the supertype must be a member of some subtype in the relationship?
In the context of employees, which group would likely have the attribute 'Stock Option'?
In the context of employees, which group would likely have the attribute 'Stock Option'?
Which is a type of constraint that addresses whether an instance of the supertype must also be a member of at least one subtype?
Which is a type of constraint that addresses whether an instance of the supertype must also be a member of at least one subtype?
What is the direct reverse process of generalization in entity modeling?
What is the direct reverse process of generalization in entity modeling?
If an entity is either an outpatient or a resident patient, it adheres to which rule?
If an entity is either an outpatient or a resident patient, it adheres to which rule?
What does the double line extending from PATIENT entity type to the circle indicate?
What does the double line extending from PATIENT entity type to the circle indicate?
In the example provided, what are the subtypes of the entity type PART?
In the example provided, what are the subtypes of the entity type PART?
What does the Disjoint Rule specify in a data model?
What does the Disjoint Rule specify in a data model?
What is a subtype discriminator in an ER diagram?
What is a subtype discriminator in an ER diagram?
Why is MOTORCYCLE not represented as a subtype of VEHICLE in the data model?
Why is MOTORCYCLE not represented as a subtype of VEHICLE in the data model?
What does the partial specialization rule signify in an ER diagram?
What does the partial specialization rule signify in an ER diagram?
To declare a variable as a record based on a specific table's structure in PL/SQL, which syntax should be used?
To declare a variable as a record based on a specific table's structure in PL/SQL, which syntax should be used?
What is the primary purpose of using explicit cursors in PL/SQL?
What is the primary purpose of using explicit cursors in PL/SQL?
What is the function of context areas and cursors in PL/SQL?
What is the function of context areas and cursors in PL/SQL?
What distinguishes PL/SQL records from rows in a database table?
What distinguishes PL/SQL records from rows in a database table?
Which of the following is true about user-defined records in PL/SQL?
Which of the following is true about user-defined records in PL/SQL?
What is the starting keyword to define a record structure in PL/SQL?
What is the starting keyword to define a record structure in PL/SQL?
Which PL/SQL feature allows you to nest loops to multiple levels?
Which PL/SQL feature allows you to nest loops to multiple levels?
What is the purpose of the %ROWTYPE attribute in PL/SQL?
What is the purpose of the %ROWTYPE attribute in PL/SQL?
Why is it important to distinguish between an implicit and an explicit cursor in PL/SQL?
Why is it important to distinguish between an implicit and an explicit cursor in PL/SQL?
What is the primary purpose of declaring a cursor and manipulating it in a FOR loop in PL/SQL?
What is the primary purpose of declaring a cursor and manipulating it in a FOR loop in PL/SQL?
Which of the following is NOT a way to define fields in a PL/SQL record?
Which of the following is NOT a way to define fields in a PL/SQL record?
In PL/SQL, what type of data items are stored as fields in a record?
In PL/SQL, what type of data items are stored as fields in a record?
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