DBMS · ER Model interview questions

1. A.a top-down abstraction splitting an entity into more specific sub-entities
2. B.a bottom-up abstraction combining similar entities into a higher-level parent entity
3. C.a constraint where only some entity instances need to take part in a relationship
4. D.a distinguishable real-world object represented as a rectangle in an ER diagram

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1. A.Entity
2. B.Derived attribute
3. C.Multivalued attribute
4. D.Generalization

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1. A.Entity — a top-down abstraction splitting an entity into more specific sub-entities
2. B.Entity — an attribute whose value is computed from other attributes rather than stored
3. C.Entity — a distinguishable real-world object represented as a rectangle in an ER diagram
4. D.Entity — an entity that cannot be uniquely identified by its own attributes and depends on an owner entity

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1. A.an entity that cannot be uniquely identified by its own attributes and depends on an owner entity
2. B.an association among entities shown as a diamond in an ER diagram
3. C.a constraint where only some entity instances need to take part in a relationship
4. D.a top-down abstraction splitting an entity into more specific sub-entities

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1. A.Weak entity
2. B.Total participation
3. C.Composite attribute
4. D.Relationship

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1. A.Weak entity — an attribute that can hold more than one value for a single entity instance
2. B.Weak entity — a mapping where one entity instance relates to many instances of another
3. C.Weak entity — a constraint requiring every entity instance to take part in a relationship
4. D.Weak entity — an entity that cannot be uniquely identified by its own attributes and depends on an owner entity

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1. A.a mapping where instances on both sides can relate to multiple instances of the other
2. B.a constraint where only some entity instances need to take part in a relationship
3. C.an association among entities shown as a diamond in an ER diagram
4. D.an attribute whose value is computed from other attributes rather than stored

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1. A.Generalization
2. B.Aggregation
3. C.Relationship
4. D.Derived attribute

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1. A.Relationship — an attribute that can hold more than one value for a single entity instance
2. B.Relationship — a top-down abstraction splitting an entity into more specific sub-entities
3. C.Relationship — an association among entities shown as a diamond in an ER diagram
4. D.Relationship — an abstraction treating a relationship and its entities as a single higher-level entity

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1. A.an attribute whose value is computed from other attributes rather than stored
2. B.a top-down abstraction splitting an entity into more specific sub-entities
3. C.an attribute that can be subdivided into smaller meaningful sub-attributes
4. D.a mapping where one entity instance relates to many instances of another

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1. A.Partial participation
2. B.Generalization
3. C.Composite attribute
4. D.One-to-many relationship

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1. A.Composite attribute — a constraint requiring every entity instance to take part in a relationship
2. B.Composite attribute — a top-down abstraction splitting an entity into more specific sub-entities
3. C.Composite attribute — an abstraction treating a relationship and its entities as a single higher-level entity
4. D.Composite attribute — an attribute that can be subdivided into smaller meaningful sub-attributes

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1. A.an attribute that can hold more than one value for a single entity instance
2. B.an association among entities shown as a diamond in an ER diagram
3. C.a distinguishable real-world object represented as a rectangle in an ER diagram
4. D.an attribute whose value is computed from other attributes rather than stored

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1. A.Generalization
2. B.One-to-many relationship
3. C.Many-to-many relationship
4. D.Multivalued attribute

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1. A.Multivalued attribute — a mapping where instances on both sides can relate to multiple instances of the other
2. B.Multivalued attribute — an attribute that can hold more than one value for a single entity instance
3. C.Multivalued attribute — an attribute whose value is computed from other attributes rather than stored
4. D.Multivalued attribute — an abstraction treating a relationship and its entities as a single higher-level entity

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1. A.a top-down abstraction splitting an entity into more specific sub-entities
2. B.an attribute whose value is computed from other attributes rather than stored
3. C.an attribute that can be subdivided into smaller meaningful sub-attributes
4. D.a constraint where only some entity instances need to take part in a relationship

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1. A.Partial participation
2. B.Specialization
3. C.Relationship
4. D.Derived attribute

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1. A.Derived attribute — a distinguishable real-world object represented as a rectangle in an ER diagram
2. B.Derived attribute — an attribute whose value is computed from other attributes rather than stored
3. C.Derived attribute — a constraint requiring every entity instance to take part in a relationship
4. D.Derived attribute — an attribute that can hold more than one value for a single entity instance

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1. A.an attribute that can hold more than one value for a single entity instance
2. B.a mapping where one entity instance relates to many instances of another
3. C.an association among entities shown as a diamond in an ER diagram
4. D.an entity that cannot be uniquely identified by its own attributes and depends on an owner entity

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1. A.Total participation
2. B.One-to-many relationship
3. C.Aggregation
4. D.Entity

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1. A.One-to-many relationship — an entity that cannot be uniquely identified by its own attributes and depends on an owner entity
2. B.One-to-many relationship — an attribute whose value is computed from other attributes rather than stored
3. C.One-to-many relationship — a mapping where one entity instance relates to many instances of another
4. D.One-to-many relationship — a distinguishable real-world object represented as a rectangle in an ER diagram

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1. A.a constraint requiring every entity instance to take part in a relationship
2. B.a mapping where instances on both sides can relate to multiple instances of the other
3. C.a constraint where only some entity instances need to take part in a relationship
4. D.an entity that cannot be uniquely identified by its own attributes and depends on an owner entity

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1. A.Relationship
2. B.Entity
3. C.Many-to-many relationship
4. D.Specialization

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1. A.Many-to-many relationship — a top-down abstraction splitting an entity into more specific sub-entities
2. B.Many-to-many relationship — a bottom-up abstraction combining similar entities into a higher-level parent entity
3. C.Many-to-many relationship — an abstraction treating a relationship and its entities as a single higher-level entity
4. D.Many-to-many relationship — a mapping where instances on both sides can relate to multiple instances of the other

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1. A.a bottom-up abstraction combining similar entities into a higher-level parent entity
2. B.an association among entities shown as a diamond in an ER diagram
3. C.a top-down abstraction splitting an entity into more specific sub-entities
4. D.a constraint requiring every entity instance to take part in a relationship

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1. A.Total participation
2. B.Entity
3. C.Generalization
4. D.Composite attribute

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1. A.Generalization — a constraint requiring every entity instance to take part in a relationship
2. B.Generalization — an attribute that can hold more than one value for a single entity instance
3. C.Generalization — a distinguishable real-world object represented as a rectangle in an ER diagram
4. D.Generalization — a bottom-up abstraction combining similar entities into a higher-level parent entity

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1. A.a top-down abstraction splitting an entity into more specific sub-entities
2. B.an abstraction treating a relationship and its entities as a single higher-level entity
3. C.a mapping where one entity instance relates to many instances of another
4. D.a mapping where instances on both sides can relate to multiple instances of the other

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1. A.Derived attribute
2. B.Many-to-many relationship
3. C.Specialization
4. D.One-to-many relationship

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1. A.Specialization — an attribute that can hold more than one value for a single entity instance
2. B.Specialization — a mapping where instances on both sides can relate to multiple instances of the other
3. C.Specialization — a top-down abstraction splitting an entity into more specific sub-entities
4. D.Specialization — a distinguishable real-world object represented as a rectangle in an ER diagram

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