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    data modeling with er model




    1).
    Which of the following indicates the maximum number of entities that can be involved in a relationship?
    A   Minimum cardinality   
    B   Maximum cardinality   
    C   ERD   
    D   Greater Entity Count (GEC)   
    ANS: B - Maximum cardinality

    No answer description available for this question

    2).
    Which type of entity cannot exist in the database unless another type of entity also exists in the database, but does not require that the identifier of that other entity be included as part of its own identifier?
    A   Weak entity   
    B   Strong entity   
    C   ID-dependent entity   
    D   ID- independent entity   
    ANS: A - Weak entity

    No answer description available for this question

    3).
    In a one-to-many relationship, the entity that is on the one side of the relationship is called a(n) ________ entity.
    A   parent   
    B   child   
    C   instance   
    D   subtype   
    ANS: A - parent

    No answer description available for this question

    4).
    Which type of entity represents an actual occurrence of an associated generalized entity?
    A   Supertype entity   
    B   Subtype entity   
    C   Archetype entity   
    D   Instance entity   
    ANS: D - Instance entity

    No answer description available for this question

    5).
    A recursive relationship is a relationship between an entity and ________ 
    A   itself   
    B   a subtype entity   
    C   an archetype entity   
    D   an instance entity   
    ANS: A - itself

    No answer description available for this question

    6).
    Which of the following indicates the minimum number of entities that must be involved in a relationship?
    A   Minimum cardinality   
    B   Maximum cardinality   
    C   ERD   
    D   Greater Entity Count (GEC)   
    ANS: A - Minimum cardinality

    No answer description available for this question

    7).
    Which of the following refers to something that can be identified in the users' work environment, something that the users want to track?
    A   Entity   
    B   Attribute   
    C   Identifier   
    D   Relationship   
    ANS: A - Entity

    No answer description available for this question

    8).
    In which of the following is a single-entity instance of one type related to many entity instances of another type?
    A   One-to-One Relationship   
    B   One-to-Many Relationship   
    C   Many-to-Many Relationship   
    D   Composite Relationship   
    ANS: B - One-to-Many Relationship

    No answer description available for this question

    9).
    Which of the following refers to an entity in which the identifier of one entity includes the identifier of another entity?
    A   Weak entity   
    B   Strong entity   
    C   ID-dependent entity   
    D   ID-independent entity   
    ANS: C - ID-dependent entity

    No answer description available for this question

    10).
    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?
    A   Supertype entity   
    B   Subtype entity   
    C   Archetype entity   
    D   Instance entity   
    ANS: A - Supertype entity

    No answer description available for this question