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MCQs

Total Questions : 61 | Page 5 of 7 pages
Question 41.  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?
  1.    Weak entity
  2.    Strong entity
  3.    ID-dependent entity
  4.    ID- independent entity
 Discuss Question
Answer: Option A. -> Weak entity
Question 42.  Which of the following refers to something that can be identified in the users' work environment, something that the users want to track?
  1.    Entity
  2.    Attribute
  3.    Identifier
  4.    Relationship
 Discuss Question
Answer: Option A. -> Entity
Question 43.  In which of the following is a single-entity instance of one type related to many entity instances of another type?
  1.    One-to-One Relationship
  2.    One-to-Many Relationship
  3.    Many-to-Many Relationship
  4.    Composite Relationship
 Discuss Question
Answer: Option B. -> One-to-Many Relationship
Question 44. . 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?
  1.    Supertype entity
  2.    Subtype entity
  3.    Archetype entity
  4.    Instance entity
 Discuss Question
Answer: Option A. -> Supertype entity
Question 45.  Which of the following refers to an entity in which the identifier of one entity includes the identifier of another entity?
  1.    Weak entity
  2.    Strong entity
  3.    ID-dependent entity
  4.    ID-independent entity
 Discuss Question
Answer: Option C. -> ID-dependent entity
Question 46. . An attribute that names or identifies entity instances is a(n):
  1.    entity.
  2.    attribute.
  3.    identifier.
  4.    relationship.
 Discuss Question
Answer: Option C. -> identifier.
Question 47. . In which of the following can many entity instances of one type be related to many entity instances of another type?
  1.    One-to-One Relationship
  2.    One-to-Many Relationship
  3.    Many-to-Many Relationship
  4.    Composite Relationship
 Discuss Question
Answer: Option C. -> Many-to-Many Relationship
Question 48. . Entities of a given type are grouped into a(n):
  1.    database.
  2.    entity class.
  3.    attribute.
  4.    ERD.
 Discuss Question
Answer: Option B. -> entity class.
Question 49. . Properties that describe the characteristics of entities are called:
  1.    entities.
  2.    attributes.
  3.    identifiers.
  4.    relationships.
 Discuss Question
Answer: Option B. -> attributes.
Question 50. . Entities can be associated with one another in which of the following?
  1.    Entities
  2.    Attributes
  3.    Identifiers
  4.    Relationships
 Discuss Question
Answer: Option D. -> Relationships

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