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MCQs

Total Questions : 61 | Page 6 of 7 pages
Question 51. . Which of the following is NOT a basic element of all versions of the E-R model?
  1.    Entities
  2.    Attributes
  3.    Relationships
  4.    Primary keys
 Discuss Question
Answer: Option D. -> Primary keys
Question 52. . In which of the following is a single-entity instance of one type of related to a single-entity instance 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 A. -> One-to-One Relationship
Question 53. . In a one-to-many relationship, the entity that is on the many side of the relationship is called a(n) ________ entity.
  1.    parent
  2.    child
  3.    instance
  4.    subtype
 Discuss Question
Answer: Option B. -> child
Question 54. . Which type of entity represents a logical generalization whose actual occurrence is represented by a second, associated entity?
  1.    Supertype entity
  2.    Subtype entity
  3.    Archetype entity
  4.    Instance entity
 Discuss Question
Answer: Option C. -> Archetype entity
Question 55. . Which type of entity has its relationship to another entity determined by an attribute in that other entity called a discriminator?
  1.    Supertype entity
  2.    Subtype entity
  3.    Archetype entity
  4.    Instance entity
 Discuss Question
Answer: Option B. -> Subtype entity
Question 56. . Which of the following is NOT a basic element of all versions of the E-R model?
  1.    Entities
  2.    Attributes
  3.    Relationships
  4.    Primary keys
 Discuss Question
Answer: Option D. -> Primary keys
Question 57. . Which type of entity represents a logical generalization whose actual occurrence is represented by a second, associated entity?
  1.    Supertype entity
  2.    Subtype entity
  3.    Archetype entity
  4.    Instance entity
 Discuss Question
Answer: Option C. -> Archetype entity
Question 58. . 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
Question 59. . Which type of entity has its relationship to another entity determined by an attribute in that other entity called a discriminator?
  1.    Supertype entity
  2.    Subtype entity
  3.    Archetype entity
  4.    Instance entity
 Discuss Question
Answer: Option B. -> Subtype entity
Question 60. . In which of the following is a single-entity instance of one type of related to a single-entity instance 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 A. -> One-to-One Relationship

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