eer model concepts

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In UML class diagrams, inheritances that are permitted includes

In UML class diagrams, inheritances that are permitted includes
  • A. single inheritance
  • B. multiple inheritance
  • C. shared schema inheritance
  • D. both a and b
  • Correct Answer: Option D

Entity types, super classes and subclasses are classified as

Entity types, super classes and subclasses are classified as
  • A. ER schema overlapping
  • B. ER schema functions
  • C. ER schema objects
  • D. EER schema constructs
  • Correct Answer: Option D

According to enhanced-entity relationships, association between super class and subclass is as

According to enhanced-entity relationships, association between super class and subclass is as
  • A. super class is subset of subclass
  • B. subclass is subset of super class
  • C. subclass is partial joint of super class
  • D. super class is partial joint of subclass
  • Correct Answer: Option B

Kind of class whose entities belongs to some other data class is called

Kind of class whose entities belongs to some other data class is called
  • A. concrete classes
  • B. abstract classes
  • C. leaf node classes
  • D. template classes
  • Correct Answer: Option A

Type of classes which specifies operations and attributes but corresponding classes are not available are classified as

Type of classes which specifies operations and attributes but corresponding classes are not available are classified as
  • A. abstract classes
  • B. leaf node classes
  • C. overlapping node classes
  • D. shared node classes
  • Correct Answer: Option A