DBMS-Entity Relationship (E-R) Model Questions and Answers

Practice Mode
Showing 10 of 38 questions
Q31
Which data model is independent of both hardware and DBMS?
  • A External
  • B Internal
  • C conceptual
  • D all of these
Answer: Option D
Q32
A relatonship between the instances of a single entity type is called.
  • A binary relationship
  • B ternary relationship
  • C recursive relationship
  • D none of these
Answer: Option D
Q33
A simple attribute is composed of :
  • A single component with an independent existence.
  • B multiple components, each with an independent existence.
  • C both (a) and (b)
  • D none of these
Answer: Option A
Q34
A composite attribute is composed of:
  • A single component with an independent existence.
  • B multiple components, each with an independent existence
  • C both (a) and (b)
  • D none of these
Answer: Option B
Q35
What are the components of E-R model?
  • A entity
  • B attribute
  • C relationship
  • D all of these.
Answer: Option D
Q36
The attribute composed of a single component with an independent existence is called:
  • A composite attribute
  • B atomic attribute
  • C single-valued attribute
  • D derived attribute
Answer: Option B
Q37
The attribute composed of multiple components, each with an independent existence is called.
  • A composite attribute
  • B simple attribute
  • C single-valued attribute
  • D derived attribute
Answer: Option A
Q38
Which of these express the specific number of entity occurrences associated withone occurrence of the related entity ?
  • A degree of relationship.
  • B connectivity of relationship
  • C cardinality of relationship
  • D none of these.
Answer: Option A

📚 More from Database

← All Topics 🎯 Practice ⏱️ Take Test 🔍 Search
Database
Back to Database
Other Subjects
Questions and Answers for Competitive Exams Various Entrance Test