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Database Management System MCQs – Practice Test 2 (Chapter 12)

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The "Relational Data Model and Database Constraints MCQ" App Download (Android & iOS): In the data model schemas, the constraints that are can not be expressed directly are classified as; MCQ with answers: semantic constraints, application based constraints, and business rules. Practice Constraints in SQL Quiz Questions, download Apple Book (Free Chapter) to improve programming skills.

Relational Data Model & Database Constraints MCQ – Practice Test 2 PDF Download

MCQ 6: In a relation schema, each key of schema having more than one key is classified as:

  1. candidate key
  2. super key
  3. simple key
  4. parallel key

MCQ 7: In the data model schemas, the constraints that are can not be expressed directly are classified as:

  1. application based constraints
  2. semantic constraints
  3. business rules
  4. all of above

MCQ 8: The cardinality in relational data model is considered as:

  1. total number of values
  2. limited number of values
  3. two numbers from set
  4. three numbers from set

MCQ 9: The constraint violated when the given value of attribute is not included in the corresponding domain is:

  1. domain constraint
  2. attribute constraint
  3. key constraint
  4. lock constraint

MCQ 10: If two or more constraints are violated by using insert operation then by default the:

  1. insert is accepted
  2. insert is rejected
  3. insertion permanently blocked
  4. none of above

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