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Database Systems MCQs – Mock Test 144

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Free "Database Systems MCQs" App Android & iOS with MCQ: When an entity in set B is associated with at most one entity in set A, the cardinality is of type; with answers: one-to-one, one-to-many, all-to-all, and many-to-many to improve online coursework. Practice Database Design and ER Model Questions and Answers, Google e-Book to download free chapter to gain digital competence.

Constraints in DBMS MCQ – Mock Test 144 PDF Download

MCQ 716: When an entity in set B is associated with at most one entity in set A, the cardinality is of type:

  1. One-to-many
  2. One-to-one
  3. Many-to-many
  4. All-to-all

MCQ 717: For a referential-integrity constraint to make sense, the primary key must be compatible sets of:

  1. Tuples
  2. Relation
  3. Instances
  4. Attributes

MCQ 718: Declaring an attribute to be of a particular domain acts as a:

  1. Constraint
  2. Definition
  3. Assert
  4. Reference

MCQ 719: Query languages used in practice includes:

  1. Elements
  2. Fields
  3. Instances
  4. Tuples

MCQ 720: For the elimination of duplicates, we use the keyword DISTINCT after the clause:

  1. Select
  2. From
  3. Where
  4. IN

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