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Free "Database Keys MCQ" App Download with MCQ: A set of one or more attributes that collectively, allow us to identify uniquely a tuple in the relation, is known as; with answers: unique key, special key, super key, and primary key to strengthen SQL techniques. Practice Database Keys Quiz Questions, download Apple Book (Free Chapter) to achieve DBMS excellence.

Database Keys MCQs PDF Download – Prep Test

MCQ 1: A set of one or more attributes that collectively, allow us to identify uniquely a tuple in the relation, is known as:

  1. Unique key
  2. Special key
  3. Super key
  4. Primary key

MCQ 2: No two tuples in a relation are allowed to have exactly the same value for:

  1. Some attributes
  2. All attributes
  3. Some tuple
  4. All tuples

MCQ 3: Specifying tuples within a given relation, are expressed in terms of the:

  1. Attributes
  2. Variables
  3. Function
  4. Domain

MCQ 4: A superkey may contain extraneous:

  1. Attributes
  2. Keys
  3. Instances
  4. Entries

MCQ 5: The values of the attribute values of a tuple must be such that they can uniquely identify the:

  1. Instance
  2. Entity
  3. Relation
  4. Tuple

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