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Free "Entity Relationship Diagrams MCQs" App Download (Android & iOS): In E-R diagrams, the discriminator of a strong entity is underlined with a; MCQ with answers: dashed line, double line, no line, and solid line. Practice Database Design and ER Model Questions and Answers, Google e-Book to download free chapter for DBMS online training.

Entity Relationship Diagrams MCQ – Mock Test 220 PDF Download

MCQ 1096: In E-R diagrams, the discriminator of a strong entity is underlined with a:

  1. Double line
  2. Dashed line
  3. Solid line
  4. No line

MCQ 1097: For the long-term online storage of data, the primary medium of storage is:

  1. Optical storage
  2. Cache
  3. Magnetic-disk storage
  4. Flash memory

MCQ 1098: Each transaction is a unit of:

  1. Consistency
  2. Atomicity
  3. Durability
  4. Both A and B

MCQ 1099: If the sort order of a search key is similar to the sort order of a relation, the search key of the index is called:

  1. Clustering index
  2. Primary index
  3. Secondary index
  4. Composite index

MCQ 1100: The movement of data to and from disk relative to the speed of the central processing unit, is:

  1. High
  2. Very High
  3. Slow
  4. Very Slow

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