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Download "Selection Operation in Query Processing Study" App: A3 search performs retrieval of multiple records by using a primary index specifying the; MCQ with answers: inequality comparison on a nonkey attribute, equality comparison on a key attribute, inequality comparison on a key attribute, and equality comparison on a nonkey attribute. Study Query Processing Questions and Answers, Apple iBook to download free chapter to develop professional skills.

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MCQ 381: A3 search performs retrieval of multiple records by using a primary index specifying the:

  1. Equality comparison on a key attribute
  2. Inequality comparison on a nonkey attribute
  3. Equality comparison on a nonkey attribute
  4. Inequality comparison on a key attribute

MCQ 382: The process of transforming data into an unreadable form is known as:

  1. Encryption
  2. Modulation
  3. Theft
  4. Forgery

MCQ 383: In an E-R diagram, the attributes of a relationship set is represented by:

  1. Circle
  2. Square
  3. Divided rectangle
  4. Undivided rectangle

MCQ 384: We can choose the tuples to be updated by using a query, as we could for:

  1. Insert
  2. Delete
  3. Both A and B
  4. Retrieval

MCQ 385: After turning off the automatic commit, transactions must be committed or rolled back explicitly using the method:

  1. conn.commit()
  2. conn.setCommit()
  3. conn.getCommit()
  4. conn.setAuto()

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