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Database Systems MCQs – Practice Test 10 (Chapter 20)

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Relational Database Design MCQ – Practice Test 10 PDF Download

MCQ 46: An instance of a relation that satisfies all real-world constraints is called a:

  1. Associated instance
  2. Legal instance
  3. Participant instance
  4. Domain instance

MCQ 47: In the symmetric-key encryption technique, the key that is used to decrypt data is known to be:

  1. Public key
  2. Asymmetric key
  3. Private key
  4. Encryption key

MCQ 48: In asymmetric-key encryption, it is extremely difficult for an intruder to infer the private key, even if it has the:

  1. Decryption key
  2. Encrypted data
  3. Public key
  4. Modulation key

MCQ 49: Some variation of E-R diagram, makes it impossible or difficult to specify:

  1. Binary relationship sets
  2. Nonbinary relationship sets
  3. Unary relationship sets
  4. Non -unary relationships

MCQ 50: Boyce-Codd normal form eliminated all the:

  1. Inconsistency
  2. Atomicity
  3. Isolation
  4. Redundancy

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