Database Systems MCQs – Practice Test 10 (Chapter 20)

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Relational Database Design MCQ PDF Download – Practice Test 10

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

Associated instance
Legal instance
Participant instance
Domain instance

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

Public key
Asymmetric key
Private key
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:

Decryption key
Encrypted data
Public key
Modulation key

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

Binary relationship sets
Nonbinary relationship sets
Unary relationship sets
Non -unary relationships

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

Inconsistency
Atomicity
Isolation
Redundancy

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