Database Systems Practice Test 179

Entity Relationship Model Quiz PDF: Questions and Answers - 179

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Entity Relationship Model Questions and Answers PDF Download: Quiz 179

MCQ 891: A set of entities of the same type that share the same properties, or attributes, is known to be

A) Entity group

B) Grouped entities

C) Entity set

D) Sampled entities

MCQ 892: Buffering is done by

A) Operating system

B) Database system

C) Disk controller

D) Both A and B

MCQ 893: The generalization in which the same entity can belong to more than one lower-level entity set within a single generalization, is known to be

A) Disjointness constraint

B) Overlapping constraint

C) Completeness constraint

D) Concurrency constraint

MCQ 894: The specified role must have been granted to the user, else the set role statement

A) Executed

B) Accepts

C) Passes

D) Fails

MCQ 895: A data-loss in a disk block can be in result of

A) Head crash

B) Sector crash

C) Failure in data-transfer

D) Both A and C

Database Systems Exam Prep Tests

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Decomposition using Functional Dependencies MCQs

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Constraints in DBMS MCQs

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Modification of Database MCQs

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