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Chapter 17: Database Systems Exam Tests

Database Systems MCQs - Chapter 17

Query Optimization Quiz Questions and Answers PDF - 3

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Query Optimization Questions & Answers PDF Download: MCQ Quiz 3

MCQ 11: An option in view maintenance, in which only the affected part of the view is modified is known as

A) Immediate view maintenance
B) Deferred view maintenance
C) Data-view maintenance
D) Incremental view maintenance

MCQ 12: The process of replacement of a nested query by a query with a join is called

A) Correlation
B) Decorrelation
C) Materialization
D) Non-materialization

MCQ 13: The technique chosen by the database system for evaluation of an operation depends on the size of

A) Relation
B) Distribution of columns
C) Distribution of tuples
D) Both A and B

MCQ 14: The term that optimizes subexpressions shared by different expressions in a program is called

A) Multiple subexpression elimination
B) Common subexpression elimination
C) Parametric subexpression elimination
D) Shared subexpression elimination

MCQ 15: Each relational-algebra expression represents a particular sequence of

A) Parameters
B) Differentials
C) Operations
D) Routines

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Query Optimization App (Android & iOS)

Query Optimization App (Android & iOS)

Database Management System App (Android & iOS)

Database Management System App (Android & iOS)

Operating Systems App (Android & iOS)

Operating Systems App (Android & iOS)

Digital Image Processing App (Android & iOS)

Digital Image Processing App (Android & iOS)