Database Systems MCQs - Chapter 17
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The Quiz: The operations of theta-join are; "Query Optimization" App APK Download with answers: Conjunctive; Distributive; Commutative; Associative; for associates in computer science. Practice Indexing in DBMS Quiz Questions, download Kindle eBook (Free Sample) to study computer engineering courses.
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The operations of theta-join are
- Distributive
- Conjunctive
- Commutative
- Associative
Histograms can be computed using
- Population
- Average of data
- Sampling
- Hard data
Keeping a materialized view up-to-date with respect to the underlying data is known as
- Deferred maintenance
- Immediate maintenance
- View maintenance
- Data maintenance
Modern database systems provide more direct support for
- Incremental view maintenance
- Data-view maintenance
- Deferred view maintenance
- Immediate view maintenance
The two expressions generate the same set of tuples on every legal database instance, the relational expressions are said to be
- Dependent
- Independent
- Equivalent
- Non-equivalent
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Database & MySQL MCQ with Answers
- Branch of calculus which is based on mathematical logic is classified as
- In a query tree, operations of relational algebra are classified as
- Constraints that are applied on individual tuples and are verified whenever any tuple is modified or new tuple is inserted are called
- In linear hashing, formula used to calculate number of records if blocking factor, loading factor and file buckets are known is as
- First step in designing high level conceptual data model is
Query Optimization MCQ Book Questions
- Construct that a recursive query should not use on recursive view, is
- Mapping cardinalities are useful in describing
- Each database system supporting ODBC provides a/an
- To specify a normal join, using keyword inner is
- A method that uses two independent pieces/processes of information to identify a user is known as