Database Systems MCQs - Chapter 17
Query Optimization Trivia Questions and Answers PDF - 4
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Query Optimization Questions & Answers PDF Download: MCQ Quiz 4
MCQ 16: The operations of theta-join are
- Distributive
- Conjunctive
- Commutative
- Associative
MCQ 17: Histograms can be computed using
- Population
- Average of data
- Sampling
- Hard data
MCQ 18: Keeping a materialized view up-to-date with respect to the underlying data is known as
- Deferred maintenance
- Immediate maintenance
- View maintenance
- Data maintenance
MCQ 19: Modern database systems provide more direct support for
- Incremental view maintenance
- Data-view maintenance
- Deferred view maintenance
- Immediate view maintenance
MCQ 20: 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 relation schema, each key of schema having more than one key is classified as
- Operation which is used to take union of tuples from the relations
- If matching tuples are not found, the kind of OUTER JOIN operation
- According to enhanced-entity relationships, the association between super class and subclass is as
- Type of data organization which does not allow cross block boundaries is called
Query Optimization MCQ Book Questions
- Construct that a recursive query should not use on the recursive view, is
- Preface that converts the DML statements to normal procedure calls in the
- Relational algebra operation that return rows of the input relation that satisfy
- To provide an environment that is both convenient and efficient for people
- A subquery that uses a correlation name from an outer query is called a
- Solution to improving reliability is to introduce