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Welcome to the Data Storage and Querying MCQs Page

Dive deep into the fascinating world of Data Storage and Querying with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Data Storage and Querying, a crucial aspect of DBMS. In this section, you will encounter a diverse range of MCQs that cover various aspects of Data Storage and Querying, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within DBMS.

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Check out the MCQs below to embark on an enriching journey through Data Storage and Querying. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of DBMS.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Data Storage and Querying. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Data Storage and Querying MCQs | Page 13 of 21

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Q121.
A particular sort order is said to be _________ sort order if it could be useful for a later operation.

a.

Interesting

b.

Reusable

c.

Efficient

d.

Good

Discuss
Answer: (a).Interesting
Q122.
The rule that allows transformation of a logical operation to a physical operation is called

a.

Logical equivalence rule

b.

Physical equivalence rule

c.

Memory equivalence rule

d.

None of the mentioned

Discuss
Answer: (b).Physical equivalence rule
Q123.
State true or false: Making multiple copies of the same sub-expressions must be avoided

a.

True

b.

False

c.

May be

d.

Can't say

Discuss
Answer: (a).True
Q124.
Optimizers use __________ to reduce the cost of optimization.

a.

Analyzers

b.

Statistics

c.

Heuristics

d.

Caches

Discuss
Answer: (c).Heuristics
Q125.
The join orders where the right operand of each join is in one of the initial relations are called as ________

a.

Right deep join orders

b.

Left deep join orders

c.

Outer join orders

d.

None of the mentioned

Discuss
Answer: (b).Left deep join orders
Q126.
Caching and reuse of query plans is called as ________

a.

Query caching

b.

Plan caching

c.

Plan memorizing

d.

None of the mentioned

Discuss
Answer: (b).Plan caching
Q127.
What technique is used for the evaluation of a query with a nested sub query?

a.

Caching

b.

Decorrelated evaluation

c.

Correlated evaluation

d.

Time based evaluation

Discuss
Answer: (c).Correlated evaluation
Q128.
The process of replacing a nested query with a query with a join is known as _________

a.

Correlation

b.

Decorrelation

c.

Cache handling

d.

Join replacement

Discuss
Answer: (b).Decorrelation
Q129.
A view whose contents are computed and stored is called as _______

a.

Storage view

b.

Backup view

c.

Materialized view

d.

Advanced view

Discuss
Answer: (c).Materialized view
Q130.
The task of keeping a view up to date with the underlying data is called as ________

a.

View handling

b.

View maintenance

c.

View management

d.

None of the mentioned

Discuss
Answer: (b).View maintenance
Page 13 of 21

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