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.

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 12 of 21

Explore more Topics under DBMS

01

DBMS Basics

02

Data Models

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The Entity Relationship Approach

04

Relational Databases

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Relational Algebra

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Normalization

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Storage and File Structures

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Indexing and Hashing

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Transactions

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Concurrency Control

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Recovery System

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Distributed Databases

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SQL

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Advanced SQL

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SQL Queries,Constraints and Triggers

Q111.

What is the function of the equi-width histogram?

Adjusts boundaries of the ranges such that each range has the same number of values

Divides range of values into equal sized ranges

Divides the range of values into ideally sized ranges

Does not divide the range of values.

Discuss

Answer: (b).Divides range of values into equal sized ranges

Q112.

What kind of a sample must be used for statistical analysis?

A random sample

A sample having excessive representation of a relation

A sample having suppressive representation of a relation

None of the mentioned

Discuss

Answer: (a).A random sample

Q113.

The ________ SQL command generates statistics on a particular relation

Statistic

Analyze

Modify

Runstats

Discuss

Answer: (b).Analyze

Q114.

The union of all records satisfying the individual simple conditions Oi is called as ________

Conjunctive selection

Disjunctive selection

Negation

None of the mentioned

Discuss

Answer: (b).Disjunctive selection

Q115.

The intersection of all records satisfying the individual simple conditions Oi is called as ________

Conjunctive selection

Disjunctive selection

Negation

None of the mentioned

Discuss

Answer: (a).Conjunctive selection

Q116.

State true or false: Estimation of the size of the result of a join is not possible

True

False

May be

Can't say

Discuss

Answer: (b).False

Q117.

Size estimation can be done for which of the following processes?

Projection

Aggregation

Set operation

All of the mentioned

Discuss

Answer: (d).All of the mentioned

Q118.

The size of a _____ is simply V(A,r) where r is the relation and A is a distinct value

Projection

Outer join

Aggregation

Inner join

Discuss

Answer: (c).Aggregation

Q119.

A ________ explores the space of all query evaluation plans that are equivalent to a given query.

Cost based optimizer

Space based optimizer

Time based optimizer

None of the mentioned

Discuss

Answer: (a).Cost based optimizer

Q120.

What is the disadvantage of cost based optimizers?

It is too expensive

It is inefficient in producing results

It does not perform the desired function

None of the mentioned

Discuss

Answer: (a).It is too expensive

Page 12 of 21

Welcome to the Data Storage and Querying MCQs Page

Data Storage and Querying MCQs | Page 12 of 21

Explore more Topics under DBMS

DBMS Basics

Data Models

The Entity Relationship Approach

Relational Databases

Relational Algebra

Normalization

Storage and File Structures

Indexing and Hashing

Transactions

Concurrency Control

Recovery System

Distributed Databases

SQL

Data Warehousing and Data Mining

RDBMS

Advanced SQL

SQL Queries,Constraints and Triggers

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