Question 1

In the context of databases, what is the process of organizing data to minimize redundancy known as?

Accepted Answer

Normalization

Answer

Optimization

Answer

Denormalization

Answer

Concatenation

Question 2

What is the primary goal of normalization in database design?

Accepted Answer

Minimize data redundancy

Answer

Maximize data redundancy

Answer

Increase data complexity

Answer

Ignore data consistency

Question 3

Which of the following is NOT a benefit of normalization in relational databases?

Accepted Answer

Increased data redundancy

Answer

Improved data integrity

Answer

Simplified data maintenance

Answer

Reduced data redundancy

Question 4

What is the process of transforming complex data structures into a simple and clean database design?

Accepted Answer

Normalization

Answer

Optimization

Answer

Aggregation

Answer

Denormalization

Question 5

Which normal form ensures that all non-key attributes are functionally dependent only on the primary key?

Accepted Answer

Second Normal Form (2NF)

Answer

Third Normal Form (3NF)

Answer

Boyce-Codd Normal Form (BCNF)

Answer

First Normal Form (1NF)

Question 6

Which normal form in database normalization eliminates transitive dependencies?

Accepted Answer

Third Normal Form (3NF)

Answer

First Normal Form (1NF)

Answer

Fourth Normal Form (4NF)

Answer

Second Normal Form (2NF)

Question 7

Which normal form eliminates partial dependencies by ensuring that all non-key attributes are fully functionally dependent on the entire primary key?

Accepted Answer

Second Normal Form (2NF)

Answer

Boyce-Codd Normal Form (BCNF)

Answer

Third Normal Form (3NF)

Answer

First Normal Form (1NF)

Question 8

Which normalization anomaly occurs when a modification of a specific data value requires changes to multiple rows of a table?

Accepted Answer

Update anomaly

Answer

Deletion anomaly

Answer

Selection anomaly

Answer

Insertion anomaly

Question 9

What normalization anomaly involves the inability to add certain data to the database without adding other unrelated data?

Accepted Answer

Insertion anomaly

Answer

Selection anomaly

Answer

Update anomaly

Answer

Deletion anomaly

Question 10

Which normalization anomaly occurs when the deletion of a specific row in a table results in the loss of other unrelated data?

Accepted Answer

Deletion anomaly

Answer

Selection anomaly

Answer

Insertion anomaly

Answer

Update anomaly

Question 11

In database normalization, what is the process of organizing a database into tables and columns to minimize redundancy and dependency?

Accepted Answer

Normalization

Answer

Denormalization

Answer

Aggregation

Answer

Optimization

Question 12

What is a candidate key in the context of database normalization?

Accepted Answer

A candidate key is a minimal subset of attributes that can uniquely identify a tuple in a relation.

Answer

A key that is used only for indexing purposes.

Answer

A key that is chosen arbitrarily by the database administrator.

Answer

A key that is non-unique and may result in duplicates in the database.

Question 13

What is the primary goal of database normalization?

Accepted Answer

The primary goal of database normalization is to reduce data redundancy and improve data integrity.

Answer

The primary goal of database normalization is to eliminate all data from the database.

Answer

The primary goal of database normalization is to complicate data storage for security purposes.

Answer

The primary goal of database normalization is to maximize data duplication for faster retrieval.

Question 14

What normalization form allows a database to be free of repeating groups and ensures that every piece of data is functionally dependent on the primary key?

Accepted Answer

First Normal Form (1NF)

Answer

Fourth Normal Form (4NF)

Answer

Second Normal Form (2NF)

Answer

Third Normal Form (3NF)

Question 15

What is a primary key in a database?

Accepted Answer

A unique key that uniquely identifies each record in a table

Answer

A key that can have duplicate values in a table

Answer

A key that ensures data integrity in a table

Answer

A key used for sorting data in a table

Question 16

What is a foreign key in a database?

Accepted Answer

A field that links one table to another by referencing a primary key

Answer

A key that uniquely identifies each record in a table

Answer

A key used for data encryption in a table

Answer

A key that determines the sort order of records in a table

Question 17

What is a composite key in a database?

Accepted Answer

A key that consists of multiple columns to uniquely identify each record

Answer

A key that is composed of encrypted values in a table

Answer

A key that allows duplicate values in a table

Answer

A key that is used for indexing purposes in a table

Question 18

What is a candidate key in a database?

Accepted Answer

A minimal superkey that uniquely identifies each record in a table

Answer

A key that allows duplicate values in a table

Answer

A key used for data encryption in a table

Answer

A key that determines the sort order of records in a table

Question 19

What is a unique key constraint in a database?

Accepted Answer

A constraint that ensures all values in a column are unique

Answer

A constraint that allows duplicate values in a column

Answer

A constraint that enforces referential integrity between tables

Answer

A constraint that defines sort order for a column

Question 20

What is the purpose of a foreign key constraint in a database?

Accepted Answer

To maintain referential integrity between related tables

Answer

To optimize query performance in a database

Answer

To define the sort order of records in a table

Answer

To enforce uniqueness on a column in a table

Question 21

What type of constraint ensures that a column cannot have NULL values?

Accepted Answer

Not null constraint

Answer

Primary key constraint

Answer

Unique constraint

Answer

Check constraint

Question 22

Which of the following is an example of Domain Integrity in a database?

Accepted Answer

Ensuring that a column only accepts integer values

Answer

Allowing a column to store any type of data

Answer

Disallowing NULL values in a column

Answer

Not enforcing any constraints on data types

Question 23

What concept in database management ensures that every foreign key value matches a primary key value in another table?

Accepted Answer

Referential Integrity

Answer

Normalization

Answer

Entity Integrity

Answer

Domain Integrity

Answer

Data Redundancy

Question 24

In database management, what does Entity Integrity refer to?

Accepted Answer

Ensuring that each row in a table is uniquely identified by a primary key

Answer

Enforcing data type constraints in a database

Answer

Ensuring that foreign key values match primary key values

Answer

Partitioning a database into multiple tables

Answer

Storing redundant data in multiple tables

Question 25

Which of the following is an example of Referential Integrity in a database?

Accepted Answer

Ensuring that a foreign key value in a child table references a valid primary key value in a parent table

Answer

Allowing foreign key values to be NULL in a child table

Answer

Denormalizing the database structure

Answer

Ignoring relationships between tables

Answer

Storing duplicate primary key values in a parent table

Question 26

What does Domain Integrity ensure in a database?

Accepted Answer

Data consistency and accuracy by enforcing constraints on allowable data values in a column

Answer

Preventing unauthorized access to the database through user authentication

Answer

Optimizing query performance by indexing all columns in a table

Answer

Ensuring high availability of the database through replication

Answer

Applying security policies to restrict data access based on user roles

Question 27

Which of the following is an example of a Domain Integrity constraint in a database?

Accepted Answer

Setting a maximum character limit for a text column

Answer

Duplicating primary key values in a table

Answer

Ignoring data type validations for a column

Answer

Allowing NULL values in a required column

Answer

Storing multiple values in a column meant for single entries

Question 28

What is the primary function of Entity Integrity in a database?

Accepted Answer

Ensuring the uniqueness of each row in a table through a primary key

Answer

Preventing NULL values from being inserted in a column

Answer

Maintaining relationships between tables through foreign keys

Answer

Enforcing constraints on the data type of columns

Answer

Managing data redundancy by normalization

Question 29

Which type of integrity constraint in a database ensures that a column only accepts values that fall within a specified range?

Accepted Answer

Domain Integrity

Answer

Entity Integrity

Answer

Data Redundancy

Answer

Referential Integrity

Answer

Normalization

Question 30

What is the purpose of Referential Integrity in a database system?

Accepted Answer

To maintain relationships between tables by ensuring that foreign key values match primary key values

Answer

To set constraints on allowable data values in columns

Answer

To optimize query performance by indexing all columns in a table

Answer

To apply security policies for data access based on user roles

Answer

To ensure the uniqueness of each row in a table through a primary key

Question 31

Which type of integrity constraint in a database ensures that every row in a table is uniquely identified by a primary key?

Accepted Answer

Entity Integrity

Answer

Data Redundancy

Answer

Domain Integrity

Answer

Normalization

Answer

Referential Integrity

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