
Understanding Database Concepts
Quiz
•
Computers
•
10th Grade
•
Practice Problem
•
Easy
Akpegi Akpegi
Used 1+ times
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45 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of normalization in a relational database?
To increase data redundancy and decrease data integrity.
To simplify the database structure by merging tables.
To enhance the performance of database queries without changing data structure.
The purpose of normalization is to reduce data redundancy and improve data integrity in a relational database.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Define the first normal form (1NF).
A table is in first normal form (1NF) if it contains repeating groups of data.
A table is in first normal form (1NF) if it has multiple primary keys.
A table is in first normal form (1NF) if it allows null values in all columns.
A table is in first normal form (1NF) if it has a primary key, contains only atomic values, and each record is unique.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is an entity in an Entity-Relationship model?
An entity is a distinct object or thing in the real world that can be identified.
An entity is a process that occurs in the system.
An entity is a collection of attributes that describe a thing.
An entity is a type of relationship between two objects.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do relationships between entities get represented in ER models?
Relationships are shown as squares with dotted lines between entities.
Relationships are represented by circles connecting entities with arrows.
Relationships are depicted using colors to differentiate entities.
Relationships are represented by diamonds connecting entities with lines.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main goal of database access control?
To increase data redundancy and accessibility.
To allow unrestricted access to all users.
To eliminate the need for data backups.
To ensure authorized access and protect data integrity and confidentiality.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain the concept of primary key in a database.
A primary key is used to store large amounts of data in a single record.
A primary key is a unique identifier for a record in a database table, ensuring uniqueness and non-null values.
A primary key is an optional field that can be left blank.
A primary key can be duplicated across records in a table.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are foreign keys used for in relational databases?
Foreign keys are used to create indexes for faster data retrieval.
Foreign keys are used to enforce referential integrity between tables in relational databases.
Foreign keys are used to store large amounts of data in a single table.
Foreign keys are used to define the primary key of a table.
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