What is an entity in an Entity-Relationship model?

DBMS Quiz 4CSE1 2025 LAB-4

Quiz
•
Computers
•
12th Grade
•
Medium
Sharfuddin Mohammed
Used 1+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An entity is a random collection of data without any specific attributes.
An entity is a type of relationship between two objects.
An entity is a process that describes how data is manipulated.
An entity is a distinct object or thing in the real world that can be identified and has attributes.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Define the term 'relationship' in the context of ER diagrams.
A relationship in ER diagrams is a type of entity.
A relationship in ER diagrams represents the association between entities.
A relationship in ER diagrams is a graphical representation of data storage.
A relationship in ER diagrams defines the attributes of an entity.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of normalization in database design?
To increase data duplication for faster access.
To simplify complex queries by merging tables.
The purpose of normalization is to reduce data redundancy and improve data integrity.
To enhance the visual representation of data in reports.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain the difference between primary key and foreign key.
A primary key is always a string, while a foreign key is always an integer.
A primary key is used for indexing, while a foreign key is used for sorting records.
A primary key can be duplicated across tables, while a foreign key cannot.
A primary key uniquely identifies a record in a table, while a foreign key links to a primary key in another table.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of a composite key in a database?
A composite key is used to encrypt data in a database.
The role of a composite key in a database is to uniquely identify a record using multiple columns.
A composite key is a single column that can be used to identify records.
A composite key is a type of index that speeds up database queries.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
List and explain any two types of data integrity constraints.
Check Constraint
Primary Key Constraint, Foreign Key Constraint
Unique Key Constraint
Not Null Constraint
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does relational algebra differ from SQL?
Relational algebra is a theoretical framework; SQL is a practical implementation with a specific syntax.
Relational algebra is used for data visualization; SQL is used for data storage.
Relational algebra requires a database connection; SQL does not.
Relational algebra is a programming language; SQL is a query language.
Create a free account and access millions of resources
Similar Resources on Quizizz
12 questions
Câu hỏi về SQL

Quiz
•
11th Grade - University
11 questions
1.3.2. Databases

Quiz
•
12th Grade
15 questions
RDBMS & SQL QUERIES

Quiz
•
12th Grade
10 questions
Understanding Cybersecurity

Quiz
•
5th Grade - Professio...
12 questions
Intro to Databases

Quiz
•
12th Grade - University
10 questions
PF 3.06 Lifelong Employment

Quiz
•
9th - 12th Grade
15 questions
T Level OccSpec 4.3 Databases

Quiz
•
12th Grade
11 questions
@tbinh1768/TIN ĐS HK1

Quiz
•
11th Grade - University
Popular Resources on Quizizz
25 questions
Equations of Circles

Quiz
•
10th - 11th Grade
30 questions
Week 5 Memory Builder 1 (Multiplication and Division Facts)

Quiz
•
9th Grade
33 questions
Unit 3 Summative - Summer School: Immune System

Quiz
•
10th Grade
10 questions
Writing and Identifying Ratios Practice

Quiz
•
5th - 6th Grade
36 questions
Prime and Composite Numbers

Quiz
•
5th Grade
14 questions
Exterior and Interior angles of Polygons

Quiz
•
8th Grade
37 questions
Camp Re-cap Week 1 (no regression)

Quiz
•
9th - 12th Grade
46 questions
Biology Semester 1 Review

Quiz
•
10th Grade