DBMS Introduction to Database Design Questions with Answers

DBMS – Introduction to Database Design is a foundational topic in computer science and is often featured in programming interview questions with answers and campus placement papers. Understanding how to design efficient databases is essential for roles involving software development and data management. Concepts like ER models, normalization, schema design, and relationships form the core of this section. Practicing DBMS questions with answers will help you excel in company-wise technical rounds of Infosys, Cognizant, and Wipro. Strengthen your fundamentals with these Database Design interview questions and answers to prepare effectively for technical interviews.

Showing 10 of 50 questions

Per page:

What is the primary purpose of a database management system?

A Data storage and retrieval
B Network configuration
C Hardware maintenance
D Software development

Answer: Option A

Explanation: DBMS serves as an interface between database and users/applications, enabling data storage, retrieval, and management.

Which of the following is NOT a characteristic of DBMS?

A Data independence
B Data security
C No data redundancy
D Concurrency control

Answer: Option C

Explanation: DBMS provides data independence, security, and concurrency control but doesn't guarantee complete data redundancy elimination.

What is data redundancy in database systems?

A Unnecessary data duplication
B Data encryption
C Data compression
D Data validation

Answer: Option A

Explanation: Data redundancy refers to unnecessary duplication of data in the database, which can lead to inconsistencies.

Which data model represents data as tables?

A Relational model
B Hierarchical model
C Network model
D Object-oriented model

Answer: Option A

Explanation: The relational model organizes data into tables (relations) with rows and columns.

What is an entity in database design?

A Real-world object
B Database table
C SQL query
D Programming function

Answer: Option A

Explanation: An entity is a real-world object or concept that can be distinctly identified and about which data is stored.

What is the purpose of a primary key?

A Unique identification
B Data sorting
C Memory allocation
D Network connection

Answer: Option A

Explanation: A primary key uniquely identifies each record in a table and cannot contain null values.

Which normal form eliminates transitive dependencies?

A Third Normal Form
B First Normal Form
C Second Normal Form
D Boyce-Codd Normal Form

Answer: Option A

Explanation: Third Normal Form (3NF) requires that all attributes depend only on the primary key, eliminating transitive dependencies.

What is data abstraction in DBMS?

A Hiding implementation details
B Data encryption
C Data compression
D Data backup

Answer: Option A

Explanation: Data abstraction hides complex implementation details and shows only essential features to users.

Which SQL command is used to create a database?

A CREATE DATABASE
B MAKE DATABASE
C NEW DATABASE
D BUILD DATABASE

Answer: Option A

Explanation: CREATE DATABASE command is used to create a new database in SQL.

Q10

What is a foreign key?

A References primary key
B Unique identifier
C Data validator
D Index creator

Answer: Option A

Explanation: A foreign key establishes a relationship between two tables by referencing the primary key of another table.

📚 More from Database

← All Topics 🎯 Practice ⏱️ Take Test 🔍 Search

Back to Database

DBMS-Introduction to Database Design Questions and Answers

📚 More from Database

Database

Other Subjects

DBMS-Introduction to Database Design Questions and Answers

📚 More from Database

Database

Other Subjects

Report a Problem