Which of the following is not a type of database model? MCQ with Answer and Explanation

Question
Which of the following is not a type of database model?
A. Object-oriented
B. Hierarchical
C. Network
D. Flat-file
Answer: Option D
Solution (By JKSSB Mock Tests)
Flat-file is not a database model; it is a simple file containing records. Hierarchical, Network, Relational, and Object-oriented are database models.
This question belongs to: Computer Database Management System (DBMS)
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Practice More Database Management System (DBMS) Questions

Question #1
Which of the following is a DML statement?
A. UPDATE
B. DROP
C. ALTER
D. CREATE
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Correct Answer: Option A

Explanation:
UPDATE is a Data Manipulation Language (DML) command used to modify existing records in a table. CREATE, ALTER, DROP are DDL.
This question belongs to: Computer Database Management System (DBMS)
Question #2
Which software utility serves as an interface between an application program and the physical database files?
A. Linker
B. Operating System
C. Database Management System (DBMS)
D. Compiler
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Correct Answer: Option C

Explanation:
A Database Management System (DBMS) acts as an interface between application software and the underlying physical database, managing data storage, retrieval, and updates.
This question belongs to: Computer Database Management System (DBMS)
Question #3
What is a composite key in a database?
A. A key that is a single column
B. A key that is always a foreign key
C. A key that references another table
D. A key that is made up of multiple columns
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Correct Answer: Option D

Explanation:
A composite key is a primary key that consists of two or more columns to uniquely identify a row.
This question belongs to: Computer Database Management System (DBMS)
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