Which type of database model organizes data in a tree-like structure? MCQ with Answer and Explanation

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Which type of database model organizes data in a tree-like structure?

A. Relational model

B. Network model

C. Object-oriented model

D. Hierarchical model

Answer: Option D

Solution (By JKSSB Mock Tests)

The hierarchical model arranges data in a parent-child relationship, forming a tree structure.

This question belongs to: Computer Database Management System (DBMS)

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Question #1

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Which language is used to define the structure of a database, such as creating tables and constraints?

A. DCL

B. DDL

C. TCL

D. DML

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Correct Answer: Option B

Explanation:
Data Definition Language (DDL) is used to define and modify the database schema, including CREATE, ALTER, and DROP statements.

This question belongs to: Computer Database Management System (DBMS)

Question #2

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Which of the following is a valid SQL function to convert a string to uppercase?

A. Both A and C

B. TO_UPPER()

C. UCASE()

D. UPPER()

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Correct Answer: Option A

Explanation:
UPPER() is standard SQL; some DBMS also support UCASE().

This question belongs to: Computer Database Management System (DBMS)

Question #3

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Which of the following is a valid SQL data type for storing large binary data?

A. VARCHAR

B. BLOB

C. TEXT

D. CHAR

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Correct Answer: Option B

Explanation:
BLOB (Binary Large Object) is used for storing large binary data, such as images or files.

This question belongs to: Computer Database Management System (DBMS)

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