Which of the following commands is a Data Manipulation Language (DML) statement? MCQ with Answer and Explanation

Question
Which of the following commands is a Data Manipulation Language (DML) statement?
A. RENAME
B. COMMENT
C. TRUNCATE
D. UPDATE
Answer: Option D
Solution (By JKSSB Mock Tests)
UPDATE is a DML statement because it is used to modify existing data values within rows of a database table, rather than modifying the structural schema.
This question belongs to: Computer Database Management System (DBMS)
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Practice More Database Management System (DBMS) Questions

Question #1
Which type of database model organizes data in a tree-like structure?
A. Object-oriented model
B. Hierarchical model
C. Network model
D. Relational model
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Correct Answer: Option B

Explanation:
The hierarchical model arranges data in a parent-child relationship, forming a tree structure.
This question belongs to: Computer Database Management System (DBMS)
Question #2
Which model represents data in the form of tables?
A. Relational model
B. Network model
C. Entity-Relationship model only
D. Hierarchical model
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Correct Answer: Option A

Explanation:
The relational model uses tables (relations) to represent data and relationships.
This question belongs to: Computer Database Management System (DBMS)
Question #3
Which rule state that 'no component of a primary key can accept a NULL value'?
A. Security Integrity Rule
B. Entity Integrity Rule
C. Domain Constraint Rule
D. Referential Integrity Rule
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Correct Answer: Option B

Explanation:
The Entity Integrity Rule states that a primary key column cannot contain NULL values, ensuring each row can be explicitly identified.
This question belongs to: Computer Database Management System (DBMS)
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