The range of all permissible and valid values that an attribute can hold is formally defined as its what? MCQ with Answer and Explanation

The range of all permissible and valid values that an attribute can hold is formally defined as its what?
A. Schema
B. Tuple
C. Domain
D. Relation
Answer: Option C
Solution (By JKExamLibrary)
A Domain is the pool of legal, atomic values from which an attribute can take its value.

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Practice More Database Management System (DBMS) Questions

Question #1
Which SQL command deletes all rows from a table without deleting the structural schema, cannot be rolled back easily in some systems, and does not fire delete triggers?
A. TRUNCATE
B. DROP
C. DELETE
D. REMOVE

Correct Answer: Option A


Explanation:
TRUNCATE is a DDL command that quickly removes all records from a table by deallocating the data pages, bypassing row-level logging and triggers while leaving the table structure intact.

This question belongs to: Computer Database Management System (DBMS)
Question #2
The command to modify existing records in a table is:
A. CHANGE
B. MODIFY
C. ALTER
D. UPDATE

Correct Answer: Option D


Explanation:
UPDATE is the DML command used to modify data in existing rows.

This question belongs to: Computer Database Management System (DBMS)
Question #3
What type of entity cannot be uniquely identified by its own attributes alone and must rely on a relationship with a parent entity?
A. Strong Entity
B. Abstract Entity
C. Weak Entity
D. Associative Entity

Correct Answer: Option C


Explanation:
A Weak Entity is an entity that does not possess its own primary key and depends on an identifying relationship with a strong (owner) entity.

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