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

Question
The range of all permissible and valid values that an attribute can hold is formally defined as its what?
A. Tuple
B. Relation
C. Schema
D. Domain
Answer: Option D
Solution (By JKSSB Mock Tests)
A Domain is the pool of legal, atomic values from which an attribute can take its value.
This question belongs to: Computer Database Management System (DBMS)
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Practice More Database Management System (DBMS) Questions

Question #1
What is the result of the SQL query: SELECT * FROM employees;?
A. An empty result
B. Only the first row
C. All rows and all columns from the employees table
D. Only the primary key column
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Correct Answer: Option C

Explanation:
SELECT * retrieves all columns and rows from the specified table.
This question belongs to: Computer Database Management System (DBMS)
Question #2
Which database anomaly describes the necessity to update the exact same data value in multiple independent rows, creating a risk of data inconsistency?
A. Insertion Anomaly
B. Update Anomaly
C. Structural Anomaly
D. Selection Anomaly
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Correct Answer: Option B

Explanation:
An Update Anomaly occurs when data is redundantly duplicated across rows, requiring changes to be made to every copy, risking inconsistencies if any row is missed.
This question belongs to: Computer Database Management System (DBMS)
Question #3
What is a view in a database?
A. An index on a table
B. A virtual table based on the result of a SELECT query
C. A physical table stored on disk
D. A backup of a table
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Correct Answer: Option B

Explanation:
A view is a logical representation of data, derived from one or more tables, but does not store data physically.
This question belongs to: Computer Database Management System (DBMS)
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