What is 'data about data' commonly referred to in a Database Management System? MCQ with Answer and Explanation

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What is 'data about data' commonly referred to in a Database Management System?

A. Sub-data

B. Metadata

C. Hyper-data

D. Directory

Answer: Option B

Solution (By JKExamLibrary)

Metadata is defined as data about data. It describes the structure, constraints, data types, and properties of the actual data stored in a database.

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 valid SQL function to convert a string to uppercase?

A. UPPER()

B. TO_UPPER()

C. Both A and C

D. UCASE()

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Correct Answer: Option C

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

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

Question #2

Which aggregate function is used to count the number of rows in a table?

A. COUNT

B. MAX

C. AVG

D. SUM

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Correct Answer: Option A

Explanation:
COUNT returns the number of rows in a table or group.

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

Question #3

Which SQL command is used to permanently remove an entire table structure along with all its data from the database?

A. REMOVE

B. DROP

C. TRUNCATE

D. DELETE

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Correct Answer: Option B

Explanation:
The DROP command is a DDL statement that completely removes a table's structure, definition, and all its associated data from the database.

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

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