What is a data dictionary in a DBMS? MCQ with Answer and Explanation

Question
What is a data dictionary in a DBMS?
A. A log file
B. A repository of metadata about the database
C. A backup of the database
D. A table containing user data
Answer: Option B
Solution (By JKSSB Mock Tests)
The data dictionary stores metadata such as table definitions, column types, constraints, and other database objects.
This question belongs to: Computer Database Management System (DBMS)
Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Database Management System (DBMS) Questions

Question #1
What is the result of the SQL query: SELECT * FROM employees;?
A. All rows and all columns from the employees table
B. Only the primary key column
C. Only the first row
D. An empty result
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option A

Explanation:
SELECT * retrieves all columns and rows from the specified table.
This question belongs to: Computer Database Management System (DBMS)
Question #2
A key that consists of more than one attribute to uniquely identify rows in a table is called a what?
A. Foreign Key
B. Composite Key
C. Primary Key
D. Secondary Key
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option B

Explanation:
When a primary key or unique key comprises two or more columns (attributes) combined together, it is known as a Composite Key.
This question belongs to: Computer Database Management System (DBMS)
Question #3
Which of the following ensures data integrity in RDBMS?
A. User input without checks
B. Random data entry
C. Constraints like primary key, foreign key
D. No validation rules
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option C

Explanation:
Integrity constraints such as keys enforce rules for valid data.
This question belongs to: Computer Database Management System (DBMS)
Explore All Database Management System (DBMS) MCQs
Today's Top Topics
Cyber Security 269 Database Management System (DBMS) 278 Computer Abbreviations 369 Computer Fundamentals 326 Computer Software 347
Explore Subjects
Accountancy and Statistics 3179 Economy GK 2220 English 15164 Computer 5279 Current Affairs 575
Practice Mix
Which of the following is an indirect tax in India?
The valve between the left atrium and left ventricle is the:
A person faces north. He turns 45° left, then 90° right, then 45° left. Which direction is he facing?
Under the Income Tax Act, the 'TDS' on the sale of an immovable property (other than agricultural land) by a resident is governed by which section, and what is the rate?
In 'Piecemeal Distribution' during dissolution, the first priority for payment of outside liabilities is: