What is a database schema? MCQ with Answer and Explanation
Question
Report Error
Discuss this Question (0)
Practice More Database Management System (DBMS) Questions
Question #1
Report Error
A Primary Key in RDBMS must be:
Correct Answer: Option B
Explanation:
A primary key uniquely identifies each record and cannot contain null values.
A primary key uniquely identifies each record and cannot contain null values.
This question belongs to:
Computer
Database Management System (DBMS)
Question #2
Report Error
What value represents missing, unknown, or inapplicable data in a relational database?
Correct Answer: Option D
Explanation:
NULL is a special marker used in SQL to indicate the absence of a value or that the data is missing, unknown, or not applicable.
NULL is a special marker used in SQL to indicate the absence of a value or that the data is missing, unknown, or not applicable.
This question belongs to:
Computer
Database Management System (DBMS)
Question #3
Report Error
What does a database constraint called a 'CHECK' constraint do?
Correct Answer: Option C
Explanation:
A CHECK constraint enforces domain integrity by limiting the values accepted by a column to only those that satisfy a specified Boolean predicate.
A CHECK constraint enforces domain integrity by limiting the values accepted by a column to only those that satisfy a specified Boolean predicate.
This question belongs to:
Computer
Database Management System (DBMS)
No comments yet. Be the first to start the discussion!