Which of the following is an example of a NoSQL database? MCQ with Answer and Explanation
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Question #1
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Which database structure is created to drastically speed up the retrieval of rows from a table at the expense of slower data updates?
Correct Answer: Option C
Explanation:
An Index is a performance optimization structure created on table columns to search and locate matching rows quickly without performing a full table scan.
An Index is a performance optimization structure created on table columns to search and locate matching rows quickly without performing a full table scan.
This question belongs to:
Computer
Database Management System (DBMS)
Question #2
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What is the purpose of a Foreign Key?
Correct Answer: Option B
Explanation:
A foreign key establishes a relationship between tables and maintains referential integrity.
A foreign key establishes a relationship between tables and maintains referential integrity.
This question belongs to:
Computer
Database Management System (DBMS)
Question #3
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How many fundamental rules did E.F. Codd define to determine whether a database system qualifies as a true relational database management system?
Correct Answer: Option B
Explanation:
E.F. Codd formulated 12 rules (numbered 0 to 11, often called Codd's 12 Rules) to evaluate relational database management systems.
E.F. Codd formulated 12 rules (numbered 0 to 11, often called Codd's 12 Rules) to evaluate relational database management systems.
This question belongs to:
Computer
Database Management System (DBMS)
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