Database Management Systems (DBMS)
Identify the correct definition of Database index.
Difficulty: Hard
About this MCQ
This Hard Database Management Systems (DBMS) MCQ checks one syllabus fact.
The question is: “Identify the correct definition of Database index.”
The accepted answer is A. A database structure that improves the speed of data retrieval operations on a table.. Identify the correct definition of Database index is answered by A database structure that improves the speed of data retrieval operations on a table option A Option B A stored procedure that automatically executes in response to certain events on a table does not match the stem it is a near-miss used to catch incomplete recall of A database structure that improves the speed of data retrieval operations on a table Option C The process of intentionally introducing redundancy into a database to improve read performance does not match the stem it is a near-miss used to catch incomplete recall of A database structure that improves the speed of data retrieval operations on a table Remaining alternatives An SQL operation.
- A. A database structure that improves the speed of data retrieval operations on a table. ✓
- B. A stored procedure that automatically executes in response to certain events on a table.
Why not B: “A stored procedure that automatically executes in response to certain events on a table.” is not correct. The accepted answer is A. A database structure that improves the speed of data retrieval operations on a table.. Identify the correct definition of Database index is answered by A database structure that improves the speed of data retrieval operations on a table option A Option B A stored pro
- C. The process of intentionally introducing redundancy into a database to improve read performance.
Why not C: “The process of intentionally introducing redundancy into a database to improve read performance.” is not correct. The accepted answer is A. A database structure that improves the speed of data retrieval operations on a table.. Identify the correct definition of Database index is answered by A database structure that improves the speed of data retrieval operations on a table option A Option B A stored pro
- D. An SQL operation that combines rows from two or more tables based on a related column.
Why not D: “An SQL operation that combines rows from two or more tables based on a related column.” is not correct. The accepted answer is A. A database structure that improves the speed of data retrieval operations on a table.. Identify the correct definition of Database index is answered by A database structure that improves the speed of data retrieval operations on a table option A Option B A stored pro
Correct answer
A. A database structure that improves the speed of data retrieval operations on a table.
Explanation
Identify the correct definition of Database index is answered by A database structure that improves the speed of data retrieval operations on a table option A Option B A stored procedure that automatically executes in response to certain events on a table does not match the stem it is a near-miss used to catch incomplete recall of A database structure that improves the speed of data retrieval operations on a table Option C The process of intentionally introducing redundancy into a database to improve read performance does not match the stem it is a near-miss used to catch incomplete recall of A database structure that improves the speed of data retrieval operations on a table Remaining alternatives An SQL operation.
Source: Database Management Systems (DBMS) Official Reference Guide
Tags: computer science, dbms, SQL, databases
Submitted by: MCQsHub Editorial
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