Database Management Systems (DBMS)
Which statement correctly explains Entity-Relationship (ER) diagram?
Difficulty: Medium
About this MCQ
This Medium Database Management Systems (DBMS) question asks: Which statement correctly explains Entity-Relationship (ER) diagram? The correct choice is A. A diagram that visually represents entities and their relationships within a database.. Read the options below, commit to one, then use the explanation to see why that choice holds and why the others do not.
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- A. A diagram that visually represents entities and their relationships within a database. ✓
- B. A minimal set of attributes that can uniquely identify a record in a table.
Why not B: “A minimal set of attributes that can uniquely identify a record in a table.” does not fit this question. The answer is A diagram that visually represents entities and their relationships within a database..
- 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.” does not fit this question. The answer is A diagram that visually represents entities and their relationships within a database..
- D. A virtual table based on the result of a stored SQL query.
Why not D: “A virtual table based on the result of a stored SQL query.” does not fit this question. The answer is A diagram that visually represents entities and their relationships within a database..
Correct answer
A. A diagram that visually represents entities and their relationships within a database.
Explanation
A diagram that visually represents entities and their relationships within a database. is the term that matches “Which statement correctly explains Entity-Relationship (ER) diagram” (option A). Option B (A minimal set of attributes that can uniquely identify a record in a table.) does not fit this question. Option C (The process of intentionally introducing redundancy into a database to improve read performance.) does not fit this question. Option D (A virtual table based on the result of a stored SQL query.) does not fit this question. For this Database Management Systems (DBMS) question, the accepted answer is A diagram that visually represents entities and their relationships within a database..
Source: Database Management Systems (DBMS) Official Reference Guide
Tags: computer science, dbms, SQL, databases
Submitted by: MCQsHub Editorial
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