Database Management Systems (DBMS)
What is Denormalization primarily used for?
Difficulty: Hard
About this MCQ
This Hard Database Management Systems (DBMS) question asks: What is Denormalization primarily used for? The correct choice is C. The process of intentionally introducing redundancy into a database to improve read performance.. Read the options below, commit to one, then use the explanation to see why that choice holds and why the others do not.
Database Management Systems (DBMS) items like this one are written for Pakistan exams such as CSS, FPSC, PPSC, and NTS. The difficulty label is a hint about how much of the topic the stem assumes, not a score. Tags and exam names, when they are present, tell you where else the same idea is tested. Previous and next links stay in Database Management Systems (DBMS) so you can continue the subject. Related questions point at nearby stems if you want another angle on the same idea.
Treat the explanation as part of the question, not a footnote. If you missed it, reread the stem against the correct option before you open the next Database Management Systems (DBMS) item. A timed quiz is the same pool with a clock and a score. A past paper is a full sitting rather than this single question.
- A. A minimal set of attributes that can uniquely identify a record in a table.
Why not A: “A minimal set of attributes that can uniquely identify a record in a table.” does not fit this question. The answer is The process of intentionally introducing redundancy into a database to improve read performance..
- B. A set of properties (Atomicity, Consistency, Isolation, Durability) that guarantee reliable database transactions.
Why not B: “A set of properties (Atomicity, Consistency, Isolation, Durability) that guarantee reliable database transactions.” does not fit this question. The answer is The process of intentionally introducing redundancy into a database to improve read performance..
- C. The process of intentionally introducing redundancy into a database to improve read performance. ✓
- 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 The process of intentionally introducing redundancy into a database to improve read performance..
Correct answer
C. The process of intentionally introducing redundancy into a database to improve read performance.
Explanation
The process of intentionally introducing redundancy into a database to improve read performance. is the value that answers “What is Denormalization primarily used for” (option C). Option A (A minimal set of attributes that can uniquely identify a record in a table.) does not fit this question. Option B (A set of properties (Atomicity, Consistency, Isolation, Durability) that guarantee reliable database transactions.) 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 The process of intentionally introducing redundancy into a database to improve read performance..
Source: Database Management Systems (DBMS) Official Reference Guide
Tags: computer science, dbms, SQL, databases
Submitted by: MCQsHub Editorial
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