Q11medium
A table is stored as an unordered Heap File with 1,000,000 blocks. If no index exists, what is the average number of block reads required to find a record by its Primary Key?
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15 Questions Total
Indexing & File Organization MCQs
Topic-wise practice questions for Database Management Systems. Test your knowledge, check solutions on demand, and pace your preparation.
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Practice in Timed ModeQ12hard
A database contains millions of "Sensor Readings". Queries always look for readings within a specific 10-minute time window (e.g., WHERE reading_time BETWEEN '10:00' AND '10:10'). Which index type is the most mathematically efficient for this use case?
Q13medium
Analyze the following execution plan output. Why did the database engine decide to ignore the index on the status column?
Q14medium
You execute the following command to optimize a report. What is the technical term for the type of index created?
Q15easy
Which of the following is the defining characteristic of a Clustered Index?