When moving data from permanent storage to RAM,an I/O disk operation retrieves:
A)an entire table.
B)an entire physical disk block.
C)only the row containing the attribute requested.
D)only the attribute which was requested.

Question

Quizplus · Accepted Answer

When moving data from permanent storage to RAM, an entire physical disk block is retrieved through an I/O disk operation. This is because data is typically stored in large blocks on disks, and retrieving these blocks is more efficient than retrieving each individual row or attribute separately.

When Moving Data from Permanent Storage to RAM,an I/O Disk