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

Question

Quizplus · Accepted Answer

When moving data from permanent storage to RAM, an I/O disk operation retrieves an entire physical disk block, not an entire table, a single row, or a single attribute. This is because data is stored and retrieved in blocks, not individual pieces.

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