Explanation:There is always a copy kept on disk of every block, but the copy on disk may be a version of the block older than the version in the buffer. 3. The subsystem responsible for the allocation of buffer space is called the ___________.
A. Buffer
B. Buffer manager
C. Storage
D. Secondary storage
Answer:A
Explanation:There is always a copy kept on disk of every block, but the copy on disk may be a version of the block older than the version in the buffer. 3. The subsystem responsible for the allocation of buffer space is called the ___________.
A. Buffer B. Buffer manager C. Storage D. Secondary storage
Explanation:Programs in a database system make requests (that is, calls) on the buffer manager when they need a block from disk. 4. In the buffer where there is no space for another block, the bllock can be inserted using