Question

In the buffer where there is no space for another block, the block can be inserted using

(a) Pinned block strategy

(b) Forced output block

(c) Buffer replacement strategy

(d) All of the mentioned

The question was posed to me in final exam.

This interesting question is from Database Buffer topic in section Storage and File Structures of Database Management

Answer 1

Correct choice is (c) Buffer replacement strategy

To explain: Most operating systems use a least recently used (LRU) scheme, in which the block that was referenced least recently is written back to disk and is removed from the buffer.