Which is the correct description of a pinned buffer in the database buffer cache（）
A: The buffer is currently being accessed.
B: The buffer is empty and has not been used.
C: The contents of the buffer have changed and must be flushed to the disk by the DBWn process.
D: The buffer is a candidate for immediate aging out and its contents are synchronized with the block contents on the disk.
A: The buffer is currently being accessed.
B: The buffer is empty and has not been used.
C: The contents of the buffer have changed and must be flushed to the disk by the DBWn process.
D: The buffer is a candidate for immediate aging out and its contents are synchronized with the block contents on the disk.
举一反三
- （） is typically not referred to as a buffer type in critical chain project management． A: Resource buffer B: Free buffer C: Feed buffer D: Project buffer
- A buffer can only sustain its pH within its buffer capacity.
- The more the total concentration of a buffer, the more its buffer capacity at 298K.
- 与LEA AX，BUFFER等价的指令为（ ）。 A: MOV AX，BUFFER B: MOV AX，OFFSET BUFFER C: MOV AX，DS：BUFFER D: AX EQU BUFFER
- 代码： 以下正确的说法是：（） A: buffer中所有的元素都具有初始值2。 B: buffer[1]、buffer[2]、buffer[3]的初始值是随机的。 C: buffer[1]、buffer[2]、buffer[3]的初始值是确定的，为0。 D: buffer[1]、buffer[2]、buffer[3]的初始值是确定的，但可能随编译器实现而变化。