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.
A
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。
内容
- 0
The more the total concentration of a buffer, the more its buffer capacity at 298K. A: 正确 B: 错误
- 1
In the bounded buffer problem ____________ A: there is only one buffer B: there are n buffers ( n being greater than one but finite) C: there are infinite buffers D: the buffer size is bounded
- 2
在执行“LEA BX,BUFFER”指令时,是把( )。 A: BUFFER的内容èBX B: BUFFER的偏移量èBX C: BUFFER的段基值èBX D: BUFFER的内容èEA
- 3
Regarding the determination of the effective buffer range of the buffer solution, which of the following is not the factor we should consider A: pH= pKa±1 B: The buffer ratio is between 0.1 and 10 C: Large buffer capacity D: High total concentration
- 4
解析后的SQL语句在SGA中的哪一个组件中进行缓存( )。 A: DATABASE BUFFER B: DATA DICTIONARY BUFFER C: LIBRARY BUFFER D: LARGE POOL