Which statements are true regarding table compression？（）
A: A It saves disk space and reduces memory usage.
B: B It saves disk space but has no effect on memory usage.
C: C It incurs extra CPU overhead during DML as well as direct loading operations.
D: D It incurs extra CPU overhead during DML but not direct loading operations.
E: E It requires uncompress operation during I/O.
A: A It saves disk space and reduces memory usage.
B: B It saves disk space but has no effect on memory usage.
C: C It incurs extra CPU overhead during DML as well as direct loading operations.
D: D It incurs extra CPU overhead during DML but not direct loading operations.
E: E It requires uncompress operation during I/O.
举一反三
- Which statements are true regarding table compression？（） A: A It saves disk space and reduces memory usage. B: B It saves disk space but has no effect on memory usage. C: C It incurs extra CPU overhead during DML as well as direct loading operations. D: D It incurs extra CPU overhead during DML but not direct loading operations. E: E It requires uncompress operation during I/O.
- Comparing with programmed I/O, interrupt-driven I/O further raises the usage rate of CPU operations, because __________ A: it isn’t necessary for CPU to save and restore scene B: it isn’t necessary for CPU to intervene the dada transfer C: it isn’t necessary for CPU to read and check status repeatedly D: both A and B
- 121. ____is known as a long hatch during loading operation.
- 智慧职教: What does theISSmean during the ARQ operations?
- Which of the followings is not the usage of lexical metaphor in scientific literature?( ) A: output width B: rail bed C: sunflower disk