Disk access is way slower than
memory access. Caching is a technique to improve the disk access time. Block cache is a caching technique which
reduces disk accesses time. Here a
portion of disk is bought to cache for reading and a modified blocks are first
changed in cache but reflected in the disk at one go. On the other hand with write through caching
each modified block is written to cache and at the same time it is written to
the disk. Write- through caching
requires more disk I/O so they can have a negative effect on the performance.
Answer:
A. data mart
Explanation:
Data mart refers to a structure for storing and retrieving data. Often times, the data mart is usually specific to a business line.
The data contained herein is also specific to a particular department and by so doing this facilitate easy isolation, use and development of the data.
The major advantage of creating data marts is for easy accessibility of data.
The answer is False.
According to research, a passive close doesn't lead your cover letter to have more interviews. In writing the closing part of your cover letter, it is easy to have a passive sentence but it sounds like less confidence to the employer. The last part of the cover letter should contain strong content to give an impression to the person who reads.
