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.
<h2>"<lastmod>" is the right choice for the given scenario</h2>
Explanation:
<update> This tag does not belong to <URL> tag of the site map. Hence this option goes invalid.
<lastmod> This gives details of the date and time when the website content was changed. It will be in "W3C Date time format". This may omit time at times. This is the write answer.
<loc> This contains the URL of the web page.
<changefreq>: How frequently the "web page is likely to get modified". The values which it accepts are: "monthly, always
, daily
, weekly
,hourly, yearly
, never"
Answer:Yes !
Explanation: I totally agree, he really is looking !
Answer:
true
Explanation:
web application is a software or program which is accessible using any web browser.
