To keep a desktop computer or a server powered up when the electricity goes off in addition to protection against power fluctuations, an <u>uninterruptible power supply (UPS)</u>, which contains a built-in battery, can be used.
<u>Explanation</u>:
An uninterruptible power supply (UPS) is a device that allows a computer or server powered up for a short time, when the electricity goes off. UPS device also provides uninterrupted service during power fluctuation.
A battery is inbuilt in the UPS and provides power for few minutes to the computer to shut down it in a proper manner.
UPS is available at affordable cost and can be maintained at low cost compared to generators.
Answer:
=SUM(Range value)
like =SUM(A1:A7) or =SUM(A1:H1)
Explanation:
We need to make use of the SUM function, and then we need to mention the cells or range value that references a series of cells row-wise or column-wise. Like a range value of A1:A7 means A1,A2,A3,A4,A5,A6,A7 and the range value of A1:H1 means A1, B1,C1,D1,E1,F1,G1,H1. And similarly, you can represent various cells depending upon the code you come up it, and finally, you need to sum them all using the SUM function.
Converting raw data into a more meaningful form is called: processing
Answer:
Explanation:
a)use order by clause for sorting
for $x in doc("books.xml")/bib/book order by xs:float($x/price) return $x/title (default sorted in ascending order)
or
for $x in doc("books.xml")/bib/book order by xs:float($b/price) descending return $b/title (sorted in descending order)
b)doc("books.xml")//book[author = 'Abiteboul']
c)for $x in distinct-values(doc("bib.xml")/bib/book/author)
return <res>
<name>{$x}</name>
<count>
{count (doc("bib.xml")//book[exists(indexof(author,$x))]) }
</count>
<res>
