Answer:
Purposes of Data Layer, in the Layered model for web applications are as following:-
1. The data Layer,is the third layer and it takes care of the all the operations concerning the database level.
2. This data layer gets a command from the application layer to send a query to the database and will process this command according to the type of database that is used.
3. It will ensure that the correct connections to the database are set.
4. It is represented by the Database.
Answer:
1. Where,
2. From
Explanation:
In SQL query language when working on a database, a user can use certain clauses to carry out some functions.
Hence, The WHERE clause allows us to select only those rows in the result relation of the FROM clause that satisfy a specified predicate.
This is because the "Where clause" selects the rows on a particular condition. While the "From clause" gives the relation which involves the operation.
Answer:
To avoid receiving malware-infected files like spam.
Explanation:
Hackers use malware to gain unauthorized access to company files and information for personal gain. Files infected by the malware can infect other systems or files. There are various types of malware namely; virus, trojan horse, worm, spyware, ransomware, adware etc.
Answer:
focuses on a certain subject
Explanation:
it means that it focuses on that one subject and none others
Hope it helps c:
$21.08 is an example of a currency Number format in Excel
<u>Explanation:</u>
For items like currency, one can format numbers in cells in Excel.
To view all possible number formats, click the Dialog Box Launcher attached to Number on the Home tab in the Number group.
In the Format Cells dialog box, in the Category list, click Currency or Accounting.
In the Symbol box, tick the currency symbol.
In the Decimal places box, insert the number of decimal places.
Employed for common financial values and presents the default currency figure with quantities.
Ctrl+Shift+$ is a shortcut to represent currency values.
