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:
Single quotes; Double quotes
Explanation:
Character literals is a type of literal in Java programming used for denoting constant valued character. Examples are 'g', '6', 'A' '+' etc.
String literals is a type of literal in Java programming used for representing or displaying of a sequence of characters or string values. Examples are "Hello Brainly user"
In Java programming, Character literals are enclosed in single quotes, string literals are enclosed in double quotes.