Answer:
They use principles of light to scan document
Magnetic scanning
Explanation:
The answer is C. Central processing unit (or CPU).
The trick is in the name, central processing unit :)
Answer:
A database view is a searchable object in a database that is defined by a query. Though a view doesn't store data, some refer to a views as “virtual tables,” you can query a view like you can a table. A view can combine data from two or more table, using joins, and also just contain a subset of information.
Explanation:
A database view is a subset of a database that is based on a query that runs on one or more database tables. Database views are saved in the database as named queries and can be used to save complete queries that are frequently used.
Answer: True
Explanation: Gen/Spec is the known as the general specification standard for the classes.This standard helps in bringing out the peer-to-peer relations of class.
Gen/Spec is used in class diagram because it helps in the display of the access sharing and class specification in the general form for the required instances.Thus, this standard helps in the enhancement of the class diagram and its inheritance. So, the statement given in the question is true.