Answer:
See explaination
Explanation:
An Academic Database deals with the information pertaining to the records of students of an institute. The various fields which can be associated with a student are Name, Unique Identification Number, Marks in various subjects, Grades, Courses Taken and so on. Most of the fields mentioned above have some or other form of validation that is required for the DB to be consistent and follow the basic properties of a database.
One field where range validation can be used is MARKS. In the marks field, the range of marks will be say 0 to 100 and anything below 0 or above 100 must be reported to the database administrator. Another field where we can apply a range validation is AGE in which the range of age allowed could greater than say 10, if it is a college and maximum age could be say 60. Thus, the range check on the AGE field is 10 to 60.
One field where choice validation can be used is GENDER. In the gender field, there could be multiple choices like Male, Female and Others. Thus, out of the available choices we have to select only the available choice and only one choice must be selected where we can apply choice validation. Another field is COURSE, where we can have a list of courses a student can opt for and out of the available courses can select one.
Thus, there are multiple fields where we can apply various types of validation and it is important to explore the area for which the DB has been created understanding all the scenarios and attributes of the problems that are associated with that area.
Answer:
It allows many developers to work on the same project from anywhere at the same time
Project files are maintained in a central repository
The process may require file locking, depending on file type
Explanation:
The two main types of version control system are the centralized version control system and distributed control system
The centralized version control system is a control system whereby all programmers work on and make their individual changes to a single single copy of the project stored and maintained in a central repository, such as a server
In order to solve the problem of several developers working on each others work simultaneously, a centralized version control system makes use of the lock-modify-unlock model
The three options are therefore;
It allows many developers to work on the same project from anywhere at the same time
Project files are maintained in a central repository
The process may require file locking, depending on file type
The
accessibility category of apps makes the computer easier for blind people to
use. In general the accessibility apps are apps that help people with
disabilities use a particular piece of hardware. For example there is an app
designed to help blind people use their devices by paring them with a voluntary
non-blind people trough audio-video connections.
