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:
For shadow passwords the shadow-utils package to be enabled
Explanation:
The shadow-utils package includes the necessary programs forconverting UNIX password files to the shadow password format, plusprograms for managing user and group accounts. The pwconv commandconverts passwords to the shadow password format. The pwunconv commandunconverts shadow passwords and generates a passwd file (a standardUNIX password file). The pwck command checks the integrity of passwordand shadow files. The lastlog command prints out the last login timesfor all users. The useradd, userdel, and usermod commands are used formanaging user accounts. The groupadd, groupdel, and groupmod commandsare used for managing group accounts.
Hey there!
The answers to your question are as follows:
A.) Goals for the research project
B.) Research topic
D.) Possible sources
F.) Research method
A ~ the goals are important because you want to know why you are doing it. the goals can be good for remembering who your audience is.
B ~ Research topic is important because you want to know what your researching
D ~ Possible sources are important, too, because you want to know how you are going to get your information
F.) a research method is also important because it can help you stay organized
Hope this helps! Good luck! Have a great day!
the answer can be both C or D. For a more <u>specific answer</u> i would prefer <u>option D</u>.
Answer:
import java.util.Scanner;
public class HelloIDE
{
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.print("Enter your name: ");
String name = input.nextLine();
name = name.trim();
if(name.equals(""))
name = "stranger";
System.out.println("Hello, " + name + "!");
}
}
Explanation:
import the Scanner class to be able to get input from the user
Create an object of the Scanner class called input
Ask the user to enter the name and set it to the name
Trim the name using trim() method, removes the whitespaces from the string
Check the name. If name is equal to "", set the name as stranger. This way if the name is empty, or just contains whitespaces or if name is not given, name will be set as stranger.
Print the name in required format