Answer:
The code will give an error that is "At least one public class is required in main file".
Explanation:
In the given code if we do not use the public access modifier to the class. It will give an error so, the correct code to this question as follows:
Program:
import java.util.HashSet; //import package
public class A //define class as public.
{
public static void main(String[ ] args) //define main method.
{
HashSet set = new HashSet(); //creating hashset object.
set.add("A"); //add alphabet in hashset
set.add("B"); //add alphabet in hashset
set.add("C"); //add alphabet in hashset
System.out.print("Size of HashSet is :"set.size()); //print the size of hashset.
}
}
Output:
Size of HashSet is : 3
Explanation of the program:
- In the above program, we define a public class that is "A" and inside the class, we define the main method.
- Inside the main method, we create a HashSet class object that is "set".
- To add elements in HashSet we use add() function that adds elements and in the last, we use the size() function that prints the size HashSet.
Answers- My computer, My Documents and Recyle bin.
2,3,4 option
Access: full electronic participation in society.
Commerce: electronic buying and selling of goods.
Communication: electronic exchange of information.
Literacy: process of teaching and learning about technology and the use of technology.
Etiquette: electronic standards of conduct or procedure.
Law: electronic responsibility for actions and deeds.
Rights & Responsibilities: those freedoms extended to everyone in a digital world.
Health & Wellness: physical and psychological well-being in a digital technology world.
Security (self-protection): electronic precautions to guarantee safety.
IMPORTANT
Etiquette. Students need to understand how their technology use affects others. ...
Literacy. Learning happens everywhere. ...
Rights and responsibilities. Build trust so that if something happens online, students are willing to share their problems or concerns about what has happened.
Answer:
Option B and C are the correct answer for the above question
Explanation:
The above question asked about the work of the programmer to catch an error of the program--
- Then the option B states that the programmer needs to prints the value of the various program variable on every line of the program which is the correct solution because it is used to find the error easily. It defines the value of every variable in every place of the program and the programmer caught the error statement in the program if anywhere the variable gets the false value.
- The C option states to help from a friend, it is also a good solution because the friend can easily be caught the error of the program by seeing every line of code.
- But the other option is not correct because the option A states that the change the name of the variable which is not a result of anything.
- And the option D states that the code will be retyped again which is also not justify anything.
