Write a list of system calls that your program can use: fprintf(), open(), fgets(), and fclose (). Use execvp() (or any other exec..()) instead of system()?

Please answer ASAP

Write EXACTLY what is printed by the code.

Java. Please use the template in the picture.

Implement the following in the .NET Console App. Write the Bus class. A Bus has a length, a color, and a number of wheels.    a.    Implement data fields using auto-implemented Properies  b.    Include 3 constructors: default, the one that receives the Bus length, color and a number of wheels as input (utilize the Properties) and the Constructor that takes the Bus number (an integer) as input.

Using the Card.java class file, write a program to simulate a Deck of Cards. See Programming Project 8.7 (PP 8.7) from page 403 of your textbook (or view the attached image) for a description of what your program needs to do. Note that although the book description of the problem states that you should write the Card class, I do not want you to do that. You must use the Card file exactly as it is provided (NO modifications) and only write the DeckOfCards and Driver classes. public class Card{public final static int ACE = 1;public final static int TWO = 2;public final static int THREE = 3;public final static int FOUR = 4;public final static int FIVE = 5;public final static int SIX = 6;public final static int SEVEN = 7;public final static int EIGHT = 8;public final static int NINE = 9;public final static int TEN = 10;public final static int JACK = 11;public final static int QUEEN = 12;public final static int KING = 13; public final static int CLUBS = 1;public final static int DIAMONDS =…

Implement a simple e-mail messaging system. I have already designed a Message class and a Mailbox/MailboxTest class. A message has a recipient, a sender, and a message text. A Mailbox can store and manipulate messages and tell the user how many they have. Supply a number of mailboxes for different users and a user interface(GUI) for the user to login, send messages to other users, read their own messages, and log out. Please explain each thing you do.   Here is my Message class: publicclass Message {     private String recipient; private String sender; private String messageBody; public Message(Stringsender, String recipient) { this.sender =sender; this.recipient =recipient; this.messageBody =""; } public void append(String text) { this.messageBody +=text +"\n"; } public String toString() { return "From: " + this.sender+ "\n" + "To: " + this.recipient + "\n" + "Message: " + this.messageBody; } }   Here is Mailbox class: import java.util.ArrayList;   publicclass Mailbox{       private…

Find out about Java’s switch-case statement. What is its -purpose? How is it used? Write an example. (This is also a control flow -statement, so you will find information in similar locations as for the do-while loop.)