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2 years ago

Which telecommunications device is widely used in industries that require closed communication?

Computers and Technology

2 answers:

forsale [732]2 years ago

7 0

Answer:

<u>D. walkie-talkies </u>

Explanation:

<u>walkie-talkies </u>are used in industries that require closed communication

Stella [2.4K]2 years ago

3 0

The telecommunications device that is widely used in industries that require closed communication are walkie-talkies. Correct answer: D

Walkie-talkies are hand-held, portable, two-way radio transceivers which enable secure communication between the two points, without being part of a network.

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Does the submission include the file "SuperPower.java"? Does the file include a public class called "SuperPower"? Does the class

Oduvanchick [21]

Answer:

Here is the program fulfilling all the requirements given:

import javax.swing.JOptionPane;

public class SuperPower{

public static void main(String[] args) {

String power;

power = JOptionPane.showInputDialog("What is your super power?");

power = power.toUpperCase();

JOptionPane.showMessageDialog(null, power);} }

Explanation:

Does the file include a public class called "SuperPower"

See the statement:

public class SuperPower

Does the class include a public method called "main"? Is the "main" method static?

See the statement:

public static void main(String[] args)

Does the main method have a String assignment statement that uses "JOptionPane.showInputDialog"

See the statement:

power = JOptionPane.showInputDialog("What is your super power?");

Does the main method have a statement that uses "JOptionPane.showMessageDialog"?

See the statement:

JOptionPane.showMessageDialog(null, power);

Does the program convert the String from "JOptionPane.showInputDialog" using the "toUpperCase" method?

See the statement:

power = power.toUpperCase();

Does the submission include a screenshot that shows an Input dialog that asks, "What is your superpower?" Does the submission include a screenshot that shows a Message dialog stating " TO THE RESCUE!", where "" is the input converted to upper case?

See the attached screenshots

If the program does not let you enter an exclamation mark after "to the rescue" then you can alter the code as follows:

import javax.swing.JOptionPane;

public class SuperPower{

public static void main(String[] args) {

String power;

power = JOptionPane.showInputDialog("What is your super power?");

power = power.toUpperCase();

JOptionPane.showMessageDialog( null, power+"!");} } // here just add an exclamation mark which will add ! after the string stored in power

5 0

2 years ago

Write a static method named countLastDigits that accepts an array of integers as a parameter and examines its elements to determ

Crazy boy [7]

Answer:

See explaination for the program code

Explanation:

code:

public static int[] countLastDigits(int[] list) {

int[] count = new int[10];

for (int i = 0; i < list.length; i++) {

int digit = list[i] % 10;

count[digit]++;

}

return count;

}

8 0

2 years ago

Brittany just pulled up a database table with employee information that contains 50 records of employees at her company. Which o

lesantik [10]

Answer:

The answer is: Operations.

Explanation:

A database operation accesses to information of a relational database. In this case, Brittany has creates the database operation that select employee information of her company and the database has returned a result set. The SQL statement to perform operations on a database are:

INSERT

SELECT

UPDATE

DELETE

3 0

2 years ago

Suppose your company has decided that it needs to make certain busy servers faster. Processes in the workload spend 60% of their

vekshin1

Answer:

CPU need 50% much faster

disk need 100% much faster

Explanation:

given data

workload spend time CPU = 60%

workload spend time I/O = 40%

achieve overall system speedup = 25%

to find out

How much faster does CPU need and How much faster does the disk need

solution

we apply here Amdahl’s law for the overall speed of a computer that is express as

S = $\frac{1}{(1-f)+ \frac{f}{k} }$ .............................1

here f is fraction of work i.e 0.6 and S is overall speed i.e 100% + 25% = 125 % and k is speed up of component

so put all value in equation 1 we get

S = $\frac{1}{(1-f)+ \frac{f}{k} }$

1.25 = $\frac{1}{(1-0.6)+ \frac{0.6}{k} }$

solve we get

k = 1.5

so we can say CPU need 50% much faster

and

when f = 0.4 and S = 125 %

put the value in equation 1

S = $\frac{1}{(1-f)+ \frac{f}{k} }$

1.25 = $\frac{1}{(1-0.4)+ \frac{0.4}{k} }$

solve we get

k = 2

so here disk need 100% much faster

7 0

2 years ago

Design a class named Person and its two subclasses named Student and Employee. Make Faculty and Staff subclasses of Employee. A

harina [27]

Answer:

se explaination

Explanation:

//Design a class named Person

public class Person

{

//A person has a name, address, phone number, and email address.

String name;

String address;

String phone;

String email;

//Constructor with arguments

public Person(String pname,String paddress,String phNum,String pemail)

{

name=pname;

address=paddress;

phone=phNum;

email=pemail;

}

// toString() method to return the name

public String toString()

{

return getClass().getName()+" "+name;

}

---------------------------------------------------------

//Student.java

public class Student extends Person

{

//A student has a class status

//(freshman,sophomore, junior, or senior).

//Define the status as a constant.

final int freshman =1;

final int sophomore =2;

final int junior=3;

final int senior=4;

String status="freshman";

//Constructor with arguments

public Student(String name, String address,String phonenumber, String email, int Status)

{

super(name,address,phonenumber,email);

if(Status == 1)

{

status = "freshman";

}

if(Status == 2)

{

status = "sophomore";

}

if(Status == 3)

{

status = "junior";

}

if(Status == 4)

{

status = "Senior";

}

status = "Student";

}

public String toString()

{

return super.toString() + " " + status;

}

------------------------------------------------------

//Employee.java

public class Employee extends Person

{

//An employee has an office, salary, and date hired.

String office;

double salary;

java.util.Date dateHired;

//Constructor with arguments

public Employee(String name,String address,String phonenumber,String email,String off,double sal)

{

super(name,address,phonenumber,email);

office=off;

salary=sal;

}

public String toString()

{

return (super.toString() + " " + office +" " + salary);

}

--------------------------------------------------------

//Faculty.java

public class Faculty extends Employee

{

//A faculty member has office hours and a rank.

String officeHours;

String rank;

//Constructor with arguments

public Faculty(String name,String address,String phonenumber,String email,String off,int salary,String offHours,String ranks)

{

super(name,address,phonenumber,email,off,salary);

officeHours=offHours;

rank=ranks;

}

public String toString()

{

return (super.toString() + " " + officeHours +" " + rank);

}

-----------------------------------------------------------------------------

//Staff.java

public class Staff extends Employee

{

//A staff member has a title

String title;

//Constructor with arguments

public Staff(String name,String address,String phonenumber,String email,String off,int salary,String ti t)

{

super(name,address,phonenumber,email,off,salary);

title=ti t;

}

public String toString()

{

return (super.toString() + " " + title);

}

3 0

2 years ago