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fenix001 [56]
2 years ago
7

Who is currently using which computer at WP? Create an appropriate SQL query to answer this question. Show SerialNumber, Make, a

nd Model. Show EmployeeID, LastName, FirstName, Department, and OfficePhone. Sort first by Department and then by employee LastName. Save this query using the query naming rules in exercise AW.3.1.
Computers and Technology
1 answer:
lidiya [134]2 years ago
4 0

Answer:

Check the explanation

Explanation:

For SQL server and mySQL:

          SELECT    C.SerialNumber, Make, Model, E.EmployeeNumber,  

                            LastName, Firstname, Department, OfficePhone

          FROM       COMPUTER AS C JOIN COMPUTER ASSIGNMENT AS CA        

                            ON C.SerialNumber=CA.SerialNumber

                            JOIN EMPLOYEE AS E ON

                            CA.EmployeeNumber=E.EmployeeNumber

                            WHERE DateReassigned IS NULL

                            ORDER BYDepartment, LastName;

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Explain why Windows and Linux implements multiple locking mechanisms. Describe the circumstances under which they use spinlocks,
galben [10]

Answer:

The description for the given question is described in the explanation section below.

Explanation:

Depending on the needs of the device programmers these OS have various locking frameworks. Spinlocks become beneficial for preemptive multitasking processes during which a thread will operate in such an active loop instead of risking a rest queue latency. Mutexes become beneficial to utility lockers.

  • Solaris 2 employs flexible mutexes, indicating something like this on preemptive multitasking computers, the mutex is introduced with either a spinning switch.
  • Semaphores and state variations are much more effective methods for consistency where a commodity needs to be managed for such a prolonged period of time because spinning is unstable over a prolonged time.

8 0
2 years ago
XYZ Corp.’s facilities in Nashua, New Hampshire, are two office buildings 400 feet apart, each with its own LAN. To connect the
damaskus [11]

Answer:

a: Twisted pair won't span a 400-foot distance.

Explanation:

The maximum distance that twisted pair cables can support without attenuation is 100 meters which is approximately 328 feet and the two office buildings are 400 feet apart, so it is useless to install a twisted pair cable for such a large distance. A much better option would be to install optic fiber. Though it is a bit expensive but it is the best option in this case.

Hence option (a) is the correct reason for installing an optic fiber cable rather than a twisted pair cable.

6 0
2 years ago
Rene has secured her wireless network. However, she is worried about securing her router against newfound vulnerabilities. Which
Fynjy0 [20]
It is C I have a lot of experience with computers and technology
4 0
2 years ago
Temperature Class Write a Temperature class that will hold a temperature in Fahrenheit and provide methods to get the temperatur
posledela

Answer:

Explanation:

   public class Temperature

   {

       double ftemp;

       public int Constructor(double fahrenheit)

       {

           ftemp = fahrenheit;

          return Convert.ToInt32(ftemp);

       }

       public void setFahrenheit(double fahrenheit)

       {

           ftemp = fahrenheit;

       }

       public void getFahrenheit()

       {

           ftemp = Constructor(ftemp);

       }

       public void getCelcius()

       {

           ftemp = (ftemp - 32) * 5 / 9;

       }

       public void getKelvin()

       {

           ftemp = (ftemp - 32) * 5 / 9 + 273.15;

       }

   }

8 0
2 years ago
Assume there is a class AirConditioner that supports the following behaviors: turning the air conditioner on and off. The follow
Dafna11 [192]

Answer:

1)

officeAC = new AirConditioner();

officeAC.turnOn();

2)

officeAC = new AirConditioner();

officeAC.turnOn();

officeAC.setTemp(69);  

Explanation:

1)

In the first statement a new object of the class AirConditioner whose reference is assigned to the officeAC. new is a keyword which creates an object of the class.

Next statement uses the method turnOn(). Reference to the new object officeAC is used to invoke this method turnOn().

2) The first two statements works the same as in 1)

The last statement invokes a method setTemp() using the reference variable and passes the value 69 to this method to set the desired temperature.

6 0
2 years ago
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