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liq [111]
2 years ago
5

Some early computers protected the operating system by placing it in a memory partition that could not be modified by either the

user job or the operating system itself. Describe two difficulties that you think could arise with such a scheme.
Computers and Technology
1 answer:
Sav [38]2 years ago
5 0

Answer:

Check the explanation

Explanation:

1. Such operating systems cannot be modified and updating such OS (operating systems) would be almost impossible. This can prove fatal if we detect some serious bug, since there is no way to correct it.

2. The entire password and other credentials of users must be kept in an unsecure and vulnerable memory, since we can’t store it in the protected memory.

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2 years ago
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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
A bunch of computer scientists take over an island and start their own country. They want the license plates to use binary numbe
Thepotemich [5.8K]

Answer:

  • <em>Their country can support </em><u><em>   128   </em></u><em>unique license plates</em>

Explanation:

Since there is space for<em> 7 digits </em>on each <em>license plate</em>, the first plate starts at <em>0000000 </em>(seven 0).

<em>Binary numbers</em> contain only the digits 0 and 1.

Thus, there are only two possibilities for each digit.

Using the multiplication counting principle, the number of total different binary numbers, with seven digits is 2 multiplied seven times:

  • 2 × 2 × 2 × 2 × 2 × 2 × 2 = 2⁷ = 128 ← answer
5 0
2 years ago
Write a method named lastFirst that accepts a string as its parameter representing a person's first and last name. The method sh
Usimov [2.4K]

I'm going to assume this is Java, because you said "method" meaning it will be some sort of object oriented language, and Java's really common. Here would be the full program, but you can just take the method out isolated if you need it.

package lastname;

public class LastName {

   public static void main(String[] args) {

       // Example usage:

       String name = LastName.lastName("Garrett Acord");

       System.out.println(name);

       // Output: Acord G.

   }

   public static String lastName(String fullName)

   {

       String[] splitName = fullName.split(" ");

       return String.format("%s %s.", splitName[1], splitName[0].substring(0,1) );

       

   }

   

}

7 0
2 years ago
Ishmael would like to capture a selected portion of his screen and then capture actions he preforms on that selected portion. Wh
kompoz [17]

Answer:

Use the Insert Screen .

Explanation:

Remember, on most computer keyboard you'll find a button named "Insert Screen' which functions as a screenshot too. Also, note that if Ishmael is using Windows operating system he should simply do the following;

1. open the window you want to screenshot

2. click the Screenshot button

But to select a part of the screen he would need to use Screen Clipping which would allow him select the part of the window that he wants. ( It screen will look opaque)

3. the pointer would change to a cross, then he should press and hold the left mouse button and drag to select the part of the screen that he wants to capture.

5 0
2 years ago
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