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kipiarov [429]
2 years ago
9

Why is accessing a disk block expensive? discuss the time components involved in accessing a disk block. (?

Computers and Technology
1 answer:
Dahasolnce [82]2 years ago
6 0

Answer:

Explanation:

A disk block works by transferring data between the disk and main memory units which are called the blocks, whose size can range drastically from 512 bytes to several thousand.  This data is converted to hardware-level cylinder, surface, and sector number  which makes accessing the data immensely slower than accessing data in the main memory. This time constraint is also the main reason as to why accessing a disk block is so expensive.

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Write a program FindDuplicate.java that reads n integer arguments from the command line into an integer array of length n, where
kozerog [31]

Answer:

  1. public class FindDuplicate{
  2.    public static void main(String[] args) {
  3.        Scanner input = new Scanner(System.in);
  4.        int n = 5;
  5.        int arr[] = new int[n];
  6.        for(int i=0; i < arr.length; i++){
  7.            int inputNum = input.nextInt();
  8.            if(inputNum >=1 && inputNum <=n) {
  9.                arr[i] = inputNum;
  10.            }
  11.        }
  12.        for(int j =0; j < arr.length; j++){
  13.            for(int k = 0; k < arr.length; k++){
  14.                if(j == k){
  15.                    continue;
  16.                }else{
  17.                    if(arr[j] == arr[k]){
  18.                        System.out.println("True");
  19.                        return;
  20.                    }
  21.                }
  22.            }
  23.        }
  24.        System.out.println("False");
  25.    }
  26. }

Explanation:

Firstly, create a Scanner object to get user input (Line 4).

Next, create an array with n-size (Line 7) and then create a for-loop to get user repeatedly enter an integer and assign the input value to the array (Line 9 - 14).

Next, create a double layer for-loop to check the each element in the array against the other elements to see if there is any duplication detected and display "True" (Line 21 - 22). If duplication is found the program will display True and terminate the whole program using return (Line 23). The condition set in Line 18 is to ensure the comparison is not between the same element.

If all the elements in the array are unique the if block (Line 21 - 23) won't run and it will proceed to Line 28 to display message "False".

7 0
2 years ago
Write a class named Employee that has private data members for an employee's name, ID_number, salary, and email_address. It shou
mario62 [17]

Solution :

class Employee:

   #Define the

   #constructor.

   def __$\text{init}$__($\text{self, nam}e$,  ID_number, $\text{salary}$, email):

       #Set the values of

       #the data members of the class.

       $\text{self.nam}e$ = name

       $\text{self.ID}$_number = ID_number

       $\text{self.salary}$ = salary

       self.email_address = email

#Define the function

#make_employee_dict().

def make_employee_dict(list_names, list_ID, list_salary, list_email):

   #Define the dictionary

   #to store the results.

   employee_dict = {}

   #Store the length

   #of the list.

   list_len = len(list_ID)

   #Run the loop to

   #traverse the list.

   for i in range(list_len):

       #Access the lists to

       #get the required details.

       name = list_names[i]

       id_num = list_ID[i]

       salary = list_salary[i]

       email = list_email[i]

       #Define the employee

       #object and store

       #it in the dictionary.

       employee_dict[id_num] = Employee(name, id_num, salary, email)

   #Return the

   #resultant dictionary.

   return employee_dict

6 0
2 years ago
There are 10 red apples and 12 green apples in a basket. If Vinta randomly selects 3 apples from the basket, what is the probabi
denpristay [2]

Answer:

12/22

Explanation:

As there are 22 apples in total and 12 green it is 12/22.

5 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
(1) Prompt the user to enter two words and a number, storing each into separate variables. Then, output those three values on a
denpristay [2]

Answer:Prompt the user to enter two words and a number, storing each into separate variables. Then, output those three values on a single line separated by a space. (Submit for 1 point) Ex: If the input is: yellow Daisy 6 the output after the prompts is: You entered: yellow Daisy 6 Note: User input is not part of the program output. (2) Output two passwords using a combination of the user input. Format the passwords as shown below. (Submit for 2 points, so 3 points total). Ex: If the input is: yellow Daisy 6 the output after the prompts is: You entered: yellow Daisy 6 First password: yellow_Daisy Second password: 6yellow6 (3) Output the length of each password (the number of characters in the strings). (Submit for 2 points, so 5 points total). Ex: If the input is: yellow Daisy 6 the output after the prompts is: You entered: yellow Daisy 6 First password: yellow_Daisy Second password: 6yellow6 Number of characters in yellow_Daisy: 12 Number of characters in 6yellow6: 8

I have tried several different ways of doing this, but I keep getting an error on line 6

Explanation:

7 0
2 years ago
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