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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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Java uses interfaces to provide the benefits of multiple inheritance. A superclass object is a subclass object. A subclass is of
WITCHER [35]

COMPLETE QUESTION

Which of the following is false?

a. A subclass is often larger than its super class.

b. A super class is object is a subclass object.

c. The class following the extends keyword in a class declaration is that direct super class of the class being declared.

d. Java uses interfaces to provide the benefits of multiple inheritance

Answer:

B) A super class is object is a subclass object.

Explanation:

In object oriented programming, the concept of inheritance is greatly utilized, this refers to deriving a class from another class. The derived class is the sub-class and it is derived from its super class, as a matter of fact in Java programming language, all classes are derived from some other class. Objects are made from classes with their state (fields) and behavior (methods) since objects are made from classes, the objects of the super class will not be the same as that of the subclass.

4 0
2 years ago
Allison wants to use equations to simplify the process of explaining something to the Sales team, but the default eq
yarga [219]

Answer:

Search for something that fits her needs

Explanation:

There are several approaches to problem solving, the approach that will be employed depends on our definition of the problem. Not all processes can be modeled by mathematical equations, some processes are simply theoretical and can be explained by simple logic.

If Allison does not find the needed equations among the available default equations, she can come up with an equation that addresses the process at hand. If she cannot come up with any, she can use other approaches that fit her needs to explain the required concept to the team.

7 0
2 years ago
Read 2 more answers
A student made a model of isostasy by placing a block of wood in a beaker of water. What does the wooden block represent in the
Komok [63]
I am almost positive the answer is B, Earth's crust. I know it cannot be A or C because isostasy has nothing to do with sea level or glaciers, and Earth's mantle is inside.
7 0
2 years ago
Read 2 more answers
Locker doors There are n lockers in a hallway, numbered sequentially from 1 to n. Initially, all the locker doors are closed. Yo
kow [346]

Answer:

// here is code in C++

#include <bits/stdc++.h>

using namespace std;

// main function

int main()

{

   // variables

   int n,no_open=0;

   cout<<"enter the number of lockers:";

   // read the number of lockers

   cin>>n;

   // initialize all lockers with 0, 0 for locked and 1 for open

   int lock[n]={};

   // toggle the locks

   // in each pass toggle every ith lock

   // if open close it and vice versa

   for(int i=1;i<=n;i++)

   {

       for(int a=0;a<n;a++)

       {

           if((a+1)%i==0)

           {

               if(lock[a]==0)

               lock[a]=1;

               else if(lock[a]==1)

               lock[a]=0;

           }

       }

   }

   cout<<"After last pass status of all locks:"<<endl;

   // print the status of all locks

   for(int x=0;x<n;x++)

   {

       if(lock[x]==0)

       {

           cout<<"lock "<<x+1<<" is close."<<endl;

       }

       else if(lock[x]==1)

       {

           cout<<"lock "<<x+1<<" is open."<<endl;

           // count the open locks

           no_open++;

       }

   }

   // print the open locks

   cout<<"total open locks are :"<<no_open<<endl;

return 0;

}

Explanation:

First read the number of lockers from user.Create an array of size n, and make all the locks closed.Then run a for loop to toggle locks.In pass i, toggle every ith lock.If lock is open then close it and vice versa.After the last pass print the status of each lock and print count of open locks.

Output:

enter the number of lockers:9

After last pass status of all locks:

lock 1 is open.

lock 2 is close.

lock 3 is close.

lock 4 is open.

lock 5 is close.

lock 6 is close.

lock 7 is close.

lock 8 is close.

lock 9 is open.

total open locks are :3

5 0
2 years ago
Type two statements.
UNO [17]

Answer:

Following are the program in Python langauge

person_name = input() # Read the person name by the user

person_age=0  #declared a vaiable person_age  

person_age = int(input()) # read person_age by the user

person_age=person_age+5  # add 5 to person_age

print('In 5 years',person_name,'will be',person_age) # display the output

Output:

  Amy

   4

   In 5 years Amy will be 9

Explanation :

Following is the description of code:

  • Read the value of the "person_name" variable by the user by using the input function.
  • Declared a variable person_age and initialized 0 with them.
  • Read the value of "person_age" variable by user by using input function and convert into int by using int function
  • Add 5 to "person_age" variable and store again them into the "person_age" variable.
  • Finally, display the output which is mention in the question.
7 0
2 years ago
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