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luda_lava [24]
3 years ago
15

You have been hired by an educational software company to create a program that automatically calculates the sum of each place-v

alue of two numbers. You can assume that the user of this program will only enter positive whole numbers greater than zero and less than 10,000.

Computers and Technology
1 answer:
Vinvika [58]3 years ago
4 0

Hi, you haven't provided the programing language, therefore, we will use python but you can extend it to any programing language by reading the code and the explanation.

Answer:

n1 = int(input("First numeber: "))

n2 = int(input("Second numeber: "))

for i in range(5):

   r1 = n1%10

   r2 = n2%10

   print(r1+r2)

   n1 = n1//10

   n2 = n2//10

 

Explanation:

  1. First, we ask for the user input n1 and n2
  2. We create a for-loop to calculate the sum of each place-value of two numbers
  3. We obtain the last number in n1 by using the mod operator (%) an the number ten this way we can always take the last value, we make the same for n2
  4. Then we print the result of adding the last two numbers (place value)
  5. Finally, we get rid of the last value and overwrite n1 and n2 to continue with the process

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Disk requests come in to the disk driver for cylinders 10, 22, 20, 2, 40, 6, and 38, in that order. A seek takes 6 msec per cyli
oksano4ka [1.4K]

Answer:

For  FCFS = 876msec For SSTF = 360msec For SCAN(elevator) = 348msec

Explanation:

Considering FCFS algorithm.

In FCFS, the requests are addressed in the order they arrive in the disk queue, this means that the number of cylinders traveled becomes equal to the total of disk requests. With the arm initially at 20, the first request is to read cylinder 10.

Therefore the cylinders traversed for the first request = 20 – 10 = 10  

For the second request i.e. a movement from cylinder 10 to cylinder 22, the number of cylinders traversed is = 22 - 10 = 12.

Similarly, for the third request seek arm will return to 20 from 22 so, cylinders traversed through would be = 22-20 = 2.    

Also for the fourth request, cylinders traversed would be = 20 – 2 = 18.

For the fifth request, cylinders traversed = 40 – 2 = 38.

Now for the sixth request cylinders traversed = 40 – 6 = 34.

For the seventh and last request, cylinders traversed = 38 – 6 = 32.

So now to get the how much seek time is required for Disk scheduling algorithm  

First we would add the total cylinders traversed = 10 + 12 + 2+ 18+ 38 + 34 + 32

     = 146 cylinders  

So therefore the total seek time = number of cylinders traversed X seek time per cylinder

               = 146 X 6

   = 876msec

Considering SSTF algorithm.

In SSTF (Shortest Seek Time First), requests having shortest seek time are executed first. So, the seek time of every request is calculated in advance in the queue and then they are scheduled according to their calculated seek time. What this means is that the closest disk (cylinder) next to the position of the seek arm is attended to first. With   the arm at 20 initially, the first request is to read cylinder 22 (i.e. the closest cylinder to the seek arm)

Therefore the cylinders traversed for the first request = 22-20 = 2

For the second request, the disk to focus on is disk 20 and the cylinders traversed = 22-20 = 2

Similarly for the third request the seek arm will move to 10 from 20 so, cylinder traversed = 20-10 =10

For fourth request, cylinder traversed = 10 – 6 = 4

For the fifth request, cylinder traversed = 6 – 2 = 4

For sixth request, since all other disk request closer to it has been attended to the seek arm will move to disk 38 to attend to that disk request So, the cylinder traversed = 38 – 2 = 36

For the last request, cylinder traversed = 40 -38 = 2

So now to get the how much seek time is required for Disk scheduling algorithm  

First we would add the total cylinders traversed = 2 + 2 +10 + 4 + 4 + 36 + 2  

     = 60 cylinders

So therefore the total seek time = number of cylinders traversed X seek time per cylinder

     = 60 X 6 = 360msec

From Here we see that SSTF is better or an improvement to FCFS as it decrease the average response time (Average Response time is the response time of the all requests).

Considering SCAN (elevator) algorithm  

In SCAN algorithm the disk arm moves into a particular direction and services the requests coming in its path and after reaching the end of disk, it reverses its direction and again services the request arriving in its path. So, this algorithm works as an elevator and hence also known as elevator algorithm. Therefore the number of cylinder traveled becomes equal to the total of disk request. With the arm at 20 initially

The first request is to read cylinder 22 i.e. the first cylinder on the upward movement  

Therefore the cylinders traversed would be  =   20 – 22 = 2

For the second request is to read cylinder 38, and the cylinders traversed would be   = 38 – 22 =16

For the third request, seek arm will move to 40 So, the cylinders traversed would be = 40 – 38 = 2

For the fourth request, seek arm will return to 20 since from 40 since 40 is the highest in this upward elevator movement So, cylinders traversed would be = 40 -20 = 20  

For the fifth request, cylinder traversed would be = 20 – 10 = 10

For the sixth request, cylinder traversed would be   = 10 – 6 = 4

For the seventh and last request, cylinder traversed = 6 – 2 = 4

So now to get the how much seek time is required for Disk scheduling algorithm  

First we would add the total cylinders traversed = 2 + 16 + 2 + 20 +10+ 4 + 4 = 58 cylinders

So therefore the total seek time = number of cylinders traversed X seek time per cylinder

   = 58 X 6

          = 348msec

From Here we see that SCAN is better or an improvement to FCFS and SSTF as it decrease the average response time (Average Response time is the response time of the all requests).

6 0
3 years ago
Implement a Python function with the signature Transfer(S, T) that transfers all elements from the ArrayStack instance S onto th
Mashutka [201]

Answer:

Following are the program in the Python Programming Language.

#define function

def Transfer(S, T):

 #set for loop  

 for i in range(len(S)):

   #append in the list

   T.append(S.pop())

 #return the value of the list

 return T

#set list type variable

S = ["a","b","c","d"]

#print the values of the list

print(S)

#set the list empty type variable

T=[]

#call the function

T = Transfer(S, T)

#print the value of T

print(T)

<u>Output:</u>

['a', 'b', 'c', 'd']

['d', 'c', 'b', 'a']

Explanation:

Here, we define the function "Transfer()" in which we pass two list type arguments "S" and "T".

  • Set the for loop to append the values in the list.
  • Then, we append the value of the variable "S" in the variable "T".
  • Return the value of the list variable "T" and close the function.
  • Then, set the list data type variable "S" and initialize the elements in it and print that variable.
  • Finally, we set the empty list type variable "T" and store the return value of the function "Transfer()" in the variable "T" then, print the value of the variable "T".
4 0
3 years ago
How do most business applications and websites process credit card transactions?
klasskru [66]

Answer:

The answer to this question is given below in the explanation section.

Explanation:

Most business applications and websites use and process the credit card for their transaction.

For example, e-commerce website such as ali baba, am a zon, accepting credit card transaction when the customer gets to purchase any product from their stores. Their transactions are processed by in house credit card apps/service. But these apps/services owned by a third party. They just give you API services and related code to integrate the credit card services.  

By using their in-house credit card apps/services, they know that user has transferred the money into their account for the purchased product, upon receiving payment confirmation, they then prepare and dispatch the order.

So, the correct answer to this question is:

To process the credit card transactions, they license third-party credit card apps/services backed by the internet merchant who is responsible for handling and managing the money of the business account.    

6 0
3 years ago
Please answer this question correctly​
jeka94

Im only in 4th sorry i dont think i can help

5 0
3 years ago
A security engineer is configuring a wireless network that must support mutual authentication of the wireless client and the aut
rewona [7]

Answer:C) PEAP(Protected Extensible Authentication Protocol)

Explanation: PEAP(Protected Extensible Authentication Protocol) is the protocol that is used in point-to-point network connection and wireless network connection.It is the version of EAP(Extensible Authentication Protocol) with the advantage of protection to maintain the security.

Other options are incorrect because EAP-FAST is the EAP protocol with that has flexible authentication through secure tunneling, EAP-TLS is the EAP protocol with the transfer layer security and EAP is used for the expansion of authentication method for the network between internet and computer system.Thus, the correct option is option(c).

7 0
3 years ago
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