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Alex
3 years ago
15

In a server farm such as that used by Amazon or eBay, a single failure does not cause the entire system to crash. Instead, it wi

ll reduce the number of requests that can be satisfied at any one time. If a company has 10,000 computers, each with a MTTF of 35 days, and it experiences catastrophic failure only if 1/3 of the computers fail, what is the MTTF for the system? (Assume that computers are not repaired.)
Computers and Technology
1 answer:
Jet001 [13]3 years ago
8 0

Answer:12 days

Explanation:

Mean time to failure is given by

MTTF=\frac{Total working hours of running}{Total no. of units}

Let's say N is the average amount  of time system runs until \frac{1}{3} computer fail

MTTF of each computer =35

35=\frac{n\cdot 10,000}{10,000\cdot \frac{1}{3}}

35=N\cdot 3

N=\frac{35}{3}=11.667\approx 12days

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A professional-looking portfolio gives a clear message. What does it convey?
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Answer:a

Explanation:

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3 years ago
C source files natively compiled on a Linux system using an ARM processor produce an executable file only runnable on ARM machin
Bumek [7]

Answer:

b. False.

Explanation:

Linux system is an operating system just like windows. Android is powered by Linux which is one of the most popular operating systems in Smart phones. Linux operating system was released in 1991, but it gained significance in 20th century. ARM processor can produce executable file on ARM machine with Linux system using x86 chipset.

3 0
3 years ago
“If the information ______________________, then that information (should / should not) be stored because _____________. For exa
lisov135 [29]

The blanks spaces are filled with the following;

  1. Is confidential, should not
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  3. Social security number, should not

<h3>Confidential information and the storage cloud</h3>

According to McGinley, in some cases, storing any type of personal information for one's self or one's customers in the cloud would be a mistake. Information relating to date of birth, Social Security number, passport numbers should not be kept in the cloud.

This follows from the fact that "Cloud providers are no less bulletproof than any of the other previous industry."

Read more on information storage;

brainly.com/question/24688176

5 0
3 years ago
This is a program that calculates information about orders of shirts and pants. All orders have a quantity and a color. Write a
LuckyWell [14K]

Answer:

Check the explanation

Explanation:

// Clothing.java

public class Clothing {

//Declaring instance variables

private int quantity;

private String color;

//Zero argumented constructor

public Clothing() {

this.quantity = 0;

this.color = "";

}

//Parameterized constructor

public Clothing(int quantity, String color) {

this.quantity = quantity;

this.color = color;

}

// getters and setters

public int getQuantity() {

return quantity;

}

public void setQuantity(int quantity) {

this.quantity = quantity;

}

public String getColor() {

return color;

}

public void setColor(String color) {

this.color = color;

}

public double calculatePrice()

{

return 0.0;

}

}

_____________________________

// Pants.java

public class Pants extends Clothing {

//Declaring instance variables

private int waist;

private int inseam;

//Zero argumented constructor

public Pants() {

this.waist = 0;

this.inseam = 0;

}

//Parameterized constructor

public Pants(int quantity, String color, int waist, int inseam) {

super(quantity, color);

setWaist(waist);

setInseam(inseam);

}

// getters and setters

public int getWaist() {

return waist;

}

public void setWaist(int waist) {

if (waist > 0)

this.waist = waist;

}

public int getInseam() {

return inseam;

}

public void setInseam(int inseam) {

if (inseam > 0)

this.inseam = inseam;

}

public double calculatePrice() {

double tot = 0;

if (waist > 48 || inseam > 36) {

tot = 65.50;

} else {

tot = 50.0;

}

return tot;

}

}

__________________________

// Shirt.java

public class Shirt extends Clothing {

//Declaring instance variables

private String size;

//Zero argumented constructor

public Shirt() {

this.size = "";

}

//Parameterized constructor

public Shirt(int quantity, String color, String size) {

super(quantity, color);

this.size = size;

}

// getters and setters

public String getSize() {

return size;

}

public void setSize(String size) {

this.size = size;

}

public double calculatePrice() {

double tot = 0;

if (size.equalsIgnoreCase("S")) {

tot = getQuantity() * 11.00;

} else if (size.equalsIgnoreCase("M")) {

tot = getQuantity() * 12.50;

} else if (size.equalsIgnoreCase("L")) {

tot = getQuantity() * 15.00;

} else if (size.equalsIgnoreCase("XL")) {

tot = getQuantity() * 16.50;

} else if (size.equalsIgnoreCase("XXL")) {

tot = getQuantity() * 18.50;

}

return tot;

}

}

___________________________

//Test.java

import java.util.ArrayList;

public class Test {

public static void main(String[] args) {

int totShirts=0,totPants=0;

double sprice=0,pprice=0,totWaist=0,totinseam=0,avgWaist=0,avginseam=0;

int cnt=0;

ArrayList<Clothing> clothes=new ArrayList<Clothing>();

Shirt s=new Shirt(8,"Green","XXL");

Pants p1=new Pants(6,"Brown",48,30);

Pants p2=new Pants(4,"Blue",36,34);

clothes.add(s);

clothes.add(p1);

clothes.add(p2);

for(int i=0;i<clothes.size();i++)

{

if(clothes.get(i) instanceof Shirt)

{

Shirt s1=(Shirt)clothes.get(i);

totShirts+=s1.getQuantity();

sprice+=s1.calculatePrice();

}

else if(clothes.get(i) instanceof Pants)

{

Pants pa=(Pants)clothes.get(i);

totPants+=pa.getQuantity();

pprice+=pa.calculatePrice();

totinseam+=pa.getInseam();

totWaist+=pa.getWaist();

cnt++;

}

}

System.out.println("Total number of shirts :"+totShirts);

System.out.println("Total price of Shirts :"+sprice);

System.out.println("Total number of Pants :"+totPants);

System.out.println("Total price of Pants :"+pprice);

System.out.printf("Average waist size is :%.1f\n",totWaist/cnt);

System.out.printf("Average inseam length is :%.1f\n",totinseam/cnt);

 

}

}

_________________________

Output:

Total number of shirts :8

Total price of Shirts :148.0

Total number of Pants :10

Total price of Pants :100.0

Average waist size is :42.0

Average inseam length is :32.0

4 0
4 years ago
Assume that you have an ArrayList variable named a containing 4 elements, and an object named element that is the correct type t
jonny [76]

Answer:

Option (4) is the correct answer.

Explanation:

In Java programming language ,array collection starts from 0 index location and ends in a size-1 index location. So to access the last elements the user needs to use a[Size-1] statement. so to modify the value of the last location of the array the user needs to use "a[size-1]= element;".

But when the user wants to add some new value to the end of the array list collection then he needs to use the statement--

a.add(element); //where add is a function, element is a value and a is a array list object.

Another option is invalid because--

  • Option 1 is not the correct because "a[3]=element;" modify the value of the 3rd element of the array.
  • Option 2 gives a compile-time error because add functions bracts are not closed.
  • Option 3 gives the error because a[4] gives the location of the 5th element of the array but the above question says that a is defined with 4 elements.
7 0
3 years ago
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