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Leno4ka [110]
3 years ago
9

You manage a Ruby on Rails application that lives on a cluster of EC2 instances. Your website occasionally experiences brief, st

rong, and entirely unpredictable spikes in traffic that overwhelm your EC2 instances' resources and freeze the application. As a result, you're losing recently submitted requests from end users. You use Auto Scaling to deploy additional resources to handle the load during spikes, but the new instances don't spin-up fast enough to prevent the existing application servers from freezing. Which of the following will provide the most cost-effective solution in preventing the loss of recently submitted requests?
A. Keep a large EC2 instance on standby.
B. Increase the size of your existing EC2 instances.
C. Ask AWS support to pre-warm the Elastic Load Balancer.
D. Use Amazon SQS to decouple the application components and keep the requests in queue until the extra Auto-Scaling instances are available."
Computers and Technology
1 answer:
KIM [24]3 years ago
5 0

Answer:

Option D Use Amazon SQS to decouple the application components and keep the requests in queue until the extra Auto-Scaling instances are available.

Explanation:

Amazon SQS is a service that user to decouple the application components and keep the request in queue. This is useful to ensure the distribution of message can be done more reliably and without losing the message. Amazon SQS increase the system fault tolerance. Multiple duplicated copies of the message will be stored across several availability zones to ensure the message are always available whenever it is needed.

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In a PERT network, non-critical activities that have little slack need to be monitored closely
kozerog [31]

Answer: b)because near-critical paths could become critical paths with small delays in these activities

Explanation: Program evaluation and review technique(PERT) technique is used for management of the project .The organizing, maintenance,coordination of any task is done by this chart. The non-critical activities need to be observed carefully because they may create near-critical methods which can lead to complexity.

Other options are incorrect because not all activities are equally rather monitoring is done to avoid errors and slack can occur at any path . Small delays can be caused but not complete project can get delayed and there can be risk of complexity rather than being uncompleted.Thus, the correct option is option(b).

6 0
4 years ago
Determine whether the compound condition is True or False.
Vlada [557]

The  compound condition are:

  • 7<12 or 50!=10 is false
  • 7<12 and 50<50 is false
  • not (8==3) is true

<h3>What is compound condition?</h3>

A compound statement is known to be one that shows up as the body of another statement, e.g. as in if statement.

The  compound condition are:

  • 7<12 or 50!=10 is false
  • 7<12 and 50<50 is false
  • not (8==3) is true

Learn more about compound condition  from

brainly.com/question/18450679

#SPJ1

8 0
2 years ago
"Write an iterative function iterPower(base, exp) that calculates the exponential baseexp by simply using successive multiplicat
sp2606 [1]

Answer:

I am writing the function using Python. Let me know if you want the program in some other programming language.            

def iterPower(base, exp):    

    baseexp = 1

    while exp > 0:

        baseexp = baseexp*base

        exp= exp - 1

    return baseexp

base = 3

exp = 2

print(iterPower(base, exp))

Explanation:

  • The function name is iterPower which takes two parameters base and exp. base variable here is the number which is being multiplied and this number is multiplied exponential times which is specified in exp variable.
  • baseexp is a variable that stores the result and then returns the result of successive multiplication.
  • while loop body keeps executing until the value of exp is greater than 0. So it will keep doing successive multiplication of the base, exp times until value of exp becomes 0.
  • The baseexp keeps storing the multiplication of the base and exp keeps decrements by 1 at each iteration until it becomes 0 which will break the loop and the result of successive multiplication stored in baseexp will be displayed in the output.
  • Here we gave the value of 3 to base and 2 to exp and then print(iterPower(base, exp)) statement calls the iterPower function which calculates the exponential of these given values.
  • Lets see how each iteration works:
  • 1st iteration

baseexp = 1

exp>0 True because exp=2 which is greater than 0

baseexp = baseexp*base

               = 1*3 = 3

So baseexp = 3

exp = exp - 1

      = 2 - 1 = 1    

exp = 1

  • 2nd iteration

baseexp = 3

exp>0 True because exp=1 which is greater than 0

baseexp = baseexp*base

               = 3*3 = 9

So baseexp = 9

exp = exp - 1

      = 1-1 = 0    

exp = 0

  • Here the loop will break now when it reaches third iteration because value of exp is 0 and the loop condition evaluates to false now.
  • return baseexp statement will return the value stored in baseexp which is 9
  • So the output of the above program is 9.
5 0
3 years ago
3.29 LAB: Login name Write a program that creates a login name for a user, given the user's first name, last name, and a four-di
romanna [79]

Answer:

In C++:

#include <iostream>

using namespace std;

int main(){

   string fname,lname; int num;

   cout<<"Firstname: "; cin>>fname;

   cout<<"Lastname: "; cin>>lname;

   cout<<"4 digits: "; cin>>num;

   string login = lname;

   if(lname.length()>=5){

       login = lname.substr(0, 5);    }

   login+=fname.substr(0,1)+to_string(num%100);

   cout<<login;

   return 0;

}

Explanation:

See attachment for explanation where I used comments to explain each line

Download cpp
4 0
3 years ago
What are some of the challenges that could arise from setting up a file management system on a computer?
kherson [118]
YOU COULD POTTENTIALLY HAVE TO WIPE ALL CURRENT FILES CLEAN OR U MAY HAVE TO PAY FOR CERTAIN PROGRAMS
7 0
4 years ago
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