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3 years ago

Difference between system and software development life cycle

Computers and Technology

1 answer:

umka2103 [35]3 years ago

3 0

Answer:

Software development life cycle is about building a software (“only”) in a phased approach systematically.

System development life cycle is about implementing hardware and software in a phased manner systematically.

Explanation:

Here both the hardware and the software is considered as a system.

Hope this helps!

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Describe the procedure for creating a table or spreadsheet in a presentation slide.

brilliants [131]

Select the slide that you want to insert a table on.On the Insert tab, in the Tables group, click Table, and then click Excel Spreadsheet.To add text to a table cell, click the cell, and then enter your text

5 0

2 years ago

Oxnard Casualty wants to ensure that their e-mail server has 99.98 percent reliability. They will use several independent server

sattari [20]

Answer:

The smallest number of servers required is 3 servers

Explanation:

Given

$Reliability = 99.98\%$

$Individual Servers = 95\%$

Required

Minimum number of servers needed

Let p represent the probability that a server is reliable and the probability that it wont be reliable be represented with q

Such that

$p = 95\%\\$

It should be noted that probabilities always add up to 1;

So,

$p + q = 1$ '

Subtract p from both sides

$p - p + q = 1 - p$

$q = 1 - p$

Substitute $p = 95\%\\$

$q = 1 - 95\%$

Convert % to fraction

$q = 1 - \frac{95}{100}$

Convert fraction to decimal

$q = 1 - 0.95$

$q = 0.05$

------------------------------------------------------------------------------------------------

To get an expression for one server

The probabilities of 1 servers having 99.98% reliability is as follows;

$p = 99.98\%$

Recall that probabilities always add up to 1;

So,

$p + q = 1$

Subtract q from both sides

$p + q - q = 1 - q$

$p = 1 - q$

So,

$p = 1 - q = 99.98\%$

$1 - q = 99.98\%$

Let the number of servers be represented with n

The above expression becomes

$1 - q^n = 99.98\%$

Convert percent to fraction

$1 - q^n = \frac{9998}{10000}$

Convert fraction to decimal

$1 - q^n = 0.9998$

Add $q^n$ to both sides

$1 - q^n + q^n= 0.9998 + q^n$

$1 = 0.9998 + q^n$

Subtract 0.9998 from both sides

$1 - 0.9998 = 0.9998 - 0.9998 + q^n$

$1 - 0.9998 = q^n$

$0.0002 = q^n$

Recall that $q = 0.05$

So, the expression becomes

$0.0002 = 0.05^n$

Take Log of both sides

$Log(0.0002) = Log(0.05^n)$

From laws of logarithm $Loga^b = bLoga$

So,

$Log(0.0002) = Log(0.05^n)$ becomes

$Log(0.0002) = nLog(0.05)$

Divide both sides by $Log0.05$

$\frac{Log(0.0002)}{Log(0.05)} = \frac{nLog(0.05)}{Log(0.05)}$

$\frac{Log(0.0002)}{Log(0.05)} = n$

$n = \frac{Log(0.0002)}{Log(0.05)}$

$n = \frac{-3.69897000434}{-1.30102999566}$

$n = 2.84310893421$

$n = 3 (Approximated)$

Hence, the smallest number of servers required is 3 servers

6 0

2 years ago

Write a program that reads 20 integers from the user into an array and uses a function arrayMinimum that accepts an integer arra

neonofarm [45]

Answer:

#include <iostream>

using namespace std;

int arrayMinimum(int myArray[], int myArraySize) {

int small = myArray[0];

for (int i = 0; i < myArraySize; i++) {

if(myArray[i]<small){

small = myArray[i];

}

return small;

}

int main(){

int myArray[20];

for(int i =0;i<20;i++){

cin>>myArray[i];

}

cout<<"The smallest is: "<<arrayMinimum (myArray,20);

return 0;

}

Explanation:

This solution is provided in c++

#include <iostream>

using namespace std;

This line defines the arrayMinimum function

int arrayMinimum(int myArray[], int myArraySize) {

This initializes the smallest of the array element to the first

int small = myArray[0];

This iterates through the array

for (int i = 0; i < myArraySize; i++) {

This if condition checks for the smallest

if(myArray[i]<small){

The smallest is assigned to the small variable

small = myArray[i];

}

This returns the smallest

return small;

}

The main method begins here

int main(){

This declares an array of 20 elements

int myArray[20];

The following iteration allows user input into the array

for(int i =0;i<20;i++){

cin>>myArray[i];

}

This calls the method and returns the minimum

cout<<"The smallest is: "<<arrayMinimum (myArray,20);

return 0;

}

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2 years ago

.true or false? one disadvantage of cloudware is that it is never free A. true B. false

ser-zykov [4K]

Answer:

true

Explanation:

cloudware is used for many reasons and It is sometimes too much of an expense to the company

7 0

2 years ago

Describe the basic features of the relational data model and discuss their importance to the end user and the designer. Describe

Mandarinka [93]

Answer:

The answer to this question can be described as follows:

Explanation:

Relational data model:

The use of data tables to organize sets of entities into relationships requires a relational data model. this model work on the assumption, which is a primary key or code, that is included in each table configuration. The symbol for "relational" data links and information is used by other tables.

Model Design:

This model is used for database management, it consists of structure and language consistency. It is design in 1969.

Importance of data model:

This provides a common standard for processing the potentially sound data in machines, that was usable on almost any one device.

Big Data:

It moves to locate new and innovative ways to handle large volumes of authentication tokens and to gather business insights when offering high efficiency and usability at an affordable cost at the same time.

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3 years ago