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2 years ago

Angular when to use reactiveformsmodule.

Computers and Technology

1 answer:

WITCHER [35]2 years ago

3 0

Answer:

Image result for Angular when to use reactiveformsmodule.

In summaries, if forms are very important for your app, or reactive pattern are used in your app, you should use reactive forms. Otherwise your app have basic and simple requirement for forms such as sign in, you should use template-driven forms

Explanation:

Each form has a state that can be updated by many different interactions and its up to the application developer to manage that state and prevent it from getting corrupted. This can get hard to do for very large forms and can introduce a category of potential bugs

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Answer:

I will

Explanation:

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3 years ago

You need to pay an Internet Service Provider (ISP) for services rendered. Which payment technology would you use?

-Dominant- [34]

Answer:

D. Electronic Funds Transfer (EFT)

Explanation:

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A payment gateway can be defined as a merchant service technology used for the capturing, acceptance and transfer of digital payment from the bank account of a customer (buyer) to the bank account of the merchant (seller). Thus, payment gateway typically involves the use of credit or debit card for the payment of goods purchased or services provided.

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3 0

3 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

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3 years ago

In the SQL environment, a _____________ is a logical group of database objects – such as tables and indexes – that are related t

Paha777 [63]

Answer:Schema

Explanation: A schema is the group that contains objects of databases with views, index, triggers, tables etc features. The specific user can access schema who persist a certain username.The user is considered as the owner of the database and its element.

Schema is usually bound to have only single database.There are some schema that are already present in the system as the in-built schema .E.g.- sys, guest etc.

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3 years ago

Easy coding question, please help.

borishaifa [10]

Answers:

What is the index of the last element in the array? stArr1.length()-1

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Change line 7 to: i < names.length

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3 years ago