Describing the technologies used in diffrent generation of computer

_____ provide the standards, syntax, statements, and instructions for writing computer software

miv72 [106K]

Programming languages provide the standards, syntax, statements, and instructions for writing computer software.
It is a vocabulary and set of grammatical rules. These rules are used for instructing a computer or computing device to perform specific tasks and produce a certain output.

4 0

3 years ago

Which of the selections below represents a recursive query?

ElenaW [278]

Answer:

D. A DNS server asks another DNS server to resolve a domain name

Explanation:

DNS (Domain name system) queries are essentially of two types;

i. recursive address resolution

ii. iterative or non-recursive address resolution

=> In the recursive address resolution, which represents a recursive query, when a DNS server A, receives a request from a client and does not know how to resolve such request, the DNS server sends the query to another DNS server B on behalf of this client. DNS server B can either reply to the query with the actual answer or an error message. If it's an actual answer, it returns to the client. Otherwise, it queries another DNS server, say C.

=> In the iterative address resolution, once the DNS server A receives a request from the client, it tries to reply the client with the best answer it can give. If the DNS server A does not have an answer, it refers the client to another DNS server say B. In this case, the server A does not directly query the server B. Instead, it refers the client to the server B.

5 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

6 0

3 years ago

When saving a document or drawing, you determine the destination folder in which the file will be saved by?

bekas [8.4K]

making a selection in the Save in: box.

8 0

3 years ago

Peter works on a huge database of numerical figures in a worksheet ranging from cell A1 to cell I50. He has to print the workshe

bekas [8.4K]

Answer:

Landscape or vertical page orientation

Explanation:

In landscape he can mange the number of cell that are required to print on A4 page size.

On landscape orientation of the page we can add more columns of the sheet. That is the reason, we should choose landscape or horizontal page orientation to adjust all columns on the single page.

8 0

3 years ago

Read 2 more answers

Describing the technologies used in diffrent generation of computer​

Describing the technologies used in diffrent generation of computer