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3 years ago

Something that requests data from a server is known as a ____.

Computers and Technology

1 answer:

rosijanka [135]3 years ago

3 0

Answer:

It is called a client.

Explanation:

Any entity that request data from a centralized node in a network (which is called a server, because once received a request, it replies sending the requested piece of data back to the requester) is called a client.

The server can adopt different names based on its role: It can be a file server, an application server, a web server, a mail server etc.

This sharing information paradigm, where the resources are located in one host (server) to be distributed to many hosts (clients) is called client-server model.

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List three types of cardinalities for relationships within a relational database.

Afina-wow [57]

This is about identifiers in a record referring to other records.
You can have many to one, one to one, many to many.

E.g., if you have two tables, Authors and Books, then a book record could have a reference to an author record. Since an author can write many books, this would be a many-to-one relationship.

3 0

3 years ago

. SQL is a(n) _____ language.

Blababa [14]

Answer: Fourth- generation language

Explanation:Structured Query Language (SQL) is the language that is in the form of database structure which helps in the manipulation of the data and management as well.

SQL is considered as the fourth generation language because it is used for the accessing of the data from the database.It is also known for the advancement in the third generation language and thus also improving the language interface with users.

7 0

3 years ago

A computer retail store has 15 personal computers in stock. A buyer wants to purchase 3 of them. Unknown to either the retail st

Dima020 [189]

Answer:

a. 1365 ways

b. Probability = 0.4096

c. Probability = 0.5904

Explanation:

Given

PCs = 15

Purchase = 3

Solving (a): Ways to select 4 computers out of 15, we make use of Combination formula as follows;

$^nC_r = \frac{n!}{(n-r)!r!}$

Where $n = 15\ and\ r = 4$

$^{15}C_4 = \frac{15!}{(15-4)!4!}$

$^{15}C_4 = \frac{15!}{11!4!}$

$^{15}C_4 = \frac{15 * 14 * 13 * 12 * 11!}{11! * 4 * 3 * 2 * 1}$

$^{15}C_4 = \frac{15 * 14 * 13 * 12}{4 * 3 * 2 * 1}$

$^{15}C_4 = \frac{32760}{24}$

$^{15}C_4 = 1365$

Hence, there are 1365 ways 

Solving (b): The probability that exactly 1 will be defective (from the selected 4)

First, we calculate the probability of a PC being defective (p) and probability of a PC not being defective (q)

From the given parameters; 3 out of 15 is detective;

So;

$p = 3/15$

$p = 0.2$

$q = 1 - p$

$q = 1 - 0.2$

$q = 0.8$

Solving further using binomial;

$(p + q)^n = p^n + ^nC_1p^{n-1}q + ^nC_2p^{n-2}q^2 + .....+q^n$

Where n = 4

For the probability that exactly 1 out of 4 will be defective, we make use of

$Probability = ^nC_3pq^3$

Substitute 4 for n, 0.2 for p and 0.8 for q

$Probability = ^4C_3 * 0.2 * 0.8^3$

$Probability = \frac{4!}{3!1!} * 0.2 * 0.8^3$

$Probability = 4 * 0.2 * 0.8^3$

$Probability = 0.4096$

Solving (c): Probability that at least one is defective;

In probability, opposite probability sums to 1;

Hence;

Probability that at least one is defective + Probability that at none is defective = 1

Probability that none is defective is calculated as thus;

$Probability = q^n$

Substitute 4 for n and 0.8 for q

$Probability = 0.8^4$

$Probability = 0.4096$

Substitute 0.4096 for Probability that at none is defective

Probability that at least one is defective + 0.4096= 1

Collect Like Terms

Probability = 1 - 0.4096

Probability = 0.5904

8 0

3 years ago

Reed Hastings created Netflix. His inspiration came from the fact that he had to pay a sizeable late fee for returning a DVD bey

noname [10]

Answer:

Which statement accurately describes his key to success?

Explanation:

The success in Netflix lies in offering:

1. Entertainment;

2. fun;

3. originality;

4. innovation and

5. happiness.

Netflix learning is:

1. Bet on your content.

2. Brand Personality.

3. Visual universe.

4. Customization

5. Big Data helps Netflix continue to grow and improve customer service.

3 0

3 years ago

Making phone calls with a public box

AfilCa [17]

Answer:

ja ok it is so eassssy.........................

8 0

3 years ago