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3 years ago

Write the line of code to calculate the area of a circle with radius 3 and store it in a variable called

Computers and Technology

1 answer:

zloy xaker [14]3 years ago

3 0

Answer:

area = 2.14 * 3 ** 2

Explanation:

No clue what language you use but this should be pretty universal. To find the area of a circle you use pi(r) ^ 2 or pi times radius squared

$\pi r^{2}$

In python it looks like this:

>>> area = 3.14 * 3 ** 2

>>> print(area)

28.26 <Printed text

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You are implementing a RAID storage system and have found a system with eight 100 GB drives. How much storage space will you hav

asambeis [7]

Answer:

The space available will vary between 800 GB (100%) and 400 GB (50%) of the total disks, depending on the RAID level.

The OS will handle the RAID as a single disk.

Explanation:

Each RAID level implements parity and redundancy in a different way, so the amount of disks used for this extra information will reduce the space available for actual storage.

Usual RAID levels are:

RAID 0: does not implement any redundancy or parity, so you will have available 100% of the total storage: 8 x 100 GB = 800 GB

RAID 1: Duplicates all the information in one disk to a second disk. Space is reduced in half: 400 GB

RAID 5: Uses the equivalent of 1 disk of parity data distributed evenly on each disk, meaning the space available is $\frac{n-1}{n}$ of the total disks: $\frac{7}{8}$ of 800 GB = 700 GB

Writting and reading the information on a RAID storage is handled by a raid controller, either implemented in hardware or software. The OS will "see" a single disk and will read or write information as usual.

4 0

3 years ago

ShellShock had the potential for an unauthorized user to gain access to a server. It affected many internet-facing services, whi

mina [271]

Answer: Windows

Explanation:

ShellShock: Also called Bashdoor, it is a security bug which is found in the Bash shell of operating system e.g. Unix. It allows the hacker to execute scripts and commands by gaining unauthorized access. This affects many machines, devices that use Bash. Servers like web servers are most affected as most of them run Unix based OS like OS X. Most vulnerable are those who use Unix or Linux operating systems.

Microsoft Windows does not use Bash so it does not directly affect Windows os. For those who are using Windows PC, Windows phones and websites that are developed by MS software are non-vulnerable to ShellShock.

4 0

3 years ago

Notice that the percentages range from just over 55% to just under 65%. This is a range of 10%, so we're going to use 5 evenly-s

vfiekz [6]

Answer:

import numpy as np

l_int = 55/100

h_int = 65/100

hist = np.histogram( paid_tax_preparers_list, bins=5, range=(l_int, h_int))

Explanation:

Numpy is a Python package used to ease mathematical and statistical research calculations. The package creates data structures called arrays that can be used as vector items, making it easy and fast for calculation to be done.

The np.histogram method is used to create or plot histograms of a list or array against the frequency of the items in the array. The bins and the range attributes are used to adjust the display of the histogram, with bins being the number of bin in the graph and range is the given length of the histogram.

7 0

3 years ago

Debug

Snowcat [4.5K]

Wait what’s the question tho??

6 0

3 years ago

Conceptos importantes de red de computadoras

Bumek [7]

Answer:

-Consiste en conectar varias redes de computadoras basadas en diferentes protocolos -Requiere la definición de un protocolo de interconexión común sobre los protocolos locales. -El Protocolo de Internet (IP) desempeña este papel, definiendo direcciones únicas para una red y una máquina host.

3 0

3 years ago