The logging system which has replaced the journaling database system for use in recording messages that are normally stored within the boot.log is Journald.
What is Journald?Journald refers to a logging system service which allows for messages to be stored and does so in an easier way so that system administrators can find relevant and interesting information when they look through log messages.
In the past, these messages that Journald now stores would have been stored in boot.log, messages, and syslog files but thanks to Journald using the special file format which is made especially for log messages, this has changed.
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44.4% complete Question A hacker, wanting to gain data on organizational ideas and inventions, uses a spear-phishing attack by creating a believable email containing malware and sending it to an executive, who thinks the email is legitimate and opens it, activating the malware. What is the hacker's goal?
The hacker's goal is to infiltrate the system by making their victims see reasons or believe that they will help them to handle or resolve their specific problems.
What is a spear phishing attack?“Spear phishing” is known to be a form of phishing goal that is said to often targets a particular person or group and it is one that do include information that is well known to be of interest to the target.
Note that the hacker's goal is to infiltrate the system by making their victims see reasons or believe that they will help them to handle or resolve their specific problems.
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For the IPv4 CIDR address 153.10.22.56 /22 What is the... Netmask: [ Select ] Network Address: [ Select ] Host Mask: [ Select ] Broadcast Address: [ Select ] Number of possible hosts: [ Select ] Host Number: [ Select ]
Netmask:
The netmask is calculated by putting the number of 1’s equal to the given mask value (here 22).
Netmask = 11111111.11111111.11111100.00000000
= 255.255.252.0
Therefore, the netmask is equal to 255.255.252.0
Network Address:
The network address is obtained by performing the AND operation of the bits in the given IP address with the bits of the netmask.
IP address (153.10.22.56) = 10011001.00001010.00010110.00111000
Netmask (255.255.252.0) = 11111111.11111111.11111100.00000000
Network address = 10011001.00001010.00010100.00000000
= 153.10.20.0
Therefore, the network address is equal to 153.10.20.0
Host Mask:
The remaining or the unused bits in the netmask are used as the host mask. In other words, the host mask is obtained by complementing each bit of the netmask.
Netmask = 11111111.11111111.11111100.00000000
Host mask = 00000000.00000000.00000011.11111111
= 0.0.3.255
Therefore, the host mask is equal to 0.0.3.255
Broadcast address:
The broadcast address is used to send the packages to all the hosts in the network. It is obtained by setting all the bits after the network address to 1.
Network address (153.10.20.0) = 10011001.00001010.00010100.00000000
Broad cast address = 10011001.00001010.00010111.11111111
= 153.10.23.255
Therefore, the broadcast address is equal to 153.10.23.255
The number of possible hosts:
The number of possible hosts is computed as follows:
Possible hosts = 2n, where n is the number of host bits.
Out of the above 2n hosts, 2 are reserved and hence the number of usable hosts is equal to 2n – 2.
Number of hosts = 210 – 2 = 1024 – 2 = 1022
Host number:
Host number is the decimal equivalent of the host bits in the IP address.
Ip address (153.10.22.56) = 10011001.00001010.00010110.00111000
Host bits = 10.00111000
Host number = 29 + 0 + 0 + 0 + 25 + 24 + 23 + 0 + 0 + 0
= 512 + 32 +16 + 8
= 568
Hence, the host number is equal to 568.
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A piece of rigging hardware used to couple the end of a wire rope to eye fittings, hooks, or other connections is a(n)?
A piece of rigging hardware used to couple the end of a wire rope to eye fittings, hooks, or other connections is a(n) hitch.
What is Hardware?This is referred to as the physical components of a computer or electronic system and can be seen or felt and examples include keyboard, mouse etc.
The hitch is a rigging hardware which consists of a shank and ball platform used for various types of function such as coupling the end of a wire rope to eye fittings , towing etc. This therefore ensures they are well attached and less likely to remove or fall off thereby makes it the most appropriate choice.
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When we determine the age of the universe using the Hubble Time, what important simplifying assumption goes into our calculations
The factor that is important in simplifying assumption that goes into our calculations is:
Option a. that the expansion of the universe has been happening at the same rate - neither speeding up or slowing down.What is Hubble time?The Hubble time is known to be a form of an estimate that is given to the age of the universe and it is one that is often based on the Hubble constant.
Note therefore, The factor that is important in simplifying assumption that goes into our calculations is:
Option a. that the expansion of the universe has been happening at the same rate - neither speeding up or slowing down.See full question below
When we determine the age of the universe using the Hubble Time (1/H0), what important simplifying assumption goes into our calculations?
a. that the expansion of the universe has been happening at the same rate - neither speeding up or slowing down
b. that all the galaxies are moving away from us at exactly the same speed, no matter how far away they are
c. that the cosmological principle doesn't hold: the universe is not isotropic and homogeneous
d. that we have accounted correctly for the effects of dark energy e. that the universe is actually contracting instead of expanding
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(a). suppose you are going to transmit a packet over osi network model. explain the working of router, gateway and switch. which device will be used if you face an issue of weak signals during transmission? also, mention on which level of osi model these devices will work efficiently. (b). attenuation, distortion and noise are the causes of transmission impairment. what would be the solution or how these causes can be improved.
Answer:
Step 1:
OSI stands for Open Systems Interconnection.
OSI model was developed by the International Organization for Standardization(ISO). It is a reference model for how applications communicate over a network. The OSI model characterizes computing functions into a universal set of rules and requirements in order to support interoperability between different products and software.
The OSI model can be considered as a universal language for computer networking. It is based on the concept of divide and conquers, it splits up the communication system into 7 abstract layers, and the layer is stacked upon the previous layer.
Layers of OSI Model:
OSI model has seven layers which are as follows:
The Physical LayerThe Data Link LayerThe Network LayerThe Transport LayerThe Session LayerThe Presentation LayerThe Application LayerStep 2
Routers – A router is a device like a switch that routes data packets based on their IP addresses. Router is mainly a Network Layer device. Routers normally connect LANs and WANs together and have a dynamically updating routing table based on which they make decisions on routing the data packets. Router divide broadcast domains of hosts connected through it.
Gateway – A gateway, as the name suggests, is a passage to connect two networks together that may work upon different networking models. They basically work as the messenger agents that take data from one system, interpret it, and transfer it to another system. Gateways are also called protocol converters and can operate at any network layer. Gateways are generally more complex than switch or router.
Switch – A switch is a multiport bridge with a buffer and a design that can boost its efficiency(a large number of ports imply less traffic) and performance. A switch is a data link layer device. The switch can perform error checking before forwarding data, that makes it very efficient as it does not forward packets that have errors and forward good packets selectively to correct port only. In other words, switch divides collision domain of hosts, but broadcast domain remains same.
Which device will be used if you face an issue of weak signals during transmission.
Router device will be useful mostly for issue of weak signals during transmissin.
Mention on which level of OSI model these devices will work efficiently.
All these three devices router, gateway and switch work efficiently at hardware layers such as physical layer, datalink layer and network layer.
Step 3
Transmission impairment:
In the data communication system, analog and digital signals go through the transmission medium. Transmission media are not ideal. There are some imperfections in transmission mediums. So, the signals sent through the transmission medium are also not perfect. This imperfection cause signal impairment.
It means that signals that are transmitted at the beginning of the medium are not the same as the signals that are received at the end of the medium that is what is sent is not what is received. These impairments tend to deteriorate the quality of analog and digital signals.
There are three main causes of impairment are,
Attenuation
Distortion
Noise
1.Attenuation:
Here attenuation Means loss of energy that is the weaker signal. Whenever a signal transmitted through a medium it loses its energy, so that it can overcome by the resistance of the medium.
That is why a wire carrying electrical signals gets warm, if not hot, after a while. Some of the electrical energy is converted to heat in the signal.
Amplifiers are used to amplify the signals to compensate for this loss.
2.Distortion:
If a signal changes its form or shape, it is referred to as distortion. Signals made up of different frequencies are composite signals. Distortion occurs in these composite signals.
Each component of frequency has its propagation speed traveling through a medium and therefore, different components have different delay in arriving at the final destination.
It means that signals have different phases at the receiver than they did at the source.
3. Noise:
Noise is another problem. There are some random or unwanted signals mix up with the original signal is called noise. Noises can corrupt the signals in many ways along with the distortion introduced by the transmission media.
Noise may be divided into four categories:
Thermal noiseIntermediation noiseCrosstalkImpulse noiseWhy are digital computers more popular these days?
Answer:
The small size of the transistor, its greater reliability, and its relatively low power consumption made it vastly superior to the tube.
Question 3 options: Abstractions in a BNF description that can have two or more distinct definitions, representing two or more possible syntactic forms in the language.
Abstractions in a BNF description that can have two or more distinct definitions, representing two or more possible syntactic forms in the language and this is known to be Nonterminal symbols.
What are these symbols about?Nonterminal symbols are known to be a kind of symbols that one can be able to replaced.
Note that they are often called simply syntactic variables and as such, Abstractions in a BNF description that can have two or more distinct definitions, representing two or more possible syntactic forms in the language and this is known to be Nonterminal symbols.
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A web developer requires an environment to perform application testing. Which cloud service type does the developer choose to use
The cloud service type that the developer choose to use is known to be PaaS.
What is PaaS?Platform as a service (PaaS) is known to be a full development and deployment environment that is seen in the cloud, and it is made up of resources that helps users to deliver a lot of things from simple cloud-based apps to strong, cloud-enabled firm's applications.
Hence, in the case above, The cloud service type that the developer choose to use is known to be PaaS.
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Javascript is an object-based programming language that involves working with the properties and methods associated with objects.
a) True
b) False
Answer:
True
Explanation:
You can set variables and make method functions.
An object with a density of 871.0 kg/m3 and a mass of 1255.0 kg is thrown into the ocean. Find the volume that sticks out of the water.
The object can only stick out of the water because of the Archimede's principle.
What is the Archimede's principle?Archimedes' principle states that the buoyant force acts vertically and upwards on bodies totally or partially immersed in fluids, moreover, according to this principle, such force has the same value as the weight of the fluid, displaced by the insertion of the body.
With that being said, following the Archimede's principle:
Weight of water displaced by floating object = Weight of object; so
Volume of water displaced = Part below water line; changing values and using the pseawater = [tex]1024kg/m^{3}[/tex]:
[tex]\frac{m}{\rho} \\\\\frac{1255}{1024} = 1,2255859375m^{3}[/tex]
Volume of entire object = [tex]\frac{m}{\rho}[/tex]
[tex]\frac{1255}{871} = 1,4408725603m^{3}[/tex]
Volume that sticks out of the water: Volume of entire object - Volume of water displaced; so: 1,4408725603 - 1,2255859375 = 0,2152866228m3
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The cell tower’s base transmission station is connected to a mobile ____ station.
The cell tower’s base transmission station is connected to a mobile switching station.
What is a switching station?A switching station is known to be a kind of a substation that is known to be without transformers and it is one that often operate only based or at a single voltage level.
Note that Switching stations are known to be often used as collector and they also acts as a distribution stations.
Hence, The cell tower’s base transmission station is connected to a mobile switching station.
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Canvas allows instructors to utilize powerful edtech apps to create dynamic learning environments for their students. In canvas, apps are identified as.
In canvas, apps are identified as:
LTIs External ToolsWhat are Canvas External Tools?An External Tool is one that helps Canvas users along with the use of LTI learning resources and activities gotten from other websites and academic technologies.
Note that Canvas is known to have a unique features that are said to be available so that one can link to courses such as external tools.
Hence, In canvas, apps are identified as:
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In cell H5, create a formula to divide the value in cell F5 by cell F12 using relative cell references.
The Excel formula to enter in cell H5 using the relative style of cell referencing is = F5/F12
What are Excel formulas?Excel formulas are expressions or equations used alongside Excel functions to perform arithmetic and logical formulas for computation.
How to create the Excel formula to enter in cell H5?From the question, we understand that we are to make use of the relative style of referencing
This means that we make use of the cell name as it is, without adding the "$" sign, as it is in absolute style of cell referencing and mixed style of cell referencing
So, we make use of cell F5 as F5 and we make use of cell F12 as F12
The value in cell F5 divided by cell F12 using relative cell references is represented as:
F5 divided by F12
Rewrite the above formula as follows:
F5/F12
Excel formulas begin with the "=' sign
So, the above formula becomes
= F5/F12
Hence, the Excel formula to enter in cell H5 using the relative style of cell referencing is = F5/F12
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Write the removeevens() method, which receives an array of integers as a parameter and returns a new array of integers containing only the odd numbers from the original array. the main program outputs values of the returned array.
hint: if the original array has even numbers, then the new array will be smaller in length than the original array and should have no blank element.
ex: if the array passed to the removeevens() method is [1, 2, 3, 4, 5, 6, 7, 8, 9], then the method returns and the program output is:
[1, 3, 5, 7, 9]
ex: if the array passed to the removeevens() method is [1, 9, 3], then the method returns and the program output is:
[1, 9, 3]
lab: remove all even numbers from an array
labprogram.java l.
1 import java.util.arrays;
2
3 public class labprogram {
4
5 public static int[] removeevens(int [] nums) {
6
7
8 }
9
10 public static void main(string[] args) {
11
12 int [] input {1,2,3,4,5,6,7,8,9};
13 int [] result = removeevens(input);
14
15 // helper method arrays.tostring() converts int[] to a string
16 system.out.println(arrays.tostring(result)); // should print [1, 3, 5, 7, 9]
17 }
18 }
Answer:
import java.util.*;
import java.util.Arrays;
public class LabProgram
{
// called function
public static int[] removeEvens(int [] nums)
{
// calculates the length of array
int len = nums.length;
int j=0;
// loop to keep count how many odd are there in array
for(int i=0;i<len;i++)
{
// condition for odd
if(nums[i]%2!=0)
{
// keeps count of odd
j++;
}
}
// declaration of array for odd nums
int newarray[] = new int[j];
j = 0;
// loop
for(int i=0;i<len;i++)
{
// condition for odd
if(nums[i]%2!=0)
{
// assigning odd number to new array
newarray[j] = nums[i];
// increment of j
j++;
}
}
// returning new array
return newarray;
}
// main program
public static void main(String[] args)
{
// array declaration
int [] input = {1,2,3,4,5,6,7,8,9};
// calling a function, passing the paramtere
int [] result = removeEvens(input);
//
System.out.println(Arrays.toString(result));
}
}
Explanation:
To generate a control break report, your input records must be organized in ____ order based on the field that will cause the breaks.
To generate a control break report, your input records must be organized in directory order based on the field that will cause the breaks.
What is directory?Directory serves as guide in locating a particular item.
The directory is written in a way for an individual or an employee to understand and be able to retrieved needed information.
Therefore, to generate a control break report, your input records must be organized in directory order based on the field that will cause the breaks.
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If you try to add a new item to a full stack the resulting condition is called a(n)?
Answer:
it's called an overflow
Write a while loop that adds 5 to userNum while userNum is less than 20, displaying the result after each addition. Ex: For userNum
Using the computational knowledge in JAVA it is possible to write a code that Write a while loop that adds 5 to userNum while userNum
Writting the code in JAVA:// declaring variable userNum
var userNum = 5;
// variable ans to store all answers and print them in single line
// (as expected in sample output)
var ans = "";
// while loop, while userNum is <= 20
// (to get output 25 on screen, we need to run loop till less-than-equal)
while(userNum <= 20) {
userNum += 5;
ans += userNum + " ";
}
// displaying final output on console
console.log(ans);
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A touch screen _____.
A touch screen is known to be a kind of a display device that gives room for its users to be able to interact with a computer through the use of their finger or stylus.
What is a Touch Screen?Touch screen are regarded as output device as a person can be able to touch and use screen that displays the content in their mobile.
Hence, A touch screen is known to be a kind of a display device that gives room for its users to be able to interact with a computer through the use of their finger or stylus.
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The _________________ can be used to repair common causes of unbootable operating systems. It is based on the Windows Preinstallation Environment (Windows PE).
The Windows Recovery Environment (Windows RE or WinRE) can be used to repair common causes of unbootable operating systems. It is based on the Windows Preinstallation Environment (Windows PE).
What can be used to repair common causes of unbootable operating system?The use of the Windows Recovery Environment (WinRE) is known to be a kind of tools that is often used in the recovery environment that is said to often helps in the repair of the common issues of unbootable operating systems.
Hence, The Windows Recovery Environment (Windows RE or WinRE) can be used to repair common causes of unbootable operating systems. It is based on the Windows Preinstallation Environment (Windows PE).
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Write the first line of a function named Days. The function should return an integer value. It should have three integer parameters: intYears, intMonths, and intWeeks. All arguments should be passed by value.
Answer:
Program:
Module Module1
Function Days(intYears As Integer, intMonths As Integer, intWeeks As Integer) As Integer
' 1 year = 365days
' 1 month=30.417 days
' 1 week = 7 days
Days = 365 * intYears + 30.417 * intMonths + 7 * intWeeks
End Function
Sub Main()
Dim years, months, weeks As Integer
Console.Write("Enter the number of years: ")
years = Convert.ToInt32(Console.ReadLine())
Console.Write("Enter the number of months: ")
months = Convert.ToInt32(Console.ReadLine())
Console.Write("Enter the number of weeks: ")
weeks = Convert.ToInt32(Console.ReadLine())
Console.WriteLine("Days: " & Days(years, months, weeks))
Console.ReadKey()
End Sub
End Module
A _______ engine is a specialized program that assists you in locating information on the web and the internet.
Answer:
search
Explanation:
A search engine is a type of software that is used to carry out web searches. It works by "crawling" through the World Wide Web one web page at a time and indexing the pages.
If an algorithm created to help make hiring decisions is based on previous unfair decisions, then the algorithm may be
If an algorithm created to help make hiring decisions is based on previous unfair decisions, then the algorithm may be flawed.
What are algorithms being used for?Algorithms are known to be tools that are made to help in calculation, data processing, and a kind of automated reasoning.
Hence, If an algorithm created to help make hiring decisions is based on previous unfair decisions, then the algorithm may be flawed.
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Answer:
biased
Explanation:
2023 murano’s available intelligent awd adjusts the ________ to help maintain cornering control.
2023 Murano's available intelligent awd adjusts the Torque delivered to the wheels to help maintain cornering control.
How does torque moves wheels?The torque from the engine is known to be that tool that moves a car. A lot of torque can be transferred to the wheels in first gear and it is better than in fifth gear.
Hence, 2023 Murano's available intelligent awd adjusts the Torque delivered to the wheels to help maintain cornering control.
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Your team at amazon is overseeing the design of a new high-efficiency data center at hq2. a power grid need to be generated for supplying power to n servers. all servers in the grid have to be connected such that they have access to power. the cost of connections between different servers varies. assume that there are no ties, names of servers are unique, connections are directionless, there is at most one connection between a pair of servers, all costs are greater than zero, and a server does not connect to itself. write an algorithm to minimize the cost of connecting all servers in the power grid. input two arguments - num, an integer representing number of connections. connectons, representing a list of connections where each element of the list consists of two servers and the cost of connection between the servers. note: the cost of connection between the servers is always greater than 0.
example input num = 5 connection = [[a,b,1], [b,c,4], [b,d,6], [d,e,5], [c,e,1]]
output [[a,b,1], [b,c,4], [c,e,1], [d,e,5]]
Answer:
void print2(int row) {
for (int i = 0; i < row; i++) {
char ch = 'a';
char print = ch;
for (int j = 0; j <= i; j++) {
cout << print++;
}
cout << endl;
}
}
int count_digits(int num) {
int count = 0;
int temp = num;
while (temp != 0) {
temp = temp / 10;
count++;
}
return (num % count);
}
Explanation:
The nurse assesses the heart sounds of a 77-year-old client with chronic heart failure. Which heart sound should the nurse document
If the nurse assesses the heart sounds of a 77-year-old client is one that has chronic heart failure, the heart sound that the nurse document is known as S3 extra heart sound.
What does an extra S3 heart sound mean?The term Third Heart Sound S3 is known to be the outcome or the result obtained from increased atrial pressure that brought about an increased flow rates, and this is one that is often seen in congestive heart failure.
Note that it is one that is said to be the most common cause of a S3 and it is links dilated cardiomyopathy with that of dilated ventricles and it is one that also adds to the sound.
Hence, If the nurse assesses the heart sounds of a 77-year-old client is one that has chronic heart failure, the heart sound that the nurse document is known as S3 extra heart sound.
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You wish to use your personal laptop computer at work, but the it department folks will not allow this. the likely reason is that ______.
Answer: Your non-work related use of a laptop could increase vulnerability.
Explanation: Vulnerability is one of the most important and stressed out section in IT, so it's best to decrease that possibility whenever!
I hope this helps!
The command-line interface tells a user that it's ready to receive commands by displaying a specific set of characters called a(n) _____
Answer:
it's called the prompt, mean yeah
Many programmers think object-oriented programming is a superior approach to procedural programming. Others think it adds a level of complexity that is not needed in many scenarios. Find and summarize arguments on both sides. With which side do you agree
I agree with the programmers who think object-oriented programming is a superior approach to procedural programming.
Why is OOP better than procedural programming?In terms of Security, Object-oriented programming is said to have more of a secure based than procedural programming, due to the level of abstraction or that is due to data hiding property.
Note that It hinders the access of data to any member functions of the same class and one cannot see a thing like that such as data hiding in the procedural programming framework.
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When using sftp to share files, what is encrypted in addition to the authentification information?.
In using SFTP to share files, the encryption in addition to the authentication information is seen in the user's email address.
What is authentication information?Authentication Information is known to be that which tells about the usernames, passwords, electronic certificates, etc., that a one can use to know or be assured of a User's true identity.
Note that In using SFTP to share files, the encryption in addition to the authentication information is seen in the user's email address.
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Which data protection process provides prebuilt capabilities, mapped to specific regulations, to create the necessary resources to implement and demonstrate compliance with these regulations
The data protection process that provides prebuilt capabilities, mapped to specific regulations, to create the necessary resources to implement and demonstrate compliance with these regulations is known as The European Union General Data Protection Regulation (GDPR).
Who are held responsible for your compliance with data protection laws and processes?Employers are known to be people who must be held accountable for data processing works while also working and complying with data protection principles.
The General Data Protection Regulation (GDPR) is known to be one of the hardest privacy and security law in the globe as it is known to be a body that imposes obligations onto its firm anywhere.
Hence, The data protection process that provides prebuilt capabilities, mapped to specific regulations, to create the necessary resources to implement and demonstrate compliance with these regulations is known as The European Union General Data Protection Regulation (GDPR).
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