A group of computers that share resources on or provided by network nodes is referred to as a computer network.
What is computer network ? In order to communicate with one another, the computers use standard communication protocols through digital networks. These linkages are made up of telecommunication network technologies, based on physically wired, optical, and wireless radio-frequency means that may be organized in a number of computer network. Among the nodes of a computer network are laptops, servers, networking equipment, and other specialized or general-purpose hosts. In addition to having hostnames, they are recognized by network addresses. Hostnames act as distinctive designations for the nodes and are hardly ever modified after first assignment. For communication protocols like the Internet Protocol to locate and identify the nodes, network addresses are used.Computer networks can be categorized using a variety of factors, such as the signal-transmission medium, bandwidth, communications protocols used to manage network traffic, network size, topology, traffic-control mechanism, and organizational goals.Internet connectivity, digital video and audio, the shared use of application and storage servers, printers, fax machines, and email and instant messaging software are just a few of the many applications and services supported by computer networks.To Learn more About computer network refer to:
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Why do people rarely use cash now?
Answer:
Cash doesn't have fees
Explanation:
as mentioned, customers paying by card spend significantly more than cash customers. Adding card payments will increase revenue which will more than offset the costs of any fees
what is the context switch time, associated with swapping, if a disk drive with a transfer rate of 2 mb/s is used to swap out part of a program that is 200 kb in size? assume that no seeks are necessary and that the average latency is 15 ms. the time should reflect only the amount of time necessary to swap out the process.
A context switch is the time it takes to move from one process to another, from one that is now running to one that is waiting for instructions. When you multitask, this happens.
What context switch time, associated with swapping?When the CPU is transferred from one process to another that is in an advanced stage of readiness to run, the kernel swaps contexts, which results in a context switch. When a whole process is transferred to the disk, swapping occurs. To find out if a process is in pause mode, perform a context switch.
The context switch time equals T – (SUM of all processes (waiting time + execution time)) if the sum of all processes' execution times equated T.
Therefore, 200 KB / 2048 KB per second + 15 ms = 113 ms.
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If the last line in a file is not terminated with \n, the readline method will return the line without \n.
a. True
b. False
True, the readline function will return the line without a \n if the last line of a file doesn't end with one.
Linux comes with a built-in text editing tool called Sed. "Stream editor" is what the name "sed" means. Despite its name, sed isn't a standalone text editor. Instead, it accepts text as input, modifies it in different ways as directed, and then outputs the result.
Sed's entire name provides us a clue as to how it operates. The text input is treated as a "stream" by Sed. Anywhere, including a text file or standard output, can provide the text (STDOUT). Sed processes the input line by line after taking it.
We'll use the sed "d" command to remove a line. Keep in mind that you must specify which line to remove. If not, sed will remove every line.
Sed may remove a selection of lines.
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how do you make a short secret, such as a password, become long enough for use? salting key elongation ephemeral operations key stretching
We can extend the length of a short secret, like a password, by employing a method called (D) key stretching.
What is key stretching?In order to make it more difficult for a brute-force assault, the idea behind key stretching is to add a random string of characters to the password hash: BCRYPT:
Key stretching techniques are used in cryptography to increase the resources (time and sometimes space) required to test each potential key, hence boosting the security of a key that may be weak, usually a password or passphrase, against a brute-force assault.
Human-generated passwords or passphrases are frequently brief or predictable enough to be cracked, but key stretching aims to thwart such assaults by making the straightforward process of trying one password candidate more challenging.
In some real-world applications where the key length has been limited, key stretching enhances security by simulating a greater key length from the viewpoint of a brute-force attacker.
Therefore, we can extend the length of a short secret, like a password, by employing a method called (D) key stretching.
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Correct question:
How do you make a short secret, such as a password, become long enough for use?
(A) salting key
(B) elongation
(C) ephemeral operations
(D) key stretching
Advances in information processing and communication have paralleled each other.
a. True
b. False
Advances in information processing and communication have paralleled each other is True.
collection, recording, organising, retrieval, distribution, display, and information processing. The phrase has been used frequently recently to refer especially to computer-based procedures.
The word "information" is used to describe the facts and opinions that people give and receive in the course of their daily lives. People can learn information directly from other living things, from the media, from electronic data banks, and from a variety of observable phenomena in their environment. Using these facts and views leads to the creation of further knowledge, some of which is shared with others via conversation, through instructions, in letters and other written communication, and through other media. A body of knowledge is defined as information arranged according to certain logical relationships and is anything that may be learned via systematic exposure or study.
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An office building has two floors. A computer program is used to control an elevator that travels between the two floors. Physical sensors are used to set the following Boolean variables.
The elevator moves when the door is closed and the elevator is called to the floor that it is not currently on.
Which of the following Boolean expressions can be used in a selection statement to cause the elevator to move?
answer choices
(onFloor1 AND callTo2) AND (onFloor2 AND callTo1)
(onFloor1 AND callTo2) OR (onFloor2 AND callTo1)
(onFloor1 OR callTo2) AND (onFloor2 OR callTo1)
(onFloor1 OR callTo2) OR (onFloor2 OR callTo1)
The following Boolean expressions, "onFloor1 AND callTo2" or "onFloor2 AND callTo1," can be used in a selection statement to move the elevator.
The commands to move the lift may be simply determined based on the other commands designed to be provided and received by the lift, which indicate what operation it is engaged in.
When the elevator is on the first floor and has to be taken to the second floor, the order "onFloor1 AND callTo2" can be used. The order "onFloor2 AND callTo1" would serve as the reverse of the previously given instruction and cause the lift to operate in the exact opposite manner.
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A student is writing a program to model different real-world events using simulations. Which of the following simulations will generate a result that would best be stored using a Boolean variable?
answer choices
A simulation of flipping a fair coin.
A simulation of rolling a fair die (with sides numbered 1 through 6.)
A simulation of the temperature in a location over time.
A simulation of traffic patterns on a road.
The simulations will generate a result that would best be stored using a Boolean variable is a simulation of flipping a fair coin.
What is boolean?Boolean is a common datatype in many of programming language. The boolean only have two value which is true and false. Since, the boolean only have two value which it means the simulation that using boolean variable must have maximum two value.
The rolling die, the temperature, and the traffic patterns is have more than two value, so it can't stored in boolean variable. The flipping coin only have two value which is head or tail, so it can be stored in boolean variable.
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1. Payroll Program with Input Validation Design a payroll program that prompts the user to enter an employee's hourly pay rate and the number of hours worked. Validate the user's input so that only pay rates in the range of $7.50 through $18.25 and hours in the range of 0 through 40 are accepted. The program should display the employee's gross pay.
The payroll program that prompts the user to enter an employee's hourly pay rate and the number of hours worked is made with the help of Do While loop.
What is Program?A sequence or set of instructions written in a programming language for a computer to follow is called a computer program. Software includes documentation and other intangible components in addition to computer programs. Source code is the human-readable version of a computer program. Because computers can only execute their own native machine instructions, source code must be executed by another computer program.
Given to make a payroll program,
Program is made with Do While loop,
A condition and a process symbol make up the do while construct. First, the block's code is executed. After that, the situation is looked at. The block's code is executed once more if the condition is met. This continues until the condition is true.
The program code is,
Do While payRate > 7.5 AND payRate < 18.25
Display "Enter hourly pay rate: "
Input payRate
End While
Do While hoursWorked > 0 AND hoursWorked < 40
Display "Enter number of hours worked: "
Input hoursWorked
End While
grossPay = payRate * hoursWorked
Display "The employee gross pay is " + grossPay
Hence code is as follows.
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With saas, firms get the most basic offerings but can also do the most customization, putting their own tools (operating systems, databases, programming languages) on top.
a. True
b. False
False: With SaaS, businesses receive the most basic services but also have the most customizable options, allowing them to prioritise their own tools (operating systems, databases, and programming languages).
A method of distributing programmes via the Internet as a service is known as software as a service (or SaaS). You may avoid complicated software and hardware maintenance by just accessing software via the Internet rather than installing and maintaining it.
SaaS applications are sometimes referred to as hosted software, web-based software, and on-demand software. Whatever name they go by, SaaS apps run on the servers of a SaaS provider. Security, availability, and performance of access to the application are all managed by the supplier.
A suitable analogy for the SaaS model is a bank, which preserves each customer's privacy while offering a service that is dependable and secure—on a large scale. Customers of a bank utilise the same financial processes and technology without being concerned about unauthorised access to their personal data.
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When should a hardware device be replaced in order to minimize downtime?
A hardware device should be changed as soon as its MTBF is achieved to reduce downtime.
Quite often, hardware devices work on data structures in main memory without involving the system's primary CPU. Descriptors, structures specifying a list of tasks for a device to perform, and data network packets that are processed (or stored in memory) by devices are examples of typical situations. DML contains a memory layout data type to facilitate the modelling of such devices. Memory layouts are used as types for variables and resemble structure types in C. DML layouts unambiguously map to the data layout in memory, as contrast to C structs, where the compiler may include padding between fields to guarantee that the data is aligned correctly.
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an error occurred within the server preventing it from fulfilling the request. how to solve the following notification?
Answer:
Explanation:
There are several steps you can take to try to solve the error message you are seeing:
-Check the server logs: These may provide more information about the error, such as the specific component or process that caused the problem.
-Restart the server: Sometimes, simply restarting the server can resolve the issue.
-Check for updates: If the error is caused by a bug or other issue in the software running on the server, installing updates or patches may fix the problem.
-Check for hardware issues: If the error message mentions hardware, there may be a problem with the server's hardware. In this case, you may need to replace a faulty component or seek the help of a hardware technician.
-Consult with your technical support team: If you are unable to resolve the issue on your own, your technical support team may be able to help. They can provide more detailed information about the error and may be able to offer specific solutions for fixing it.
Keep in mind that the specific steps needed to resolve the error will depend on the cause of the problem and the environment in which the server is running.
How do cell phones negatively affect students in the classroom?
Cell phones negatively affect students with a divert attention and have a detrimental effect on cognitive ability, reaction times, performance, and enjoyment of focused tasks.
What is cognitive ability?Any task, no matter how simple or difficult, requires cognitive abilities, which are brain-based skills. They are less concerned with actual knowledge and more with the processes by which we learn, remember, solve problems, and pay attention.
For instance, picking up the phone requires motor skills (lifting the receiver), language skills (talking and understanding language), perception (hearing the ring tone), decision-making (answering or not), and social skills.
Particular neuronal networks provide support for cognitive abilities or skills. For instance, the temporal lobes and some parts of the frontal lobes are primarily responsible for memory functions. Due to damaged neuronal regions and networks, people with traumatic brain injuries may have lower cognitive function.
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give an example show how a letter in the english alphabet is stored using ASCII
The letters in the English alphabet are stored using ASCII by the binary codes. The letter 'a' has the binary number 0110 0001.
What is ASCII?American Standard Code for Information Interchange, or simply ASCII, is a common data-encoding system for electronic computer communication.
Letters, numbers, punctuation marks, and other computer characters are given conventional numeric values by ASCII. The following are possible representations for ASCII characters: as three-digit octal (base 8) numbers.
Therefore, binary codes are used to store the English alphabet's letters using ASCII. The binary value of the letter "a" is 0110 00.
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Which type of attack can be conducted to render a network device inaccessible?
A network device can become unreachable through attacks such as Ransomware and Denial of Service.
Malware called ransomware blocks a user's or an organization's access to files on a computer. Cyberattackers make it so that paying the ransom is the quickest and least expensive option to get back access to an organization's files by encrypting these files and asking for a ransom payment for the decryption key. To provide ransomware victims more motivation to pay the ransom, several variants have included further functionality, like data stealing.
The most noticeable and well-known malware family is now ransomware. Recent ransomware attacks have disrupted public services in cities, adversely affected hospitals' capacity to deliver essential services, and seriously hurt a number of different enterprises.
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the amount of space you will allow from the edge of the doorframe to the inside edge of the casing is called what
Door frame manufacturers then add standard spacing to these dimensions to arrive at what is called the reveal size. The reveal size is the actual opening in the frame that the door fits into. So for a 2040 x 920 mm door, the standard reveal size is 2055 x 924 mm.
What is the bottom of a door frame called?
The door threshold is at the bottom of the frame and rests flat on the floor.
What do you call the piece of metal behind the door?
A door sweep is a long piece of metal that holds a gasket made of materials such as neoprene, silicone, or nylon brush. This long piece of metal is the surface attached to the bottom of the door.
Please tell me how to replace the lower sill panel.
Remove the old door sill under the door frame. Place the old door sill over the new sill and draw around it. Cut the new door sill trim and chamfer the outside edges. Install the new door sill under the door frame.
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Which of the following is the correct way to create an alert box with the message “That’s not quite correct.”?
A.
function displayAlert(){ display Alert("That’s not quite correct"); }
B.
function displayAlert(){ alert("That’s not quite correct"); }
C.
function displayalert(){ ("That’s not quite correct"); }
D.
function displayalert(){ alert("That’s not quite correct"); }
Answer:
i think the answer is d
Explanation:
looks cool
Decrypt a message that was encrypted using the following logic: • First the words in the sentence are reversed. For example, "welcome to hackerrank" becomes "hackerrank to welcome". • For each word, adjacent repeated letters are compressed in the format
To decrypt a message that was encrypted using the logic you described, you can use the following steps:
Reverse the order of the words in the message: This will restore the original word order of the sentence.
For each word, find any compressed letters and expand them: For example, if a word contains the letter pair "aa", you can replace it with "a".
Concatenate the words to form the original message: This will give you the decrypted message.
Here is an example of how you can use these steps to decrypt a message:
Message: "kcabtoohsrewolfnwodgnikooL"
Step 1: "kcabtoohsrewolfnwodgnikooL" becomes "Look good going down now wolf welcome short so hot back"
Step 2: "Look good going down now wolf welcome short so hot back" becomes "Look good going down now wolf welcome short so hot back"
Step 3: Concatenate the words to form the original message: "Look good going down now wolf welcome short so hot back"
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you need to enable fast, easy, and secure transfers of files over long distances on s3. which service would you use?
With Amazon S3 Transfer Acceleration, files may be transferred quickly, easily, and securely between your client and your Amazon S3 bucket over long distances. The widely dispersed AWS Edge Locations of Amazon CloudFront are used by S3 Transfer Acceleration.
What AWS feature allows for quick, simple, and secure file transfers across vast distances?
Fast, simple, secure file transfers across long distances between your client and an S3 bucket are made possible by the bucket-level technology known as Amazon S3 Transfer Acceleration.
To increase the pace of international transfers into S3 buckets, Transfer Acceleration was created.
How can S3 transfer acceleration speed up the process of transferring data into S3?
S3 Transfer Acceleration (S3TA) conceptually minimizes the distance to S3 for remote applications by lowering the variability in Internet routing, congestion, and speeds that can effect transfers.
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Why are client/server networks usually installed in businesses?
A. Client/server networks are cheaper to install.
B. Security is weaker on client/server networks
C. They do not require dedicated servers like P2P networks.
D. They are more scalable than P2P networks.
The central administration of applications and data is a significant benefit of the client-server network. A client-server network speeds up data transfer while also securing the data sent.
Using the network is a wise choice for organizations seeking faster and more secure data transport. Because the files are centralized, it is easier to perform consistent file backups. File duplication is no longer a concern, and the security issues associated with peer-to-peer networks are eliminated because everyone on the network just needs access to the central server. When establishing a P2P network, there is no need to purchase a separate computer to function as a server. It does not necessitate the use of a network operating system or a full-time system administrator. Adaptability: The P2P network is easily expanded to incorporate additional customers.
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Please help!
Okay, so this may be more of a personal problem, than school related, since I am finished with my school work, but I need this!
I own a SanDisk flash drive, and I want to download pictures on it so I can plug into my tv and use them for art references, but when I put the flash drive into my tv, and when I clicked on an image, it say that, "the files are unsupported."
Any idea what that means, and how I can fix it?
Thanks!
If the SanDisk flash drive does not support your file images, the TV would not support the images of the file. Use another device to open images.
What is a flash drive?A USB flash drive can be used to launch an operating system from a bootable USB, store crucial files and data backups, transport preferred settings or programs, perform diagnostics to diagnose computer issues, and more.
The drives are compatible with a wide range of BIOS boot ROMs, Linux, MacOS, and Microsoft Windows.
Therefore, your file's photos would not be supported on the TV if the SanDisk flash drive could not read them. To view photos, switch to another device.
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What is the correct syntax for an input() function that asks the user to input a random number and store it in a variable called random_number?
The Python randint () method is used to produce random numbers. In the random module, this function is defined.
Explain about the random numbers?By watching some unpredictable external input, such as mouse movements or fan noise, then synthezising data from it, computers may produce really random numbers. Entropy is the scientific term for this. Other times, they create "pseudorandom" numbers using an algorithm to make the results seem random even when they aren't.
Random number generation is the technique of generating a series of numbers or symbols that cannot be fairly predicted with a higher degree of certainty than by chance alone.
Creating data encryption keys, simulating and modelling complicated processes, and picking random samples from bigger data sets are just a few of the many uses for random numbers.
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What is the role of the media and why is it important in a democracy?
Political parties now have the means to inform a wide audience about important topics, from policies to elections, through the media. The media can be considered as promoting democracy.
What kind of political tool can social media be utilized for?Because there are so many ideas, thoughts, and opinions floating about on the social media platform, social media is a persuasive communication tool that frequently works to alter or influence beliefs, especially when it comes to political views.Political parties now have the means to inform a wide audience about important topics, from policies to elections, through the media. The media can be considered as promoting democracy; more informed voters would result in a more trustworthy administration.To learn more about Media refer to:
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If you get into trouble with debt you should first
O inform lenders and get debt counseling.
O sell an asset or borrow to pay off the loan.
O let lenders repossess your financed asset.
O refinance the loan.
O file for bankruptcy
A good first step if you get into trouble with debt is to inform your lenders and seek debt "counseling".
What is Bankruptcy?When a business is unable to meet its financial responsibilities or make payments to its creditors, it declares bankruptcy.
If you find yourself in debt, a recommended first step is to notify your creditors and seek debt counseling. This might assist you in understanding your alternatives and determining a solution that works for you.
You could also investigate the following alternatives:
Selling an asset or borrowing money to pay off the loan
Refinancing the loan, if possible
Negotiating with your lenders to try to come up with a repayment plan that works for both of you
Filing for bankruptcy, as a last resort
It is generally not a good idea to let lenders repossess your financed asset without trying to find another solution first. This can have negative consequences for your credit and financial future.
Hence, the correct answer would be an option (A).
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activex is used by developers to create active content. true or false
True, Developers utilize ActiveX to produce interactive content. An executable program that affixes to or infects other executable programs is referred to as a computer virus.
In order to adapt its earlier Component Object Model (COM) and Object Linking and Embedding (OLE) technologies for content downloaded from a network, particularly via the World Wide Web, Microsoft built the deprecated ActiveX software framework. In 1996, Microsoft released ActiveX. Although the majority of ActiveX controls can run on other operating systems besides Windows, in practice this is not the case. Microsoft created a suite of object-oriented programming methods and tools called ActiveX for Internet Explorer in order to simplify the playing of rich media. In essence, Internet Explorer loads other apps in the browser using the ActiveX software architecture.
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Where is the chart tools in Excel?
Then click the arrow next to Chart by first selecting the Insert tab. Double-click the chart you want to add after selecting a chart type. An Excel worksheet with a table of sample data opens when you insert a chart into Word or PowerPoint.
Where is the menu for charting tools?Anywhere in the chart can be clicked. The Design, Layout, and Format tabs are been added to the Chart Tools, which are displayed. Select the chart element you want to format by clicking the arrow adjacent to the Chart Elements box on the Format tab's Current Selection group.
Chart toolbar: what is it?The toolbar for charts serves as a storage area for them. The chart container's width and height are never determined by the program; instead, they are specified by the container itself (as explained in Size of the Chart Container). The toolbar is required.
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What should you do after compiling data for a report?
After gathering information for a report, suggest activities you should do based on the findings.
A data report is a technical document that describes the data you've gathered and demonstrated the analysis process. A data report's structure might be complicated, but it doesn't have to be. You already know how to create a data report if you have had to submit a lab report for high school. An introduction, a body, a conclusion, and an appendix are the typical divisions. To create a polished data report, all you need is a word processor and a spreadsheet tool.
Determine your audience and write the report with them in mind. A data report should be easy to understand for individuals who will just skim the data in search of pertinent details to support the findings.
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What are advantages of lookup fields? check all that apply. Shorter reports simpler queries easier data entry acceptable values fewer misspellings.
Easier data entry, acceptable values, fewer misspellings are advantages of lookup fields.
What is lookup fields?
A field in a table called a "lookup field" is one whose value is obtained from another table or query. The Lookup Wizard should always be used to create a lookup field.
The Lookup Wizard streamlines the procedure and automatically sets the relevant field characteristics and table associations.
What is lookup field how is it used?
Two records can be linked together in a relationship using lookup fields. An account lookup field, for instance, is present in a contact record and links the contact to its account.
Simplest vertical and horizontal lookups can be done using Excel's LOOKUP function. Excel offers LOOKUP in both vector and array formats.
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lance works for a company that allows users to bring their own devices to work. last week lance purchased a software package from a company that allows him to change fonts on pictures that he uses in his work presentations. lance wants to share the program with his coworker susan. which option would be apt for lance's permission to share the application with susan?
The company's software would have to be purchased by Susan.Lance may give Susan access to the software because it is open source.
Is it okay for Lance to give Susan access to the software? Use DRM.It is utilized to safeguard a corporation's digital media against unauthorized use and to guarantee that a company maintains control over the distribution of digital content.By regulating access and limiting it to authorized users, DRM can be used to protect sensitive and secret information.The entertainment sector regularly employs DRM (e.g., audio and video publishers). DRM technologies are utilized by cable and satellite service providers as well as a large number of online retailers, such as Over Drive.Proxy servers, virtual private networks (VPNs), regional restriction or geoblocking, software licenses and keys, user authentication and IP authentication protocols, regional restriction or geoblocking, and designing products to only function on specialized hardware or software are a few examples of these DRM strategies.To learn more about DRM technologies refer
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the data you collect on your point-of-sale system could complement data that your website and app sends to analytics. which feature allows for the collection and sending of events directly to analytics servers?
The data collect on point of syestem could complete data are
What is system?
System is a set of organized components that work together to achieve a specific goal. It can refer to a variety of different concepts, including a computer system, a group of people working together, or a complex network of machines and processes. In each case, the components of a system interact to create an output that is larger than the sum of its individual parts.
Systems are composed of many components, often of different types and from different sources. These components can include hardware, software, people, processes, and data. Systems are designed to be reliable, efficient, and flexible, allowing them to adapt to changing conditions.
The feature that allows for the collection and sending of events directly to analytics servers is called Event Tracking.
With Event Tracking, you can capture data from your point-of-sale system and send it directly to analytics servers, providing a more comprehensive view of your customers' behavior and preferences.
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What is the shortcut key to display a full screen?
Answer:
Fn + F11 or just F11
Explanation:
On a windows PC some keyboards will have a key that say Fn. Fn stands for function. All windows PCs will also have a bar of keys at the top that say F1, F2, F3 all the way upto F12. If you hold down the Fn key and press F11 it will go into full screen. If you don't have an Fn key justpress F11.