Optional chaining is a process for querying and calling properties, methods, and subscripts on an optional that might currently be nil
What does initializer for conditional binding must have optional type?
The following code throws a message which says "Initializer for conditional binding must have Optional type, not 'AnyObject'"
func parseData2(){
var data:NSData?
if let data2 = data {
do {
let details = try NSJSONSerialization.JSONObjectWithData(data2, options: .AllowFragments)
if let actualDetails = details where actualDetails.isKindOfClass(NSDictionary) {
print("Parse Data")
}
}catch {
print("Error \(error)")
}
}
}
To resolve the above error I used the following code.
func parseData2(){
var data:NSData?
if let data2 = data {
do {
let details:AnyObject = try NSJSONSerialization.JSONObjectWithData(data2, options: .AllowFragments)
if let actualDetails:AnyObject = details where actualDetails.isKindOfClass(NSDictionary) {
print("Parse Data")
}
}catch {
print("Error \(error)")
}
}
func parseData2(){
var data:NSData?
if let data2 = data {
do {
let details:AnyObject = try NSJSONSerialization.JSONObjectWithData(data2, options: .AllowFragments)
if let actualDetails:AnyObject = details where actualDetails.isKindOfClass(NSDictionary) {
print("Parse Data")
}
}catch {
print("Error \(error)")
}
}
}
}
func parseData2(){
var data:NSData?
if let data2 = data {
do {
let details:AnyObject = try NSJSONSerialization.JSONObjectWithData(data2, options: .AllowFragments)
if let actualDetails:AnyObject = details where actualDetails.isKindOfClass(NSDictionary) {
print("Parse Data")
}
}catch {
print("Error \(error)")
}
}
}
There is one more code which I want to add considering nil check,type check and then type cast check. The reason behind that Swift offers great flexibility but litle bit difficult to fix issues. Let's say I have a dictionary, cityDetails and I am trying to get data for self.cityZipCode and self.cityIdentifier, which are optional, defined as var cityZipCode:Int? and var cityIdentifier:Int?
if let cityBasic = cityDetails["basicDetails"] where
cityBasic!.isKindOfClass(NSDictionary) {
self.cityZipCode = (cityBasic as! NSDictionary)["zip"].integerValue ?? 0
self.cityIdentifier = (cityBasic as! NSDictionary)["cityId"].integerValue ?? 0
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in each of the code snippets replace the ? character with the correct boolean operator, for instance <,>,
using the appropriate Boolean operator, such as,>,==,not, or not in. Each code block must run properly. Before going on to the next code snippet, run the task associated with the previous one to make sure you passed.
A code snippet is a piece of reuseable code. To maintain track of good code that might be used again in the future, such blocks of code are preserved. Think of a code snippet as a passage from a book that you occasionally wish to store for later (to quote, use the data, etc.). Place the cursor where the snippet should go in the code window, right-click to see the context menu, and choose Insert Snippet, or press CTRL + K, then X. You may then select the required snippet from the Code Snippet Picker that is presented. Press the Esc key to exit the Code Snippet Picker.
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write a java program to accept input from the user and check if the integer number is negative or prositive number.
Program uses the Scanner class to accept input from the user and store in the num variable. Value of num is then checked using if statement, and message is printed indicating whether number is positive or negative.
Here is a simple Java program that accepts input from the user and checks if the entered integer number is negative or positive:
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.print("Enter an integer number: ");
int num = input.nextInt();
if (num >= 0) {
System.out.println(num + "has a positive value.");
} else {
System.out.println(num + " is a negative number.");
}
}
}
The program uses the Scanner class to accept input from the user and store it in the num variable. The value of num is then checked using an if statement, and a message is printed to the console indicating whether the number is positive or negative.
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write a program which will print consecutively letters a-z (both upper and lower case) as you input each of the numbers 1-26?
It is necessary to have a program that, in response to user input, prints the alphabet from A to Z in both upper and lower case.
ASCII values for the alphabet:
Z-90 to A-65, and Z-122 to A-97.
How can lowercase and uppercase letters be printed?Both the lowercase and uppercase alphabets can be printed in one of two ways: either printing values from "A" to "Z" using loops or using ASCII values.
The two methods are put into practice as follows:The ASCII values of the uppercase alphabets range from 65 to 90.
The ASCII values of the lowercase alphabets range from 97 to 122.
As a result, we will use ASCII values ,
Based on the question, if the user enters 4,
B b C c D d would then be the outcome.
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what decimal number corresponds to the binary number 11111111?
The binary representation of 255 is 11111111, which is the same as the decimal number 255.
What does 11111111 in binary translate to in decimal?The binary representation of 255 is 11111111, which is the same as the decimal number 255.By dividing it by 2, which results in 11110000, you can produce the binary number 11111111. For the hexadecimal representation of the number, 4E11, multiply the result by 4.An integer with a decimal form has a whole number and a fractional component. The numerical value for whole plus certain fractional amounts is represented by decimal numbers, which are in between integers.A binary number is a number that is expressed using the binary or base 2-numerical systems, according to digital technology and mathematics.To learn more about decimal number refer to:
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you get a call from a user one day telling you that his password no longer works. as you inquire about the reasons why the password doesn't work, he tells you that yesterday he got a call from an administrator asking for his user account password, which he promptly supplied. you know that a legitimate administrator would have never made this request. you are concerned that the impersonator might have contacted other users with the same request. to protect your network, you would like to reset all user account passwords and force users to change their passwords at next login. you want to accomplish this as quickly as possible. what should you do? (select two. each choice is a possible solution.)
According to the proposed statement, about the incorrect password, the two possible options for the solution are:
Reset all user account passwords and force users to change their passwords at the next login.Contact other users and inform them of the potential security breach, and ask them to check that their passwords have not been compromised.Correct answer: letter A and B.
To further protect your network, you may want to consider implementing multi-factor authentication for all users. This involves requiring the user to provide additional evidence of identity, such as a one-time code sent via SMS or email, or a physical token, in order to log into their account.
Additionally, you should consider implementing a password policy that encourages users to create strong and unique passwords for their accounts and regularly change them.
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Internet sites such as eBay make it easier for sellers and buyers to find one another and, by doing so:a. reduce transaction costs.b. reduce the number of exchanges that occur.c. lower the value created by the goods and services available.d. increase transaction costs.
The correct answer is (a). Internet sites such as eBay make it easier for sellers and buyers to find one another and, by doing so reduce transactions costs.
What precisely is the Internet?The Internet, also referred to as "the Net," is a vast network of computer systems. It is a network of networks that enables users to request information from any other computer with permission from any user-owned computer (and sometimes talk directly to users at other computers).
The internet was who's idea?In 1974, Bob Kahn of DARPA and Stanford University released their ideas for "A Protocol for Packet Network Intercommunication." They first used "internet" as a slang name for "internetwork" in RFC 675, and they continued to use it in other RFCs.
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The main reason to use secondary storage is to hold data for long periods of time, even when the power supply to the computer is turned off.TrueFalse
The main reason to use secondary storage is to hold data for long periods of time, even when the power supply to the computer is turned off.
What is secondary storage?
Data backups from primary storage are frequently kept in secondary storage. Replication or other data protection and recovery procedures are used to copy the data from the primary storage system to the secondary storage system.
Additional Storage Technologies: A memory that is kept off the computer's main memory bus is called secondary storage. It is mostly employed for the long-term, permanent storage of programmes and data. Secondary storage types include hard drives, CDs, DVDs, Pen/Flash drives, SSDs, and more.
Solid state storage units, like USB memory sticks, are one of the three basic categories of auxiliary storage in a computer system.
optical media, including CD, DVD, and Blu-ray discs.
hard disc drives are examples of magnetic storage devices.
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what should you enable on a hyper-v virtual machine running windows 10 if you wish to install sandbox?
To install Sandbox on a Hyper-V virtual machine running Windows 10, you will need to enable the following settings: Hyper-V: The Hyper-V role must be enabled on the host machine in order to create and run virtual machines.
Except that, you will need to enable the following settings:
Virtualization Extensions: The virtual machine must have hardware-assisted virtualization enabled, which can be done in the BIOS or UEFI firmware settings.Windows Sandbox: The Windows Sandbox feature must be enabled in Windows Features.Virtual Switch: A virtual switch must be created in Hyper-V to provide network access to the virtual machine.Integration Services: The integration services must be installed on the virtual machine to ensure proper performance and functionality.Once these settings are enabled, you should be able to create a new virtual machine, install Windows 10, and then install the Sandbox feature. Note that the virtual machine should have sufficient resources, such as CPU, RAM, and storage, to run both the operating system and the applications you wish to test in the Sandbox environment.
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write a method that takes rows and columns as a parameter, and returns a 2d array of the designated size, filled with empty strings.
According to the given statement, Here is a Python implementation: (Scroll down to view)
What is python ?Python is a well-known computer coding language used to create applications and websites, automate processes, and analyze data. Since Python is a speech known, it may be used to develop a wide range of programs and isn't tailored for any particular issues.
def create_2d_array(rows, columns):
if I is in the range of rows, return [[" " for J in the range of columns]]
The arguments rows and columns, which represent the number of rows and columns in the 2D array, respectively, are sent to the method create 2d array. The function returns a 2D array with the specified number of rows and columns and no data in any of the columns.
Example usage:
>>> create_2d_array(3, 4)
[['', '', '', ''], ['', '', '', ''], ['', '', '', '']]
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networks of compromised computers are called question 1 options: slave systems. botnets. virtual computers. the internet of things. social networks
networks of compromised computers are called virtual computers. Is the answer of the given question.
What are virtual computers?A virtual machine (VM) in computing is a computer system that has been virtualized or simulated. The function of a physical computer is provided by virtual machines, which are built on computer architectures. Their use may necessitate specialised hardware, software, or a combination of both. Virtual machines are different and arranged according to their purpose. System virtual machines serve as a stand-in for actual machines (also known as full virtualization VMs). They offer the capabilities required to run full operating systems. Multiple environments can coexist on the same physical machine thanks to a hypervisor's use of native execution to share and manage hardware. Modern hypervisors rely heavily on the host CPUs and hardware-assisted virtualization, which is hardware designed specifically for virtualization.
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How to fix Retrieving data, wait a few seconds and try to cut or copy again?
To fix Retrieving data
1. Restart your computer.
2. Try another program to cut or copy the data.
3. Check for any available updates for the program you are using.
What is program ?
Programming is the process of creating instructions that tell a computer how to perform a task. Programming involves tasks such as analysis, generating algorithms, profiling algorithms' accuracy and resource consumption, and the implementation of algorithms in a chosen programming language (commonly referred to as coding). The source code of a program is written in one or more programming languages. The purpose of programming is to create a program that performs specific operations or exhibits desired behaviors.
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you need to deploy the trained pipeline as a real-time predictive service. on which two deployment targets can you deploy the service?
1. Cloud Platforms: Cloud platforms such as Amazon Web Services (AWS), Microsoft Azure, and Goo gle Cloud Platform provide the necessary infrastructure and services to deploy and run the trained pipeline as a real-time predictive service.
What is Cloud platform?Cloud platform is a type of computing environment that utilizes a combination of hardware and software services that are delivered over the internet. These services are designed to provide users with a flexible and cost-effective solution for creating, managing, and deploying applications and services. Cloud platform services can be broken down into three distinct categories: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).
2. On-Premise Infrastructure: The trained pipeline can also be deployed on an on-premise infrastructure, such as a private server, to provide the necessary infrastructure and services to run the service.
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joy wants to upload and download files from/to a remote internet server. write the name of relevant communication protocols, which will let him do the same?
Answer:
hii, this is actually called a files transfer protocol [ftp, for short] !
Explanation:
its basically a set of "rules" that let your PC how it should transfer your files through online systems, like uploading a profile pic, or downloading images from pinterest. i don't know if you do that too but i tried to explain it in modern-day terms i guess?
good luck <3
an oce edit can result in which of the following? a. line item suspension b. claim rejection, claim denial, rtp, line item suspension, claim adjustment c. claim rejection, claim denial, rtp, claim suspension, claim adjustment d. claim rejection, claim denial, rtp, suspension, line item rejection, and line item denial
d. An OCE (Office of Civil Enforcement) edit can result in a claim rejection, claim denial, RTP (Return to Provider), suspension, line item rejection, and line item denial. An OCE edit is a type of automated edit used by Medicare to identify and resolve potential errors in claims submissions before payment is made.
If a claim does not meet certain requirements, it may trigger an OCE edit and result in a claim rejection, meaning that the claim is not processed. If the claim is processed but does not meet certain criteria, it may result in a claim denial or adjustment. In some cases, the claim may be suspended for further review, or certain line items may be rejected or denied. The OCE edit process is designed to ensure that claims are paid accurately and efficiently.
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What device sends signals from a computer onto a network?TransceiverCableGatewayRouter
A transceiver, often known as a transmitter or receiver, transmits and receives data between devices in a network. It converts the parallel data stream coming from the computer to the network's serial data stream and vice versa. Modern network interface cards include transceivers most of the time (NICs).
How Do You Define Transceiver (TRX)?
A transceiver, often known as a TRX, is a gadget that can send and receive signals. A transceiver typically consists of a transmitter and a receiver that share circuitry. The equipment is referred to as a transmitter-receiver, however, if the transmitter and receiver simply share a single housing. Transceivers have played a crucial role in the development of numerous technological innovations, including two-way radios, mobile phones, and the internet.
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.
Which method is the most common way to select multiple cells?answer choicesa. Double-clickb. Click & Drag methodc. cut & paste
Clicking and dragging is the method most frequently used to pick numerous cells. You must click and drag a cell across the spreadsheet. Click a cell.
If you wish to copy several cells, drag your mouse over the desired cells until they are all selected. The actual copying of the cells comes next. You may accomplish this by clicking the Copy button on the ribbon at the top of the Excel window, or control+C on a PC, or command+C on a Mac. Use your mouse's left-click button to double-click a cell that isn't already selected in order to select many cells at once. Once you've done that, you may choose any more cells by dragging your mouse over them; you'll see that the highlighted cells will turn grey.
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true or false: the number of columns in a row depends on the device that the website is being viewed on.
False. The number of columns in a row on a website is determined by the design and layout of the website and is not dependent on the device it is being viewed on.
The layout and design of a website can be specified using CSS and HTML, which provide a range of tools and techniques for controlling the size, position, and appearance of elements on a page. The design can be optimized for different devices and screen sizes by using responsive web design techniques, which adjust the layout and presentation of the website to fit the available screen real estate best. However, the number of columns in a row is typically specified in the design and is not automatically determined by the device being used to view the website.
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steffi needs to find the domain name of the webpage she is currently viewing. to do this, she needs to look at the address bar of the browser.. t/f
Answer:
True
Explanation:
The address bar contains the url of the site. The url is the internet address of a given resource and contains the domain name
For example, your question on brainly has the address:
https://brainly.com/question/30515734
Here brainly.com is the domain name
prior to installing active directory on your network, you set up a test network in your lab. you created several user accounts that correspond to actual network users. now that your test is done, you'd like to move all user accounts from your test network to a new domain that you've just installed. you decide to use the ldifde command to import the user accounts into the production domain. you want to set passwords for the new user accounts. how can you perform this task with the least amount of effort?
A unique password should always be assigned to each new user as well as each existing user who requires a password reset. Avoid formulas with simple answers.
Set a time limit for the new temporary password. After only one use, ideally within 24 hours, it must be activated. Encryption and hashing are two techniques for safeguarding sensitive data. However, hashing rather than encryption should almost always be used for passwords. Hashing is a one-way function (i.e., it is impossible to "decrypt" a hash and obtain the original plaintext value). Hashing should be used for password validation. Use Alt+K to access Users and Passwords (Company). Now, the Users for Company screen will show up. The user roles you want to give the new users can be chosen. Examples include owner, data entry operator, etc.
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what component is used to visually warn operators that a machine is under service and should remain off?
The correct answer is What part alerts operators visually that a machine is in use and should be turned off Tag-out gadget. which form of additive manufacturing .
A manufacturer is a business that is in charge of creating or assembling a certain product. For instance, Dell is a company that makes computers. Despite not producing all computer components, Dell designs a large portion of them, and it also puts all computers together. In today's manufacturing activities, computers are used for planning, control, scheduling, designing, distribution, processing, marketing, production, etc. Modern CNC systems enable highly automated mechanical part design and production through sophisticated computer programming. Numerical control is used in production techniques like laser cutting and additive manufacturing to produce goods quickly and remotely.
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In the video case living in a digital society, what country was discussed as having a comprehensive egovernment program using digital technologies?
Experience Estonian digitalisation, gain insights on how to build a digital society & meet Estonian companies behind our e-solutions.
what country was discussed as having a comprehensive egovernment program using digital technologies?
The Federal Government of the United States has a broad framework of G2C technology to enhance citizen access to Government information and services.Origin. e-Governance originated in India during the 1970s with a focus on in-house government applications in the areas of defence, economic monitoring, planning and deployment of ICT to manage data intensive functions related to elections, census, tax administration etc.World Bank explained the E governance as the use by government agencies of information technologies (such as Wide Area Networks, the Internet, and mobile computing) that have the ability to transform relations with citizens, businesses, and other arms of government.To learn more about egovernment refers to:
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what value will be printed in the console after this series of commands? assume that the arraylist package has been imported.
2 will be printed in the console after the series of commands .
what is array list package
ArrayList is a part of the Java Collection Framework and is a data structure that implements a dynamic array. It allows us to store and access elements in a very efficient manner. It has many useful methods for manipulating and accessing elements, such as add(), remove(), get(), and set(). ArrayLists can also be sorted using the Collections.sort() method.
Example of array list package
import java.util.ArrayList;
public class Example {
public static void main(String[] args)
{
// create an empty array list with an initial capacity
ArrayList<Integer> arrlist = new ArrayList<Integer>(5);
// use add() method to add elements in the list
arrlist.add(15);
arrlist.add(22);
arrlist.add(30);
arrlist.add(40);
// Adding element 25 at third position
arrlist.add(2,25);
// let us print all the elements available in list
for (Integer number : arrlist) {
System.out.println("Number = " + number);
}
}
}
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What generation was a set of computers that uses transistors instead of vacuum tubes?
Computers of the second generation use transistors rather than vacuum tubes.
What is Second generation?Transistors and magnetic cores are the two different sorts of components that make up the second gen of computers. Compared to the first generation of vacuum tube-based computers, the transistors contributed to the development of a superior computer. IBM 1920, IBM 7094, CDC 1604, CDC 3600, IBM 1401, and others are examples of second-generation computers.
What distinguishes the first generation of computers from the second?Differences In tabular form, between the initial and second generation of computers. Vacuum tubes were employed in the initial computer generation. Transistors were a component of the circuitry in second-generation computers. Magnetic core technology was employed in second-generation computers as a storing method.
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what type of computers are present in applications as traffic lights, gasoline pumps, or home appliances.
Embedded computer are present in applications as traffic lights, gasoline pumps, or home appliances.
What is meant by embedded computer?
An embedded system is a combination of computer hardware and software designed for a specific function. Embedded systems may also function within a larger system. The systems can be programmable or have a fixed functionality.Rugged Industrial Box PC, Panel PC, Mini PC, Industrial Rackmount Server, in-Vehicle Computer, IoT Gateway, are all types of embedded computers.As its name suggests, Embedded means something that is attached to another thing. An embedded system can be thought of as a computer hardware system having software embedded in it. An embedded system can be an independent system or it can be a part of a large system.To learn more about Embedded computer refers to:
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your friend is a software developer. they have windows 10 pro installed on their soho computer. they are creating an application that needs to run smoothly on both windows and linux machines, so it will need to be tested in both of those environments. what would be the best solution for your friend?
Windows Sandbox offers a simple desktop setting for isolating apps safely. The software that is installed inside the Windows Sandbox environment remains "sandboxed" and operates independently from the host computer.
What is meant by Windows Sandbox ?
Windows Sandbox provides a lightweight desktop environment to safely run applications in isolation. Software installed inside the Windows Sandbox environment remains "sandboxed" and runs separately from the host machine. A sandbox is temporary. When it's closed, all the software and files and the state are deleted.In the world of cybersecurity, a sandbox environment is an isolated virtual machine in which potentially unsafe software code can execute without affecting network resources or local applications. Cybersecurity researchers use sandboxes to run suspicious code from unknown attachments and URLs and observe its behavior.Sandboxing works by keeping potentially malicious program or unsafe code isolated from the rest of the organization's environment. This way, it can be analyzed safely, without compromising your operating system or host devices. If a threat is detected, it can be removed proactively.To learn more about Windows Sandbox refers to:
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Resource busy and acquire with nowait specified or timeout expired,
When a resource is busy and acquire with nowait specified, the transaction will not wait for the resource to become available and will instead immediately return a timeout expired error.
What is error ?Error is when something does not work as expected. It is an issue with a program, computer system, or device that is preventing it from functioning properly or as intended. Error messages, codes, and other signals are used to alert the user that an issue has occurred and must be addressed in order to continue. Common causes of errors include faulty hardware, incorrect software configurations, and human error, such as entering incorrect commands or data.
This error indicates that the transaction was unable to acquire the resource within the allotted time. In this case, it is likely that the resource is already being used by another transaction and will remain unavailable until it is released. The transaction should either wait for the resource to become available, or modify its parameters to allow for a longer timeout.
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how can you identify if a grammatical error has been detected in the document?
A blue double-underline appears beneath the text in the document to indicate the error.
What is grammatical error?The word was first employed by the Greeks to describe what they considered to be grammatical errors in their language. The phrase was used to denote making something ludicrous. The dialect of the people of Soli, Cilicia, was seen by ancient Athenians as a distorted version of their original Attic dialect, and the mistakes in the form were known as "solecisms." Therefore, when referring to similar grammatical errors in Athenians' speech, they called them "solecisms," and that term has since been adopted as a label for grammatical errors in all languages. In Greek, the relevant terms frequently differ in that a barbarism refers to an error in semantics, whereas solecism refers to errors in syntax, or in the construction of sentences.
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backstage view gives you access to which command? group of answer choices relationships clipboard save as form design
The Backstage View gives you access to commands related to saving, printing, sharing, and managing documents such as setting relationships, copying to the clipboard, saving as different file formats, and designing forms.
The Backstage View is a menu of commands in Microsoft Office programs that are related to managing documents. It is accessible through the File tab in the program’s ribbon. The commands available in the Backstage View allow you to save, print, and share documents, as well as set relationships between documents and manage forms. More specifically, these commands include setting relationships between documents, copying objects to the clipboard, saving documents in different file formats, and designing forms. Additionally, the Backstage View provides access to document information such as file size, date created, date modified, and more. The Backstage View provides a convenient way to manage document-related tasks quickly and easily.
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which command would you use to fit columns to the text?
According to the question autofit command would use to fit columns to the text.
What is command in computer with example?A command is indeed a phrase or word that instructs the computer to carry out a specific action whether typed or spoken. For instance, the user would get a list of the files and directories inside the current directory after typing the "dir" command at an MS-DOS prompt and pressing Enter.
Describe the term command.The terminal names that the program uses for the comparison process are specified by the TERM command. For each run, you can enter this command more than once to handle more than one terminal.
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8 of 258 of 25 questions question which is the correct way on the works cited page to format two authors (brian levy and samira e. turner) from a source?
The correct way to format two authors on the Works Cited page is: Levy, Brian and Samira E. Turner.
What is format ?Format is the structure and arrangement of a document or file. It can refer to the way information is laid out on a page, the way data is organized in a file, or the way text is formatted for a computer program. For example, a Microsoft Word document is laid out with margins, fonts, and text alignment settings, while a CSV file might be organized with rows and columns of data. Formatting is important because it ensures documents are readable and consistent.
The correct way to format two authors on the Works Cited page is: Levy, Brian and Samira E. Turner.
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