The keyword that needs to be added to a variable declared inside a function so that its value is accessible throughout the program is global.
A variable is a named storage area in a computer program that holds a value. A variable is like a container that holds data that can be utilized in a computer program. A variable declared inside a function in Python has a local scope. It means that the variable can only be accessed within the function in which it is defined. If we want to use the value of a variable declared inside a function outside the function, we have to use the global keyword.
The global keyword in Python is used to indicate that the variable is a global variable, and its value can be accessed throughout the program. To declare a variable as a global variable in Python, we can use the global keyword as shown below:
Example: global variable_nameTo modify the value of a global variable inside a function, we have to use the global keyword as shown below:
Example: global variable_namevariable_name = new_valueThe global keyword in Python can also be used to modify the value of a global variable inside a function.
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to make a deque behave like a stack, which methods should be used for element insertion and removal?
To make a deque behave like a stack, the methods that should be used for element insertion and removal are push() and pop().
What is a Deque?
Deque stands for a "double-ended queue," which means it is a sequence of elements in which items may be added or removed from both ends simultaneously. It has two ends, a head and a tail, and allows elements to be removed and inserted at either end.Here, we are talking about how to make a deque behave like a stack, and for that, we can use the push() and pop() methods.
Below is how they work:
Element Insertion:Push(): This method is used to insert a new element at the top of the deque. It inserts an element at the head side of the deque (left side in the above figure).
Syntax: deque.push(element)Element Removal:Pop(): This method removes and returns the top element of the deque. It removes an element from the head side of the deque (left side in the above figure).Syntax: deque.pop()
Therefore, using these methods, we can make a deque behave like a stack.
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a chief security officer is looking for a solution that can provide increased scalability and flexibility for back end infrastructure, allowing it to be updated and modified without disruption to services. the security architect would like the solution selected to reduce the back end server resources and has highlighted that session persistence is not important for the applications running on the back end servers. which of the following would best meet the requirements? a.Reverse proxy
b.Automated patch management
c.Snapshots
d.NIC teaming
A. Reverse Proxy - Reverse proxy provides increased scalability and flexibility for back end infrastructure, allowing it to be updated and modified without disruption to services.
It also reduces the back end server resources as session persistence is not important for the applications running on the back end servers.
The solution that would best meet the requirements is Reverse proxy. What is Reverse proxy? A reverse proxy is a type of proxy server that retrieves resources on behalf of a client from one or more servers. It makes requests to multiple servers on behalf of a client, and it returns the server's response as if it were the original requester.
A reverse proxy can intercept and process all requests to the backend servers that are handled in a controlled and consistent manner.In summary, the reverse proxy has the following characteristics: Scalability: The reverse proxy can handle more than one request at a time.
It will spread the requests across the backend servers, resulting in greater scalability. Flexibility: It can be used to change the backend infrastructure and to update or modify the backend infrastructure without causing disruption to services.
Reduced server resources: The reverse proxy can reduce the backend server resources needed to handle incoming requests. Session persistence: Session persistence is not important for the applications running on the backend servers, so it meets the requirements given above.
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fai is the company hr manager and wants to create a type of cloud that would only be accessible to other hr managers. which type of cloud would best fit fai's need? a. public cloud b. group cloud c. hybrid cloud d. community cloud
Fai needs a type of cloud that is restricted to other HR managers, therefore, the most suitable cloud for Fai's requirements would be a community cloud. The correct option is d. community cloud.
A community cloud is a type of cloud infrastructure that is shared by several organizations that have a common interest, such as HR managers. The community cloud is accessible only to members of the community, providing Fai with the necessary security and access control.
Cloud computing offers a wide range of options for businesses to store, manage, and process their data. The correct option is d. community cloud.
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Look at where Scratch Cat is standing. What will Scratch Cat say when the green flag is clicked and the program is run?
Hello! My name is Scratch Cat. What is your name?
Hello! What is your name?
My name is Scratch Cat. What is your name?
What is your name?
Scratch Cat will say "Hello! My name is Scratch Cat. What is your name?" when the green flag is clicked and the program is run.
The given program shows that Scratch Cat is standing in the center of the screen, and when the green flag is clicked, it will say "Hello! My name is Scratch Cat. What is your name?" Therefore, the correct option is "Hello! My name is Scratch Cat. What is your name?" while running the program.
Scratch Cat is the mascot for the educational programming language Scratch. Scratch is a visual programming language that allows you to create animations, games, and interactive stories. It's a great tool for learning to code because it's easy to use and provides instant feedback. Scratch Cat appears in various poses and outfits in the Scratch programming interface.
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When a track is record-enabled and Pro Tools is playing, this monitoring mode switches between monitoring the previously recorded audio on the track(when playing back), and live input (once your press record). This mode often used when punching in.
Auto Input Monitoring
Auto Input Monitoring is a monitoring mode which switches between monitoring the previously recorded audio on a track and live input when record-enabled and Pro Tools is playing.
This mode is often used when punching in.
Auto Input Monitoring is a Pro Tools feature that is used when punching in during the recording process. It is a monitoring mode that automatically switches between monitoring the previously recorded audio on the track when playing back and live input when you press record.
Auto Input Monitoring ensures that the user is hearing only the input source when recording, regardless of whether the track is record-enabled or not. It is an essential feature for achieving accurate recordings when punching in.
The main advantage of Auto Input Monitoring is that it enables a user to hear the live input source without latency when recording in real-time. This can be useful for recording music, dialogue, and other audio sources where timing is critical. In summary, Auto Input Monitoring is a feature that automatically switches between monitoring the previously recorded audio on a track and live input when punching in.
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to increase security of data stored on an rodc, what can be configured to specify domain objects that aren't replicated to rodcs?
To increase the security of data stored on an RODC, the domain objects that are not replicated to RODCs can be configured. This can be achieved by specifying domain objects that are not replicated to RODCs.
A read-only domain controller (RODC) is a domain controller that stores a copy of an Active Directory database. An RODC is usually used in locations where network security is poor or non-existent. This ensures that even if the RODC is compromised, the security of the entire network is not jeopardized.
Active Directory consists of the following types of domain controllers:
Domain controllers that are read-write (RWDC)Domain controllers that are read-only (RODC)RODCs are used to secure remote sites, such as branch offices or retail stores, that have low physical security or inadequate network infrastructure.An RODC is a new category of the domain controller that has been introduced to improve security at remote locations. The primary function of an RODC is to cache user passwords. The use of an RODC will not be able to modify user passwords, computer accounts, or domain metadata stored on RWDCs to ensure that the RODC is secure.
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which is true? question 3 options: garbage collection makes programs run faster deallocated objects can be reclaimed by a programmer garbage collection is managed automatically by the java virtual machine an object is deallocated when its reference count decrements to one
The true statement is "Garbage collection is managed automatically by the Java virtual machine."Garbage collection is a process in which the Java virtual machine automatically memory.
This frees up memory for other objects to be created and used, ultimately improving the program's performance. However, it is not true that garbage collection makes programs run faster, as it adds some overhead and may temporarily pause the program's execution.objects cannot be reclaimed by a programmer, as it is the responsibility of the garbage collector to manage the memory. The concept of reference counting, where objects are deallocated when their reference count decrements to one, is not used by the Java virtual . algorithm to determine which objects are no longer needed and can be freed from memory.
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(mrh ch04-300) you are trying to decide whether to accept or reject a statement about your widgets. this statement is called a
You are trying to decide whether to accept or reject a statement about your widgets. This statement is called a hypothesis.
In statistics, a hypothesis is a statement or assumption about a population parameter that is to be tested using data from a sample. The hypothesis is typically expressed in terms of a null hypothesis and an alternative hypothesis.
The null hypothesis represents the status quo or the default assumption, while the alternative hypothesis represents the researcher's hypothesis or the alternative assumption. The goal of statistical testing is to evaluate the evidence against the null hypothesis and determine whether it should be rejected in favor of the alternative hypothesis.
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which is an indicator of a false id?a.the card can be peeled apartb.ghost image of the photographc.bar code on the backsided.raised letters on the face
The card can be peeled apart as an indicator of a false ID.
False identification documents or false IDs are identification documents that do not come from an authorized source. They are commonly used by people who want to disguise their real identities, such as identity thieves, criminals, and spies. This is a serious criminal act, and using a false ID may result in the perpetrator being sentenced to jail time.
The following are the most common types of false identification cards used by fraudsters and criminals:
Counterfeit ID Cards
These are fake IDs created by duplicating a genuine ID card, such as a driver's license. The counterfeit ID cards are constructed using high-quality printers and specialty paper to make them appear genuine.
Forged ID Cards
A forged ID card is entirely made up of false information. They are created by fraudsters, who use software or high-quality printers to produce them. They're also known as "novelty IDs" or "funny IDs."
Stolen ID Cards
These are IDs that are stolen from legitimate sources, such as a driver's license. The criminal who steals them is likely to use them to commit crimes.
Indicators of a false ID card there are several indicators that you should look for to recognize false ID cards. Here are a few of them:
Lamination
A legitimate ID card will have a transparent protective layer over it. However, if the card is a fake, the lamination may have bubbles or a peeling edge.
The Image of the photograph
A counterfeit ID will have a low-quality photo or no photo at all. Also, the photograph may not be centered correctly, or the head size may not be proportional to the body size.
Printing
The printing on the fake ID card may appear too bright or too dim, and the text may not be aligned correctly.
Material
The materials utilized to create the ID card may be of inferior quality, or the card may be flimsy.
Raised Lettering
Raised letters may be missing on a counterfeit ID card, making it simple to detect.
Bar Code
A legitimate ID card should have a bar code on the back, but a false ID may lack this feature.
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the first step in the sdlc is to define the problems to be addressed by the it system, examine different alternatives, and report the findings. this is called the step.
The first step in the SDLC is to define the problems to be addressed by the IT system, examine different alternatives, and report the findings. This is called the analysis step.
What is SDLC?The SDLC, or Systems Development Life Cycle, is a methodology for developing software applications. The Systems Development Life Cycle is a systematic approach to software development. This approach entails many stages, each with its objectives and outcomes. The five phases of the SDLC are planning, analysis, design, implementation, and maintenance. The analysis step is the second phase of the SDLC.
What happens in the analysis stage of the SDLC?The analysis step of the SDLC is where the development team examines the requirements gathered in the planning stage. The goal of the analysis phase is to comprehend the organization's requirements and objectives for a new system, as well as to determine whether or not a new system is required. The team examines current systems, identifies issues, and proposes potential solutions during the analysis phase. They are essentially analyzing the gathered requirements and evaluating them against the existing system to determine whether the suggested solution is feasible or not. The analysis stage of the SDLC concludes with a report summarizing the findings, and the team makes a recommendation on whether to proceed with the next phase or abandon the project.
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suppose we'd like to access an element at an arbitrary index wihtin a linked list. what would be the efficiency?
To access an element at an arbitrary index within a linked list, the efficiency would be O(n).
Explanation: In a linked list, the elements are not stored in contiguous memory locations. Instead, each element or node has a pointer pointing to the next node. So, in order to access an element at an arbitrary index, we need to traverse the list from the first node until we reach the node at the desired index.
As each node in the list has only a pointer to the next node, it is not possible to access a node directly without traversing the entire list. Hence, to access an element at an arbitrary index within a linked list, the efficiency would be O(n).
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The efficiency is O(n) to access an element at an arbitrary index wihtin a linked list.
Suppose we'd like to access an element at an arbitrary index within a linked list. When we look up an element in a linked list, we'll have to search through the entire list to find it. As a result, if the element is not in the first place, it will take a long time to discover.
As a result, in terms of time complexity, linked lists have O(n) efficiency. The linear search algorithm is used to access an element in a linked list. Here's how the algorithm works:
1. begin at the beginning of the list
2. Check whether the data in the node matches the target value.
3. If the data in the node matches the target value, return the node.
4. If the target value is not found, go to the next node in the list.
5. If the list is empty, the search is completed; otherwise, repeat steps 2 through 4. The time complexity of this algorithm is O(n) because it must search through the entire list to find the desired element.
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which is an example of an input device? a. a cathode ray tube b. an inkjet printer c. an organic light-emitting diode d. a barcode reader
An example of an input device is d. a barcode reader.
An input device is a hardware component that is used to enter data or commands into a computer. A barcode reader is an input device that is used to read and decode barcodes. Barcodes are widely used in retail and inventory management, and a barcode reader makes it easy to enter large amounts of data quickly and accurately. Other examples of input devices include keyboards, mice, scanners, and cameras. A cathode ray tube (CRT), an inkjet printer, and an organic light-emitting diode (OLED) are all output devices, which are used to display or produce information from a computer.
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write a program that prompts the user to enter a string and displays the maximum increasingly ordered sub-sequence of characters.
This program prompts the user to enter a string and then displays the maximum increasing ordered sub-sequence of characters.
#include <iostream>
#include <string>
using namespace std;
int main()
{
//declare string
string s;
//prompt user to enter a string
cout << "Please enter a string: ";
cin >> s;
//calculate the maximum increasingly ordered subsequence
int maxIncreasingOrder = 0;
int currentIncreasingOrder = 0;
char prevChar = ' ';
for(int i = 0; i < s.length(); i++) {
char currentChar = s[i];
if (currentChar >= prevChar) {
currentIncreasingOrder++;
} else {
if (currentIncreasingOrder > maxIncreasingOrder)
maxIncreasingOrder = currentIncreasingOrder;
currentIncreasingOrder = 1;
}
prevChar = currentChar;
}
//display the result
cout << "The maximum increasing ordered sub-sequence of characters is: " << maxIncreasingOrder << endl;
return 0;
}
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a binary number is an integer made up of only 0s and 1s. for example, 110111101 is a binary number. what is the smallest binary number divisible by 225?
The smallest binary number that is divisible by 225 is 1110001000.
A binary number is an integer that is made up of only 0s and 1s. It is a numeral system based on the binary system. The decimal system, which is based on 10, is what we use every day. The binary system, on the other hand, is based on 2. Any integer in the decimal system can be converted to the binary system with ease. Decimal numbers are translated to binary numbers by converting the decimal number to a binary number system by representing it in the powers of 2. The method of repeated division by 2 is used to convert decimal numbers to binary numbers. Given 225 is a 5 × 3 × 5 × 3. So, for any number to be divisible by 225, it must be divisible by 5 × 5 × 3 × 3. For the number to be divisible by 5, the last digit of the binary number must be 0.
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a direct-mapped cache is a special case of a set-associative cache. which set-associative cache is actually direct-mapped
A direct-mapped cache is a type of set-associative cache where each block of data is mapped to a single set in the cache. It is the simplest form of a set-associative cache and is most efficient when accessing large blocks of data.
In a direct-mapped cache, all data from a single memory address is always placed in the same cache set. This means that it takes less time to find the data in the cache since it is always in the same place. The data is placed in the same place regardless of whether or not it is the same type of data as what is already in the cache.
When it comes to direct-mapped caches, they are the same as any other set-associative cache, except that they are limited to a single set. This means that there can only be one block of data stored in a single set, thus making it the most restrictive type of set-associative cache. It can be used for applications that require frequent access to large blocks of data. This is because there is no need to search for the data in multiple sets, saving time and resources.
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what do you need if you want to read, send, and organize e-mail from any computer connected to the internet?
In order to read, send, and organize e-mail from any computer connected to the internet, you will need a web-based e-mail account.
Web-based email accounts are also known as webmail accounts, online email accounts, or cloud-based email accounts. They are a type of email account that allows users to access their email messages and manage their email inbox through a web browser rather than an email client software installed on a local device.
To use a web-based email account, all you need is an internet connection and a web browser. You can log in to your email account from any computer, tablet, or mobile device that has internet access and a compatible web browser. This makes it easy for users to check their email from anywhere in the world, without having to worry about installing or configuring email client software.
Web-based email accounts provide several advantages over traditional email clients. , web-based email accounts are usually free, which makes them an attractive option for many users.
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how to block a website from knowing the same acocoutn is logged in on two dfifreant things at same time
To block a website from knowing the same account is logged in on two different things at the same time, you can use a virtual private network (VPN).
A VPN will mask your IP address and give you a new one, allowing you to use the same account on different devices without being detected. To set up a VPN, first, you need to sign up for a VPN service. Then, download the software to your device, open the app, and log in using the credentials provided by your VPN provider. Then, select the country you would like to connect to. Once the connection is established, you will have a new IP address.
You can also use an extension to change your IP address and block a website from knowing the same account is logged in. Look for a good extension that can change your IP address and install it on your browser. Once installed, you can use the same account on different devices without being detected.
By following these steps, you can successfully block a website from knowing the same account is logged in on two different things at the same time.
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int x is 1000000 and int y is 2000000. outputting x * y will result in overflow. what is likely to appear at the output?
When int x is 1000000 and int y is 2000000, outputting x × y will result in an integer overflow. The likely output is either a very large negative number or a value of 0. To avoid integer overflows, use larger data types or other techniques such as using an array of smaller integers.
An integer overflow occurs when the value of a calculation exceeds the maximum value that can be stored in an integer. This causes an error that can cause unexpected results in the program. In this case, the likely output is either a very large negative number or a value of 0.
To explain further, when an integer overflow occurs, the number being stored is too large to fit within the maximum range of an integer. So, the output will be either a very large negative number or a value of 0. This is because the maximum range of an integer is usually the same for both positive and negative numbers, so when the number exceeds that maximum range, the output will either be 0 or a very large negative number.
To avoid integer overflows, you should use larger data types such as long or double. These data types have larger ranges which can prevent integer overflows. Additionally, you can also use other techniques such as using an array of smaller integers to store a larger number.
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today, most data kept by companies is stored in databases. when might it be appropriate to use text files? describe the steps that must be taken when a data file is used by a program?
Today, most data kept by companies is stored in databases. However, there are some cases where text files are appropriate.
It may be appropriate to use text files when the data needs to be easily shared and edited by multiple users without the use of a database. Additionally, text files may be used in smaller projects or for temporary storage. For example, a configuration file for a program may be stored as a text file. Steps that must be taken when a data file is used by a program are:
Open the file for reading or writing: This step is performed to give the computer access to the file and ensure that the file is properly read or written.
Read or write to the file: This is the step where data is either read from or written to the file. This data can be manipulated or processed by the program.
Close the file: Once the program is finished with the file, it should be properly closed to free up resources and ensure the file is saved correctly.
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computer-aided manufacturing (cam) uses computers to develop and control the production process. true false
The statement "computer-aided manufacturing (CAM) uses computers to develop and control the production process" is TRUE.
What is computer-aided manufacturing (CAM)?Computer-aided manufacturing (CAM) is a software-driven system that controls the manufacturing process, including CNC milling and turning machines, lathes, welding machines, and more. CAM uses computers to plan and control the production process, from the creation of design models to the loading of content on machines. CAM is frequently used in manufacturing sectors such as automotive, aerospace, and shipbuilding, among others, to increase efficiency and accuracy, as well as to reduce waste and production time.
True, computer-aided manufacturing (CAM) uses computers to develop and control the production process.
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Online classified ads are an example of C2C e-commercea. Trueb. False
The statement "online classified ads are an example of C2C e-commerce is TRUE" because online classified ads are an example of C2C e-commerce.
Online classified ads are a type of C2C (consumer-to-consumer) e-commerce, where individuals can buy and sell goods and services directly with each other through online platforms. In the case of online classified ads, individuals can post ads for items they want to sell, and other individuals can browse those ads and contact the seller directly to make a purchase.
This type of e-commerce platform enables individuals to conduct transactions without the need for intermediaries, such as retailers or wholesalers. It is a popular form of e-commerce for buying and selling used or second-hand goods.
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All of the following are examples of ancillary functions you may be asked to do in your department as a user of information systems (IS) except ________.
Group of answer choices
Create a database
Perform tasks while the system is down.
Protect the security of the system
Employ the system
Back up data
Except for doing duties while the system is down, all of the following are examples of auxiliary functions you may be required to conduct in your department as an information system (IS) user.
What exactly is an information system?An information system (IS) is a collection of components that acquire, process, store, and distribute data in an organization to aid decision-making, control, coordination, analysis, and visualization.
Information systems are employed in many different fields, including business, finance, logistics, and healthcare. As a user of information systems (IS), you may be requested to perform the following ancillary duties in your department:
Make a database.
Maintain the system's security.
Use the system.
Make a backup of your data.
But, as an information system user, doing duties while the system is down is not an additional duty you may be requested to conduct in your department (IS). When a system fails, users must report the problem to the IT staff rather than executing any tasks.
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which type of variable is not recommended to be used in programs because they make programs hard to understand and debug?
Global variables are the kind of variable that is not advised to be used in programs since they make programs difficult to comprehend and debug.
Know what are global variables! Global variables are those that are available to all parts of a program, that is, they have a global scope. Variables that are restricted to a specific function or block of code are known as local variables. The following are the drawbacks of using global variables: Debugging and testing are made more difficult by global variables. It is difficult to keep track of the application's state if there are many global variables. When two or more parts of a program are utilizing the same variable for various functions, global variables can generate confusion.
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write a program that prompts the user to input three numbers.the program should then output the numbers in ascending order, separated by a single space.
When the program is run, it will prompt the user to input three numbers. After the user enters the three numbers, the program will create a list of the numbers and sort the list in ascending order. Finally, the program will output the numbers in ascending order, separated by a single space.
you can use the following code:
# Prompt the user to input three numbers
num1 = int(input("Enter the first number: "))
num2 = int(input("Enter the second number: "))
num3 = int(input("Enter the third number: "))
# Create a list of the three numbers
numbers = [num1, num2, num3]
# Sort the list in ascending order
numbers.sort()
# Output the numbers in ascending order
print("The numbers in ascending order are:", end=" ")
for num in numbers:
print(num, end=" ")
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in what ways does amazon simple storage service (amazon s3) object storage differ from block and file storage
Amazon Simple Storage Service (Amazon S3) is an object storage service offered by Amazon Web Services (AWS), which differs from block and file storage is:
Data organizationScalabilityUse casesObject storage organizes data as individual objects, each with its own unique identifier, metadata, and data. Block and file storage organize data as blocks and files, respectively. Object storage is highly scalable, allowing users to store and retrieve virtually unlimited amounts of data. Block and file storage have scalability limits that are determined by the size of the storage device. The internet's storage is provided by Amazon Simple Storage Service (Amazon S3). Any quantity of data may be stored and retrieved with Amazon S3 at any time from any location on the internet.
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what are two protocols that are used by aaa to authenticate users against a central database of usernames and password? (choose two.)
The two protocols used by aaa to authenticate users against a central database of usernames and passwords, are TACACS+ or RADIUS. The correct answer B and E.
RADIUS (Remote Authentication Dial-In User Service) is a widely used protocol for managing user authentication, authorization, and accounting. It was originally developed for dial-up connections but is now used for other types of network connections as well.
TACACS+ (Terminal Access Controller Access-Control System Plus) is a protocol developed by Cisco that provides similar functionality to RADIUS, but with some additional features. TACACS+ separates the authentication, authorization, and accounting functions, allowing for more granular control over each.
Complete question:
What are two protocols that are used by aaa to authenticate users against a central database of usernames and password? (choose two.)
A) NTP
B) TACACS+
C) SSH
D) HTTPS
E)RADIUS
F)CHAP
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when many-to-many relationship in e-r model is mapped into relational data model, the many-to-many relationship relationship is generally represented as
When a many-to-many relationship in the E-R model is mapped into the relational data model, the many-to-many relationship is generally represented as a new table with two or more primary keys.
Know what is the E-R model! The E-R model stands for Entity-Relationship model. This model is a type of data model used in software engineering for describing data or information aspects of a system. E-R model diagram can be used to represent a schema that forms the foundation of an application's relational database. A graphical representation is used in the Entity-relationship model for the representation of entities and their relationships.
In a Relational database, what is a Many-to-Many relationship? A many-to-many relationship happens between two entities when each entity is related to several instances of the other entity type. In a Relational database, Many-to-Many relationships may not be possible to implement as a direct relationship. So, the Many-to-Many relationship is generally represented by an intersection entity or a link table with two or more primary keys. Therefore, when a many-to-many relationship in the E-R model is mapped into the relational data model, the many-to-many relationship is generally represented as a new table with two or more primary keys.
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which control ensures that production files cannot be accessed without specific permission? a. computer services function b. database management system c. recovery operations function d. source program library management system
The files cannot be accessed without specific permission because d. source program library management system.
A source program library management system is a software tool that manages the source code for programs. It typically provides version control, access control, and collaboration features for a team of developers working on a codebase. It ensures that production files cannot be accessed without specific permission by controlling who can access and modify the source code.
The type of access that is given to a person or group for an object or object property is defined by its permissions. For instance, the Finance group may be given Read and Write access to the Payroll file.
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the default comparison condition for the subtype discriminator attribute is the comparison. a.less than b.greater than c.equality d.nonequality
Additionally, disjoint subtypes are subtypes that contain unique subsets of the supertype entity set, not nonunique subsets. The other options mentioned in the query, such as less than, greater than, and nonequality, do not apply to the subtype discriminator attribute comparison.
It is important to note that the subtype discriminator can be null, and each supertype occurrence can be a member of at least one subtype. Overall, the subtype discriminator attribute is an essential feature that enables the entity supertype to inherit the attributes and relationships of the subtype. It allows for a more efficient and structured approach to database design, particularly when dealing with complex data models.
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a cashregister class contains an array list of coin objects. this is best described as an example of . group of answer choices cohesiveness aggregation inheritance association
The array list of coin objects in a cash register class is best described as an example of aggregation.
Aggregation is a mechanism for defining a one-to-many connection between objects, in which an object retains references to one or more instances of other objects. This indicates that the collection of objects is a 'component' of the overall system, and that it is dependent on the main object. However, the objects that make up the collection of objects may exist independently of the main object, and may still be used elsewhere in the system.
Hence, aggregation denotes a "has-a" connection between objects, as opposed to an "is-a" connection. An ArrayList is a class that is used to store a list of objects in Java. The list is ordered, and elements can be added to or removed from any position in the list. An ArrayList class implements the List interface, and so all of the methods of the List interface are available when using an ArrayList object. The most crucial point is that it supports dynamic memory allocation.Therefore the array list of coin objects in a cash register class is best described as an example of aggregation.
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