Based on the given pruning table, the tree with a level of 2 is the best-pruned tree. The pruning table contains four columns: Level, CP, Num Splits, and Relative Error.
The level column contains the tree's depth or number of splits, while the CP column contains the pruning threshold. The Num Splits column contains the number of splits in the tree, and the Relative Error column contains the validation error. The goal of pruning is to simplify the decision tree by removing nodes that are not essential for classification. In decision tree pruning, the tree is initially grown to a substantial size, and then nodes are removed to reduce overfitting. When pruning decision trees, the goal is to locate a subtree that would be more straightforward and give the same or nearly the same prediction. The best-pruned tree is the one that achieves the smallest validation error after pruning. Based on the table given above, the tree with a level of 2 is the best-pruned tree. This tree has a relative error of 0.0612, which is the smallest value among the other trees.
Therefore, the best-pruned tree is the one with a level of 2. Here is the formatted HTML version of the answer:
Level CP Num Splits Relative Error
1 0.500 1.00 1.17
2 0.0507 3.00 0.441
3 0.0020 6.00 0.060
4 0.100 9.00 0.030
Therefore, the answer is the tree with a level of 2.
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you need to write a 10-page research paper for your history class. which of these is the best software option?
Answer: Productivity software.
Explanation:
Productivity software is a software that specializes in creating documents, presentations, spreadsheets, graphs and many other things.
what is the crucial difference between brains/memory and computers that is demonstrated by the deese-roediger-mcdermott (drm) effect?
The crucial difference between human brains/memory and computers, demonstrated by the Deese-Roediger-McDermott (DRM) effect, is that human memory is associative and context-dependent, while computer memory is literal and context-independent.
What is drm effect?
The Deese-Roediger-McDermott (DRM) effect is a phenomenon in memory psychology where individuals are more likely to remember a non-presented word (referred to as a critical lure) that is semantically related to a list of presented words, even though the non-presented word was not actually presented. This effect demonstrates how our memory can be influenced by semantic associations and can result in false memories.
The crucial difference between human brains/memory and computers, demonstrated by the Deese-Roediger-McDermott (DRM) effect, is that human memory is associative and context-dependent, while computer memory is literal and context-independent. The DRM effect refers to the phenomenon where people are more likely to remember words that are semantically related to a list of words they were given, even though those words were not actually presented. This occurs because the human brain is able to make connections and associations between words based on their meaning and context, whereas a computer would not be able to make these connections without being specifically programmed to do so.
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a design defines how to organize information in the files, records, and fields, which is also called
The process of organizing information in files, records, and fields is also known as data design.
Data design involves the arrangement of information into meaningful categories and an understanding of how the categories are related to each other. This can include decisions about the size, type, and format of data fields, as well as the storage and retrieval of data.
Data design is essential for creating efficient and user-friendly databases. It involves creating a data structure that allows the user to quickly and easily access, modify, and manage data. Data design is also important for maintaining the integrity and security of the data, as it ensures that data is stored in an organized and consistent manner.
To create an effective data design, a few factors must be considered. The data design should take into account the data types and characteristics, the user’s requirements and preferences, the expected input and output data, and the frequency of updates. Additionally, the data design must also account for data integrity and security, as well as any hardware or software limitations.
In summary, data design is an important process that involves organizing information into meaningful categories and understanding the relationships between them. Data design should consider the data types and characteristics, the user’s requirements, expected input and output data, frequency of updates, data integrity, and security. Ultimately, data design should be tailored to the user’s needs and be designed for the most efficient storage, retrieval, and manipulation of data.
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the actor of a use case can be another software system or a hardware device that interacts with the system to achieve a useful goal. question 11 options: true false
Yes, it is true that the actor of a use case can be another software system or a hardware device. In use case modeling, an actor is an entity that interacts with the system to achieve a goal.
While actors are typically human users, they can also be other software systems, hardware devices, or even other software components within the same system.
For example, consider a smart home system that allows users to control their home appliances using a mobile app. In this system, the user would be the primary actor, as they are the ones interacting with the system to achieve their goal of controlling their home appliances.
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what term describes a responsive design technique that adapts page elements to a device's screen size by assigning percentage-based dimensions to the elements
The term that describes a responsive design technique that adapts page elements to a device's screen size by assigning percentage-based dimensions to the elements is "fluid layout" or "liquid layout".
In a fluid or liquid layout, elements on the page are sized using relative units, such as percentages or ems, rather than fixed units, such as pixels. This allows the page to adapt to different screen sizes and resolutions, making it more responsive to the user's device. When the user views the page on a larger screen, the elements will expand to fill the available space, while on a smaller screen, the elements will shrink to fit within the limited space.
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which of the following is a characteristic of volatile memory? group of answer choices processor heats up during the operation. files are stored permanently. processing of data is very slow. contents are lost when power is off. it should be purged at least once a year.
A characteristic of volatile memory is that the contents are lost when power is off.
Volatile memory, also known as temporary memory or primary memory, is computer memory that loses its stored information when power is turned off. The term "volatile" is used to describe this type of memory since it is unable to store information permanently without a continuous supply of electricity.
Volatile memory stores data and programs that are currently in use by the computer's CPU. This means that when the power is turned off, the contents of volatile memory are deleted. Because of this, volatile memory is used for tasks that need quick access and are intended to be executed in real-time, such as loading and running applications, browsing the internet, and playing games, among other things.
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which type of member function may only be called from a function that is a member of the same class?
A member function that may only be called from a function that is a member of the same class is known as a private member function.
Private member functions can only be accessed by the members of the same class and cannot be accessed by any other class. Private member functions are usually used to hide implementation details and are declared using the keyword 'private' in the class.
Private member functions are not visible outside the class but are accessible to the members of the same class. For example, a private member function can be used to restrict access to some data members of the class. Private member functions also help to provide data integrity by preventing unauthorized access to the members of the class.
In conclusion, a private member function is a member function that can only be called from a function that is a member of the same class. Private member functions are useful for restricting access to certain data members and also for providing data integrity.
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what nec article should be followed to determine the maximum allowable number of wires or cables permitted in cable trays?
According to NEC (National Electrical Code) article 392, the maximum allowable number of wires and cables that can be placed in a cable tray is determined by the derated ampacity of the cables in the tray, based on the length and type of cable used.
The derated ampacity of the cables in the tray must not exceed the ampacity of the cable tray at the conductor temperature rating. The derated ampacity of the cables is determined by the type and size of the cables and the length of the run.
To determine the maximum allowable number of wires or cables in a cable tray, calculate the ampacity of the cable tray based on the type of cable tray being used. Then, calculate the derated ampacity of the cables based on the type and size of the cables and the length of the run. The derated ampacity of the cables must not exceed the ampacity of the cable tray at the conductor temperature rating. This will determine the maximum number of wires or cables that can be placed in the tray.
In summary, according to NEC article 392, the maximum allowable number of wires or cables permitted in a cable tray is determined by the derated ampacity of the cables in the tray, based on the length and type of cable used. The derated ampacity of the cables must not exceed the ampacity of the cable tray at the conductor temperature rating.
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write a java program containing two classes: dog and a test drive class kennel that has your main method.
Creating a program containing two classes (Dog and Test Drive) with the main method in the Test Drive class is relatively simple. The Dog class will be used to store the properties of a dog, such as the breed and name.
The steps for creating such a program in Java are outlined below:
Java Program:
1. Dog Class:
class Dog{int age;String name;public
void bark(){System.out.println("Woof");}}
2. Test Drive Class:
class Kennel{public static void main(String args[]){Dog myDog = new Dog();
myDog.age = 3;myDog.name = "Rusty";myDog.bark();}}
The Dog class has two instance variables, age and name.
The bark() method prints Woof to the console.
The Kennel class has a main() method that creates a Dog object and calls its bark() method.
Here is a Java program containing two classes Dog and a test drive class Kennel that has your main method.
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indicate to which category the characteristic of the ip protocol belongs. you will only type the alphacharacter in the canvas textbox. category a. connectionless b. best-effort delivery c. media independent
The characteristic of the IP Protocol belongs to category A, Connectionless.
Connectionless means that each packet is transmitted independently and can take any path to reach the destination. This type of service is unreliable as there is no guarantee that all packets will reach the destination in the same order they were sent. Additionally, no handshaking is done between the source and destination which means that there is no end-to-end communication control.
IP Protocol is designed to provide a best-effort delivery, meaning that the network does not take responsibility for packet delivery. The responsibility lies with the sender to ensure the successful delivery of the packet, however, the network will try to send the packet. The packets may be reordered or dropped by the network and there is no guarantee that the packet will reach its destination.
IP Protocol is also media independent, meaning that it is capable of running on different physical layer technologies such as Ethernet, WiFi, or cellular. The IP layer handles any conversion needed to communicate between different physical media. This makes it possible to communicate over different media types.
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open the taskmasterlist table in datasheet view. what field contains redundant data that most likely could be pulled into a lookup table?
The field that contains redundant data that most likely could be pulled into a lookup table in the taskmasterlist table in datasheet view is the "Category" field.
What is a taskmasterlist?A taskmasterlist is a list of all the different tasks and their associated deadlines that an individual has to complete. The taskmasterlist is a tool that is commonly used to help people stay organized and keep track of their various obligations. The taskmasterlist usually includes the task name, due date, and priority level, among other things.What is a datasheet?A datasheet is a table that displays data in rows and columns. The datasheet is a common method for displaying data in computer programs such as Microsoft Excel and Microsoft Access. The datasheet is a flexible and customizable tool that allows users to view, sort, filter, and edit data in various ways.What is a redundant data?Redundant data is data that is repeated unnecessarily in a dataset. Redundant data can occur when data is duplicated in different fields, tables, or databases. Redundant data can cause a variety of problems, including increased storage requirements, slower data processing, and data inconsistency. Therefore, it is usually best to eliminate redundant data whenever possible.What is a lookup table?A lookup table is a table that is used to store data that is shared by multiple tables. A lookup table usually consists of two fields: a unique identifier field and a descriptive field. The unique identifier field is used to link the lookup table to other tables, and the descriptive field is used to store the actual data that is being looked up. A lookup table can be a useful tool for reducing data redundancy and improving data consistency.
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you install a virtual machine app such as vmware or virtual box. however, when you try to create a virtual machine, they system issues a message implying that virtualization is not supported. how/where could you potentially fix the problem?
If you receive a message indicating that virtualization is not supported when trying to create a virtual machine using an application such as VMware or VirtualBox, it is possible that virtualization is not enabled in the computer's BIOS or UEFI firmware settings.
To enable virtualization, you can follow these general steps:
Restart your computer and enter the BIOS or UEFI firmware settings by pressing the key indicated during boot (often F2, F10, or Del).Look for a setting related to virtualization or hardware-assisted virtualization (such as Intel VT-x or AMD-V). This setting may be located in different menus depending on the motherboard or firmware manufacturer.Enable the virtualization setting and save the changes.Restart your computer and try creating the virtual machine again.If virtualization is not available in your BIOS or UEFI firmware settings, it is possible that your processor or motherboard does not support virtualization. In this case, you may need to upgrade your hardware or use a different virtualization solution that does not require hardware virtualization support.
Note that the specific steps to enable virtualization may vary depending on your computer's hardware and firmware. It is recommended to consult the manufacturer's documentation or support resources for more information on enabling virtualization on your specific system.
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which directory would a user jsmith look in to modify the scripts that are run specifically related to their login? a./home/jsmith/ b./etc/users/ c./usr/local/homes/ d./etc/rc.0/
The directory where a user jsmith can look in to modify the scripts that are run specifically related to their login is a. /home/jsmith/.
Explanation: The directories are also known as folders in the computer system. They help in organizing the files and data in the computer system. A directory may contain files or subdirectories.
Every file in a computer system is part of a directory. Every operating system like Windows, Mac, and Linux has its own way of organizing the files and directories in the computer system.
In the question, we are asked about the directory where a user jsmith can look in to modify the scripts that are run specifically related to their login.
The options given are:
a. /home/jsmith/
b. /etc/users/
c. /usr/local/homes/
d. /etc/rc.0/
The directory where a user jsmith can look in to modify the scripts that are run specifically related to their login is /home/jsmith/.
The /home directory contains all the users' home directories. It is a personal directory of every user. Every user has a separate directory inside the /home directory. These directories have the name of the user as its name.
So, the directory of the user jsmith would be /home/jsmith/.
The script is a file that contains a list of commands that the computer will run in sequence. The scripts can be written in any programming language. The scripts that are run specifically related to the login of a user can be modified in the home directory of that user, which in this case is /home/jsmith/.Thus, option a./home/jsmith/ is the correct answer.
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If you copy a drawing from the Internet and use it in a report, you might be violating the artist's _____.
If you copy a drawing from the Internet and use it in a report, you might be violating the artist's copyright.
Copyright is a type of intellectual property protection that grants the owner the exclusive right to make copies of their work, distribute it, or use it for commercial purposes. It applies to a variety of creative works, including music, literature, art, and software.
However, the artist's works are still protected by copyright, even though they have been published on the internet. The internet, on the other hand, has made copyright infringement more common by making it easier to copy and distribute information. Therefore, copying a drawing from the Internet and using it in a report without the artist's permission is a copyright infringement or violation, and it is unethical and illegal.
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the description of a particular resource using the rules and attributes specified in the metadata schema and content standards is known as: group of answer choices
The description of a particular resource using the rules and attributes specified in the metadata schema and content standards is known as A. Metadata record.
A metadata record provides structured information about the resource to make it easier for users to discover, understand, and access it. Metadata records can describe various types of resources, such as books, articles, images, or websites. Metadata elements are the individual components within a metadata record. They represent specific types of information, such as the title, author, or publication date. These elements are defined by metadata schemas, which provide a consistent structure and set of rules for creating metadata records.
Content standards provide guidelines on how to represent and format the information within metadata elements, ensuring consistency across different resources and organizations. Ontology schemas, on the other hand, are more focused on defining relationships between concepts and entities within a particular domain. They are used in semantic web and linked data applications to create a shared understanding of the meaning of terms and their relationships. Therefore, the correct option is A.
The question was incomplete, Find the full content below:
the description of a particular resource using the rules and attributes specified in the metadata schema and content standards is known as a group of answer choices
A. Metadata record
B. Metadata elements
C. Content standards
D. Ontology schemas
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characters that display on the screen to show the location of paragraphs, tabs, and spaces, but that do not print, are called:
The characters that display on the screen to show the location of paragraphs, tabs, and spaces, but that do not print, are called formatting marks.
These marks are also known as nonprinting characters. Nonprinting characters are characters that are not printed when a file is printed. These characters include tabs, line breaks, spaces, and other formatting codes used to create white space and adjust the layout of a document.
These characters are often hidden by default but can be revealed by turning on the display of formatting marks in a word processor. Formatting marks aid in the organization and presentation of the text. They can be used to indicate spacing, paragraph breaks, tabs, and other layout aspects of a document.
Formatting marks are used to aid in the production of consistent, legible documents. Additionally, formatting marks can be used to troubleshoot formatting issues and identify potential issues with the document layout.
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what command on windows will display a listing of all open netork connections on a computer and, with additional parameters, will aslo provide the corresponding process number that is instantiating the connection? tracert netstat ifconfig chmod
Answer:
netstat
Explanation:
The netstat command shows a list of all active connections as well as the corresponding process number.
select incorrect about big data, which is defined in the class at the system level, not data level. a. it can store a large scale data and process it in sequentially b. it uses non-expensive server c. distributed parallel systems d. the popular big data platforms are hadoop and spark
The incorrect statement about Big Data, which is defined at the system level, not data level, is "it uses non-expensive server". Big Data typically requires powerful and expensive servers to store and process the large amounts of data. The popular Big Data platforms are Hadoop and Spark.
Big data refers to extremely large and complex data sets that cannot be easily managed, processed, or analyzed using traditional data processing methods or tools. These data sets are typically characterized by the 3 Vs: volume, velocity, and variety. Volume refers to the large amounts of data that are generated and collected from various sources such as social media, sensor networks, financial transactions, and other digital platforms. Velocity refers to the speed at which this data is generated, processed, and analyzed. Variety refers to the different types and formats of data that are generated and collected, including structured, semi-structured, and unstructured data.
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if a variable called user id refers to the string 'aeinstein12', what is the result of the expression user id.isalpha()?
If a variable called user id refers to the string 'aeinstein12', the result of the expression 'user id.isalpha()' is False.
This is because the variable 'user id' is referring to the string 'aeinstein12', which is composed of a combination of letters and numbers. Therefore, it is not an alphabetic string. The isalpha() method is used to check if all the characters in a string are alphabetic (a-z) characters. If a string contains any non-alphabetic characters, the isalpha() method will return False.
For example:
a photographer stores digital photographs on her computer. in this case the photographs are considered the data. each photograph also includes multiple pieces of metadata including:
Based on the metadata provided, a photographer cannot D. filter photos to those taken with her favorite camera
The metadata only includes the date, time, and location the photograph was taken, and does not provide any information about which camera was used. If the photographer wanted to filter photos taken with her favorite camera, she would need to include this data in the metadata when she initially stores the photographs on her computer.
Metadata is data that is included with digital photographs and other digital media. It is used to provide information about the media, such as the date and time the photo was taken, the location the photo was taken, and which device was used to take the photo. By including this data in the metadata, photographers can easily search and filter their photographs.
In order to filter her photos to those taken with her favorite camera, the photographer would need to include this information in the metadata when she initially stores the photographs on her computer. This would allow her to easily filter her photos and find those taken with her favorite camera.
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The question is incomplete but probably the full question is:
A photographer stores digital photographs on her computer. In this case the photographs are considered the data. Each photograph also includes multiple pieces of metadata including:
Date: The date the photograph was taken
Time: The time the photograph was taken
Location: The location where the photograph was taken
Device: Which camera the photo was taken with
Which of the following could the photographer NOT do based on this metadata?
A. Filter photos to those taken in the last week
B. Filter photos to those taken in a particular country
C. Filter photos to those taken of buildings
D. Filter photos to those taken with her favorite camera
lisa is shopping for a pc that she can take with her to school. she would like a portable pc with a usb port so that she can plug in external devices. which computer fits lisa's computer needs? select your answer, then click done.
Lisa's computer needs can be met by purchasing a laptop with a USB port. This type of computer is portable and can be taken with her to school, and the USB port will allow her to plug in external devices such as a keyboard, mouse, external hard drive, etc.
When shopping for a laptop, it is important to consider the type of processor, RAM, storage, and display. Processors can range from the budget-friendly Celeron and Pentium to the more powerful Core i3, i5, and i7 models. RAM and storage size will vary by model, but it is important to get enough RAM to handle multitasking and enough storage space to store documents, photos, music, and videos.
When considering the display, a larger display will make it easier to see what is on the screen, but it will also make the laptop heavier and more difficult to transport. It is also important to consider the brand and quality of the laptop, as well as warranty and customer service options.
In addition, there are many accessories that can be purchased to enhance the laptop's performance and usability, such as a carrying case, mouse, external hard drive, and more. Other options including Supercomputer, personal computer, and microcomputer are incorrect. The best type of computer containing all desired features is Laptop.
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what version number of ftp is vulnerable to the smiley face backdoor?
The Smiley Face backdoor was a security vulnerability that existed in some versions of the FTP (File Transfer Protocol) software. Specifically, it affected versions of the WU-FTPD server software prior to version 2.6.0.
The Smiley Face backdoor allowed remote attackers to gain unauthorized access to an FTP server by including certain smiley face characters in the FTP username. When a user with a smiley face in their username connected to the vulnerable server, the backdoor would execute arbitrary commands with the privileges of the FTP server.
Therefore, it is not a specific version number of FTP that is vulnerable to the Smiley Face backdoor, but rather a specific version of the WU-FTPD server software. The vulnerability was fixed in version 2.6.0 of the software, so any version prior to that is potentially vulnerable.
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which of the following compiler parameter will determine the code optimization techniques used? a. plsql ccflags b. plsql code type c. plsql optimize level d. plsql optimizer
A compiler is a program that converts high-level programming languages into machine language, which can be executed by computers.
The source code is compiled into an executable file or an object file by the compiler. A compiler is used to produce high-quality code for a specific CPU architecture, which is optimized for performance and efficiency. Optimization in the context of a compiler is the process of transforming code to make it more efficient, faster, or use fewer resources. It is a set of techniques used to make a program run more quickly, with fewer resources or the same resources. A compiler can optimize code by modifying the code's structure, using specialized instructions or algorithms, or eliminating redundant code.Compiler parameters that will determine the code optimization techniques usedThe PL/SQL compiler has a variety of optimization options that can be used to enhance the performance of code. The PL/SQL optimizer is one such option. Plsql optimize level is a compiler parameter that specifies the optimization level used by the compiler to produce optimized code.
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cloud native applications follow a consistent set of development principles. identify two of these development principles from the provided options. 1 point tightly couple the different functions of the application so that they can work together as a whole bring the various single-function components of an application into one huge piece of software break applications down to single-function microservices containerize the microservices for maximum flexibility, scalability, and portability
Cloud-native applications follow a consistent set of development principles.
Two of these development principles are; to break applications down to single-function microservices and to containerize the microservices for maximum flexibility, scalability, and portability.
What are cloud-native applications? Cloud-native is a term used to describe an approach to building and running applications that are designed to take full advantage of the cloud computing delivery model. Cloud-native applications are often broken down into smaller, independent units referred to as microservices.
Containerization technologies, like Docker and Kubernetes, are used to enable microservices to be more easily deployed and managed.What is microservices? Microservices are small, independent, and loosely coupled services that perform a single function.
The idea behind microservices is to break an application down into smaller pieces that can be independently developed, deployed, and scaled. By breaking down an application into smaller, independent units, it becomes easier to develop, deploy, and manage. Microservices enable applications to be more modular, flexible, and scalable.
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when removing a node from a chain, what case should we consider? group of answer choices the node is at the end of the chain the node is at the beginning of the chain both of them none of them
When removing a node from a chain, we should consider both cases: if the node is at the beginning of the chain or if the node is at the end of the chain.
If the node is at the beginning of the chain, we need to update the reference to the head of the chain to the next node, and if the node is at the end of the chain, we need to update the reference to the tail of the chain to the previous node.
If the chain has only one node, removing it would result in an empty chain, so it's also important to consider this case and update the reference to the head and tail to null.
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what is operating system? group of answer choices d) all of the mentioned a) collection of programs that manages hardware resources c) link to interface the hardware and application programs b) system service provider to the application programs
Operating System (OS) is a collection of programs that controls and manages hardware resources. The operating system serves as a connection between the computer's hardware and application software. The correct option is A) a collection of programs that manages hardware resources.
The Operating System is system software that manages hardware and software resources and provides frequent services to the user. The operating system acts as a connection between computer software and hardware by allocating the system's hardware resources to the user software.
Features of the Operating System are:
Process ManagementMemory ManagementFile ManagementDevice ManagementSecurityControl of network connectivityResource ManagementMulti-TaskingMulti-UserThe operating system allocates the resources and performs necessary tasks. It also enables users to use the computer efficiently.
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The _____ data model uses the concept of inheritance.a. relational b. networkc. object-oriented d. entity relationship
The object-oriented data model uses the concept of inheritance. The correct answer is Option C.
What is a data model?A data model is a graphical or mathematical representation of an organization's data, software architecture, or business systems. It is a description of how data is represented and accessed in a database management system. A data model's primary goal is to represent the data effectively and simply while maintaining data integrity. A data model is used to describe how data is represented and accessed in a database management system. The object-oriented data model uses the concept of inheritance.
Inheritance is a concept that allows the developer to define a new class based on an existing class. The new class is referred to as a derived class or subclass, whereas the existing class is referred to as the base class or superclass. A subclass inherits all of the characteristics of its parent class, allowing the developer to reuse existing code to create new objects that are similar to existing ones. A relational data model is based on relational algebra and is used to represent data in a table format. A network data model is used to represent complex data relationships, such as those found in a corporate network. An entity-relationship model is used to model the relationships between entities in a database.
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A company that provides internet access to customers for a fee
A.)URL
B.)ISP
C.)HTTP
Answer:
ISP
Explanation:
ISP is a company that provides Internet access to its customers.
URL is the address of a website
HTTP is communication between web browsers and web servers
if you are experiencing slow performance on a system and think that the ssd hard drive is the problem, you can run defrag and optimization. what does defrag do with the data on an ssd hard drive?
It issues a retrim command to clear out all blocks that contain useless material.
How does SSD differ from a hard drive?A new type of computer storage component is the solid-state drive (SSD). Faster than the conventional hard discs they have replaced, SSDs store data using flash-based memory. On a laptop or computer, SSDs are renowned for offering internal storage. A simple and portable method of storing all of your files is on external storage.SSDs are particularly dependable since they lack moving parts. In actuality, the majority of SSDs have a lifespan of over five years, while the longest-lasting models have a lifespan of over ten years. In contrast, how frequently you write data to your SSD will determine how long it will live, so you may use that information to predict its longevity.Therefore, the correct option is b) It sends a retrim command to erase all blocks that are filled with unused data.
The complete question is:
If you are experiencing slow performance on a system and think that the SSD hard drive is the problem, you can run Defrag and Optimization. What does Defrag do with the data on an SSD hard drive?
a. It rearranges fragments or parts of files in contiguous clusters.
b. It sends a retrim command to erase all blocks that are filled with unused data.
c. It rewrites the entire hard drive data.
d. It cleans all unnecessary data from the hard drive.
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a user typed in the command pwd and saw the output: /home/jim/sales/pending. how could that user navigate to the /home/jim directory? a. cd .. b. cd /jim c. cd ../.. d. cd ./.
The correct command to navigate to the /home/jim directory is cd /jim. Which is option (b).
When the command pwd is entered, it displays the present working directory. In this case, the user was in the directory /home/jim/sales/pending.
To navigate to the directory /home/jim, the user should use the command cd /jim.cd /jim navigates to the directory jim present inside the /home directory.
Hence, option B is correct.cd .. moves the user one directory up in the file system.
In this case, the user would be directed to the directory /home/jim/sales.cd ../.. moves the user two directories up in the file system.
In this case, the user would be directed to the directory /home/jim.cd ./ is used to navigate to the present working directory. In this case, the user would still be in the directory /home/jim/sales/pending.
The correct command to navigate to the /home/jim directory is cd /jim.
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