Thiết kế biểu đồ thực thể liên kết và tập lược đồ cơ sở dữ liệu quan hệ cho các bài toán quản lý sau:
Bài toán 1. Bạn cần một cơ sở dữ liệu để quản lý thông tin về các tạp chí. Với mỗi tạp chí bạn cần quản lí tên tạp chí, số ISSN (mã số công bố của tạp chí), số phát hành và năm phát hành. Dữ liệu về các bài báo trong tạp chí bao gồm: tiêu đề bài báo, trang bắt đầu và trang kết thúc của bài báo trong tạp chí (nghĩa là bài báo bắt đầu từ trang nào, và kết thúc ở trang nào trong tạp chí). Giả thiết rằng không có hai bài báo nào có cùng tiêu đề. Mỗi bài báo được viết bởi một vài tác giả. Mỗi tác giả bạn sẽ lưu các thông tin về tên, địa chỉ email và địa chỉ cơ quan.
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Answer:
sorry please write in English than i help.you i don't understand your language
Related Questions
Explain the concep of machine learning
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in most operating systems what is running application called?
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Answer:
I believe it is just a task. Since there exists(on windows) the Task Manager application, where you can stop any running task, I think that they are called tasks
Explanation:
In most operating systems, a running application is typically referred to as a process. A process is an instance of a program that is being executed by the operating system. It represents the execution of a set of instructions and includes the program code, data, and resources required for its execution.
Each process has its own virtual address space, which contains the program's code, variables, and dynamically allocated memory. The operating system manages and schedules these processes, allocating system resources such as CPU time, memory, and input/output devices to ensure their proper execution.
The operating system provides various mechanisms to manage processes, such as process creation, termination, scheduling, and inter-process communication.
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The value of the expression X(X+Y) is X
O a. True
b. False
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sorry I didn’t know this was Boolean math
I answered for regular math equations
similQuestion 2
I want to create an Excel workbook to keep track of my spending by month for the year, what would be the best names to give my worksheets?
1 point
Budget1, Budget2, Budget3
Spend1, Spend2, Spend3
June, July, August
Sheet1, Sheet2, Sheet3ar meaning in stability
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The best names to give the worksheets for spending by month for the year will be June, July, August. The correct option is C.
What is a workbook?A worksheet is a single page in a file created with an electronic spreadsheet tool such as Microsoft Excel or Sheets. A workbook is an Excel file that contains one or more worksheets.
A workbook is an Excel file that, like pages in a book, contains different sheets called worksheets.
To save a workbook, it must have at least one sheet. Excel is a set of work sheets (Sheet 1, Sheet 2, etc) Workbook is a collection of worksheets.
Because they are planning monthly spending, it is best to keep the file name as month name for convenience.
Thus, the correct option is C.
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To create a manual metric draft you should use: A. The architect scale B. The engineer scale C. The metric 1:100 scale
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Answer:
Option C, The metric scale
Explanation:
The metric scale is used to draft manual metric draft drawings. The metric scale is generally represented as 1:100
Architect scale is used for interior and exterior dimensions of structures and buildings
Engineer's scale is used for detail drawings of structures referred to as working plans
Hence, option C is correct
What was the Internet originally created to do? (select all that apply)
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The Internet was initially constituted for various purposes. it is was originally created to options a, c and d:
share researchcommunicateshare documentsWhat is InternetCommunication: The Internet was planned to aid ideas and data exchange 'tween analysts and chemists. It proposed to combine various calculating and networks to authorize logical ideas and cooperation.
Research and Development: The Internet's production was driven for one need to share research verdicts, experimental dossier, and possessions among academies, research organizations, and administration institutions.
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You have read about the beginnings of the Internet and how it was created. What was the Internet originally created to do? (select all that apply)
share research.
Play games.
Communicate.
Share documents.
Sell toys
the first part of your assignment is to complete the naive reconstruct function in hw3.py, which should take a string with no whitespace and return a reconstruction if possible, or none if not. your algorithm should run in o(nk), where k is the length of the longest word in the dictionary. this is provided as max word length. use the provided is valid function to check if a word is in the dictionary. this will ignore whitespace and leading / trailing punctuation.
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Here is an example implementation in Python for the naive reconstruct function:
def naive_reconstruct(string, max_word_length, is_valid):
for i in range(1, len(string) + 1):
word = string[:i]
if is_valid(word):
if i == len(string):
return [word]
tail_reconstruction = naive_reconstruct(string[i:], max_word_length, is_valid)
if tail_reconstruction:
return [word] + tail_reconstruction
return None
The function starts by looping through the input string and checking if substrings of length 1 to len(string) are valid words using the is_valid function.
If a valid word is found, the function will recursively call itself on the remaining part of the string, and if a reconstruction is possible, it will return a list of words including the found word and the words from the recursive call. If no reconstruction is possible, it will return None.
The running time of the function is O(nk), where n is the length of the input string and k is the length of the longest word in the dictionary.To know more about naive reconstruct, click on the link below:
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Press the
What are the two main parts to any VR experience?
A prototypes
B
screens
C code
D
hardware
E software
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The two main parts to any VR experience are:
SoftwareHardwareWhat hardware is used for virtual reality?There are different kinds of hardware. A common method to make or create any form of a realistic 3D depiction of a virtual world is to use a small computer monitor in front of all of the human eye.
Note that all the monitor shows is the perspective that is said to be matching or corresponding eye would be able to see in an actual environment.
Note that that kind of system is said to be called a binocular head-mounted display (HMD).
Therefore, based on the above, one can say that the two main parts to any VR experience are:
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Which strategies should be used to answer short answer or essay questions? Check all that apply
D comparing items
O looking tor key words such as 'compare" or "contrast
Oallowing extra time to answer
Oidentifying warning words such as "absolutes"
D checking the space for writing the answer
Answers
Answer:
B
Explanation:
correct me if im wrong
The strategies that should be used to answer short answer or essay questions are as follows:
Looking for keywords such as 'compare" or "contrast.Checking the space for writing the answer.Thus, the correct options for this question are B and D.
What do you mean by writing strategy?The writing strategy may be defined as the entire sequence in which a writer engages in planning, composing, revising, and other writing-related activities in any literary work. In their opinion, writing strategies are a sequence of activities instead of a single one.
There are five writing strategies for writing simply but authoritatively and effectively are as follows:
Use simpler words and phrases.Minimize the number of negatives in a sentence.Write shorter sentences, but avoid choppiness.Use important key terms consistently.Balance the use of simple and sophisticated language.Therefore, the correct options for this question are B and D.
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You decide that you want to run multiple operating systems on a single machine which of these will you need?
firmware
multitasker
hypervisor
0S switcher
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Answer:
Hyer-V = Hypervisor
Explanation:
g Which of the following factors primarily determines how the Internet is used in different countries? A. local attitude to information privacy B. local connection speeds C. extent of intercultural communication systems D. availability of personal computer parlors
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Answer: A. local attitude to information privacy.
Explanation:
The factor that primarily determines how the Internet is used in different countries is the local attitude to information privacy.
Information privacy simply means the relationship which exist between his data is collected and shared as week as the legal and political issues surrounding them.
It is used in different countries through a sim card in the trip, a mobile hotspot, or Wi-Fi for internet access.
Which of these vulnerabilities would you find in the device firmware attack surface area?
Inability to wipe device
Buffer Overflow
Interoperability Standards
Security-related function API exposure
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Interoperability Standards, Interoperability is the capacity of devices, programs, systems, or other items from several manufacturers to work in concert without the intervention of end users.
What is Interoperability?
The capacity of various systems, devices, applications, or products to connect and interact in a coordinated manner without needing any help from the end user is known as interoperability (pronounced IHN- tuhr -AHP- uhr -uh-BIHL- ih -tee).Greater timely sharing of important information is made possible by interoperability. The information from a patient's last-week blood test at his doctor's office can therefore be used today at the emergency room, saving time and money from performing additional (and unnecessary) tests at the hospital.Interoperability is the capacity of devices, programs, systems, or other items from several manufacturers to work in concert without the intervention of end users.To learn more about Interoperability refer to:
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which type of webpages will automatically adjust the size of the content to display appropriately relative to the size of the screen of the device on which it is displayed
Answers
Answer:
Responsive.
Explanation:
HTML is an acronym for hypertext markup language and it is a standard programming language which is used for designing, developing and creating web pages.
Generally, all HTML documents are divided into two (2) main parts; body and head. The head contains information such as version of HTML, title of a page, metadata, link to custom favicons and CSS etc. The body of the HTML document contains the contents or informations of a web page to be displayed.
The responsiveness of a webpage is an ability of the design to respond to the end user's digital device and screen size.
In Computer programming, a responsive web design makes it possible for various websites to change layouts in accordance with the user's digital device and screen size.
This ultimately implies that, a responsive design is a strategic approach which enables websites to display or render properly with respect to the digital device and screen size of the user.
Hence, responsive webpages will automatically adjust the size of the content to display appropriately relative to the size of the screen of the device on which it is displayed.
Because stderr and stdout represent the results of a command and stdin represents the input required for a command, only stderr and stdout can be redirected to/from a file. True or false?.
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It is a false statement that only stderr and stdout can be redirected to and from a file because they represent the result of a command and input required for a command respectively.
What is stdout?Its means standard output which is the text output of a command is stored in the stdout stream.
What is stdin?Its means standard input which is the text input of a command that is stored in the stdin stream.
What is stderr?Its means standard error which is an error message stored in the error stream whenever a command faces an error.
In conclusion, It is a false statement that only stderr and stdout can be redirected to and from a file.
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I have a channel called Moose In A Gaming Chair what should my first video be about?
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Answer:
An introduction about your self and what your channel will be about.
Explanation:
What online game do you play on the internet and can I play with you on it? I play downtown mafia 1960
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Answer:
crazygames.com
Explanation:
1.Create a function that accepts any number of numerical (int and
float) variables as positional arguments and returns the sum ofthose variables.
2.Modify the above function to accept a keyword argument
'multiplier'. Modify the function to return an additional variable
that is the product of the sum and the multiplier.
3.Modify the above function to accept an additional keyword
argument 'divisor'. Modify the function to return an additional
variable that is the quotient of the sum and the divisor.
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Answer:
This function accepts any number of numerical variables as positional arguments and returns their sum:
python
Copy code
def sum_numbers(*args):
return sum(args)
This function accepts a multiplier keyword argument and returns the product of the sum and the multiplier:
python
Copy code
def sum_numbers(*args, multiplier=1):
total_sum = sum(args)
return total_sum * multiplier
This function accepts an additional divisor keyword argument and returns the quotient of the sum and the divisor:
python
Copy code
def sum_numbers(*args, multiplier=1, divisor=1):
total_sum = sum(args)
return total_sum * multiplier, total_sum / divisor
You can call these functions with any number of numerical arguments and specify the multiplier and divisor keyword arguments as needed. Here are some examples:
python
# Example 1
print(sum_numbers(1, 2, 3)) # Output: 6
# Example 2
print(sum_numbers(1, 2, 3, multiplier=2)) # Output: 12
# Example 3
print(sum_numbers(1, 2, 3, multiplier=2, divisor=4)) # Output: (8, 3.0)
which of the following is not true? an algorithm allows ambiguity. an algorithm, when carried out, must eventually stop. an algorithm, can be carried out by a human being
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The one that is not true: An algorithm allows ambiguity.
An algorithm is a set of instructions that must be followed precisely, without any ambiguity, in order to produce the desired result.
An algorithm is a set of precise instructions used to solve a problem or complete a task. It must be followed exactly in order to produce the desired results. An algorithm can be carried out either through a computer program or by a human being. The algorithm should be formulated in such a way that it is unambiguous and ensures that all steps are clear and complete. The algorithm should also be designed so that it has a definite end point, otherwise it could run indefinitely without reaching a solution. Algorithms are essential for solving complex problems, as they provide an unambiguous, repeatable way to reach a solution.
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How did early computing device such as Charles Babbage's analytical engine and Ada Lovelace's contributions set the foundation for modern computing
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Early computing devices, such as Charles Babbage's Analytical Engine and Ada Lovelace's contributions, played a crucial role in setting the foundation for modern computing. Here's how their work contributed to computing development:
1. Charles Babbage's Analytical Engine: Babbage designed the Analytical Engine, a mechanical general-purpose computer concept, in the 19th century. Although the Analytical Engine was never fully built, its design and principles laid the groundwork for modern computers. Key features of the analytical engine include:
a. Stored Program: Babbage's Analytical Engine introduced the concept of storing instructions and data in memory, allowing complex calculations and tasks.
b. Control Flow: The Analytical Engine could make decisions and perform conditional operations based on previous computations, resembling the modern concept of control flow in programming.
c. Loops: Babbage's design incorporated looping mechanisms, enabling repetitive instruction execution, similar to modern programming languages.
2. Ada Lovelace's Contributions: Ada Lovelace, an English mathematician, collaborated with Charles Babbage and made significant contributions to computing. Her work on Babbage's Analytical Engine included writing the first algorithm intended for machine implementation. Lovelace realized the potential of the analytical engine beyond numerical calculations and recognized its capability for processing symbols and creating complex algorithms. Her insights laid the foundation for computer programming and algorithms.
Lovelace's ideas about the analytical engine extended beyond what was initially envisioned. He stressed the importance of machines handling more than just numbers. Her contributions demonstrated computers' potential to perform tasks beyond basic calculations and numerical processing.
Collectively, Babbage's analytical engine and Lovelace's contributions provided early conceptual frameworks for modern computing. Their ideas influenced subsequent pioneers in the field, and the concepts they introduced paved the way for the development of the digital computers we use today.
3
Drag each label to the correct location on the image.
An organization has decided to initiate a business project. The project management team needs to prepare the project proposal and business
justification documents. Help the management team match the purpose and content of the documents.
contains high-level details
of the proposed project
contains a preliminary timeline
of the project
helps to determine the project type,
scope, time, cost, and classification
helps to determine whether the
project needs meets business
needs
contains cost estimates,
project requirements, and risks
helps to determine the stakeholders
relevant to the project
Project proposal
Business justification
Answers
Here's the correct match for the purpose and content of the documents:
The Correct Matching of the documentsProject proposal: contains high-level details of the proposed project, contains a preliminary timeline of the project, helps to determine the project type, scope, time, cost, and classification, helps to determine the stakeholders relevant to the project.
Business justification: helps to determine whether the project needs meet business needs, contains cost estimates, project requirements, and risks.
Please note that the purpose and content of these documents may vary depending on the organization and specific project. However, this is a general guideline for matching the labels to the documents.
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A ____________chart plots the data in concentric circles.
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Need help asap
give the correct answer!!
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Answer:
C
Explanation:
Coding provides the robot directions, or instructions of what to do.
How could you use a spreadsheet you didn't like to simplify access also the problem
Answers
Explanation:
......
Name a wireless technology tat may work with one device and not another?
Answers
Answer:
WPAN/Bluetooth, Coexistence, High Rate WPAN, Low Rate WPAN, mesh Networking, Body Area Networks, and Visible Light Communication.
Conditionals often run on {} instructions.
A
if / else
B
if / then
C
unless / until
D
up to / at least
Answers
Answer: A
Explanation: This is a if/else Statement
In any programming language, the code has to make decisions and carry out actions depending on different inputs.
A standard method for labeling digital files is called a file-labeling what? Question 5 options: protocol tool setting configuration
Answers
Answer:What is the file-labeling protocol (standard method for labeling files)--protocol
Explanation:
(17) The solution to the LP Relaxation of a maximization integer linear program provides a(n) a. upper bound for the value of the objective function. b. lower bound for the value of the objective function. c. upper bound for the value of the decision variables. d. lower bound for the value of the decision variables.
Answers
Answer:
,.................xd
data privacy may not be applicable in which scenarios?
1. an app targeted at children for entertainment
2.a platform developed purely for knowledge exchangewith no motive of financial incentive
3.a platform being hosted in a country with no dp laws but targeted at data subjects from a country with stringent DP laws
4.a website for disseminating knowledge and that allows anonymous access
Answers
Data privacy may not be appropriate within the following scenarios:
An app focused on children for amusement: Whereas information security is vital, uncommon controls such as the Children's Online Protection Security Act (COPPA) might apply instep.A stage created absolutely for information trade with no rationale of monetary motivation: As long as individual information isn't collected or prepared, information protection may not be specifically appropriate.A stage being facilitated in a nation with no information protection laws but focused on information subjects from a nation with rigid information protection laws: The stage ought to comply with the information security laws of the focused country, regardless of the facilitating area.Web site for spreading information and permitting mysterious get to In case no individual information is collected or connected to the clients, information security may not be specifically pertinent, but other contemplations like site security ought to still be tended to.In situation 1, particular directions like COPPA may administer data privacy for children.
In situation 3, compliance with the focus on the country's data privacy laws is fundamental notwithstanding of facilitating area.
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A security team has downloaded a public database of the largest collection of password dumps on the Internet. This collection contains the cleartext credentials of every major breach for the last four years. The security team pulls and compares users' credentials to the database and discovers that more than 30% of the users were still using passwords discovered in this list. Which of the following would be the BEST combination to reduce the risks discovered?
a. Password length, password encryption, password complexity
b. Password complexity least privilege, password reuse
c. Password reuse, password complexity, password expiration
d. Group policy, password history, password encryption
Answers
Answer:
a. Password length, password encryption, password complexity
Explanation:
Under this scenario, the best combination would be Password length, password encryption, password complexity. This is because the main security problem is with the user's passwords. Increasing the password length and password complexity makes it nearly impossible for individuals to simply guess the password and gain access, while also making it extremely difficult and time consuming for hackers to use software to discover the password as well. Password excryption would be an extra layer of security as it encrypts the password before storing it into the database, therefore preventing eavesdroppers from seeing the password and leaked info from being used without decryption.
Which are true of the Transmission Control Protocol (TCP)? Multiple answers: You can select more than one option A it supports full duplex communication B it has graceful connection shutdown C its connections are logical D its data is sent as a discrete messages E it is an end-to-end protocol
Answers
Answer:
A, B, C, D and E
Explanation:
Transmission Control protocol (TCP) is a protocol that describes how connections are made and maintained between devices in a network which will help applications in these devices communicate and transmit data.
The following are some of the features of TCP:
i. It supports full duplex communication: In other words, TCP allows for concurrent transmission of data in both directions.
ii. it has a graceful connection shutdown: TCP allows for graceful termination and closing of connection. This means that when there is no more data to be sent by any of the communicating devices, rather than just close connection from its end, it first informs the other device about its completion and asks if it's safe to close the connection. From there, if the other device then says it doesn't have any data to send either, they then reach a consensus to close the connection at their respective ends.
iii. Its connections are logical: TCP makes use of the reliability and flow control mechanisms which require that it initialize and maintain some status information for each stream of data. This status information containing sockets, sequence numbers and window sizes is called a logical connection.
iv. Data is sent as discrete messages: Like other discrete messages, the IP treats the data in TCP as discrete messages by placing them into the IP datagram and transmitting to the target host.
v. It is an end-to-end protocol: TCP governs the way data is transmitted between two devices at their respective ends to ensure reliable delivery. In other words, it is responsible for the transmission of data from a source to one or more destinations. It sits on the operating system of the source and also on the operating system(s) of the destination(s).