Mapping Cardinality Constraints (8') a. For a binary relationship set, commonly there are four types of mapping cardinality. Please list out these four types. (4') b. How to express these four types of mapping cardinality in the E-R diagram? Please use the E-R diagrams to illustrate. (4', Hint: draw four E-R diagrams, using the principal style you have learned in this course)
Answers
The four types of mapping cardinality for a binary relationship set are one-to-one (1:1), one-to-many (1:N), many-to-one (N:1), and many-to-many (N:M). These types can be expressed in an Entity-Relationship (E-R) diagram using different notations and cardinality indicators.
1. One-to-One (1:1):
In a one-to-one relationship, each entity in the first entity set is associated with at most one entity in the second entity set, and vice versa. In an E-R diagram, this can be represented by drawing a straight line connecting the two entities and placing the cardinality indicator "1" on both ends of the line.
2. One-to-Many (1:N):
In a one-to-many relationship, each entity in the first entity set can be associated with multiple entities in the second entity set, but each entity in the second entity set can be associated with at most one entity in the first entity set. In an E-R diagram, this can be represented by drawing a straight line from the first entity to the second entity and placing the cardinality indicator "1" on the side of the first entity and "N" on the side of the second entity.
3. Many-to-One (N:1):
In a many-to-one relationship, each entity in the first entity set can be associated with at most one entity in the second entity set, but each entity in the second entity set can be associated with multiple entities in the first entity set. In an E-R diagram, this can be represented by drawing a straight line from the second entity to the first entity and placing the cardinality indicator "N" on the side of the first entity and "1" on the side of the second entity.
4. Many-to-Many (N:M):
In a many-to-many relationship, each entity in the first entity set can be associated with multiple entities in the second entity set, and vice versa. In an E-R diagram, this can be represented by drawing a line connecting the two entities and placing the cardinality indicator "N" on both ends of the line.
By using these notations and cardinality indicators in an E-R diagram, the different types of mapping cardinality can be visually represented, providing a clear understanding of the relationships between entities in a database system.
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Related Questions
A que se refiere el texto cuando afirma que nadie puede decir" Jesus es el Señor! sino con el espiritu santo (1 corintios 12, 1-11
Answers
Answer:
creo que serefiere a que nadie puede desir que jesus es el senor si no cree en lo que el mismo dice es como mintiendo sobre ello
Explanation:
perdon si no es la respuesta no se esplicarlo muy bien
Can someone help me write a code in python to find the sum of all the odd numbers from 1-301.
In which python makes a list of all the odd numbers and uses a loop
Answers
arr = [] #an empty array
for i in range(302):
arr.append(i) if i%2 != 0 else None #add a new element, if its odd, else - nothing
print(sum(arr)) #printing the sum of elements
i am making a project i have to advertise a product i picked a futureistic car
can any one halp me with a unknown name that is cool plss
Answers
Answer:
The Futuristic Car. That name is bussin
size = input("Enter your shoe size: ") size = int(size) if size > 12: print(str(size) + " is too high.") elif size < 6: print(str(size) + " is too low.") else: print(str(size) + " is in stock.") What is the output from running the above code if the user enters ten?
Answers
Answer:
It will print that the shoe size is in stock when the user prints 10, too high when the user enters 12, and anything less than 6 would be too low. It's a python program describing how basic input data is interpreted.
Which type of inventory control is expensive but helps keep inventory especially secure? A. RFID tags B. Barcodes C. Visual merchandising D. CRM software Please select the best answer from the choices provided A B C D.
Answers
Answer:
a) RFID tags
Explanation:
yeah they're super expensive but keep everything secure so nothing gets in it .
Which communication device uses wireless data transmission? Select 4 options.
Answers
Answer:
Satellite Internet providers, Smart Speakers, Smartphones and Bluetooth headphones are all wireless data transmissions.
Explanation:
The transmission device that uses wireless data transmission are the smartphones, Bluetooth headphones, satellite internet providers and the smart speakers.
What is wireless data transmission?Wireless data transmission is the transfer of digital or analogue signals using radio spectrum through the atmosphere. It doesn't involve wire or cables.
The examples of devices that makes use of wireless data transmission include the following:
Smartphones, Bluetooth headphones, satellite internet providers and smart speakers.A typical example of a device that makes use of cable is the Ethernet. An Ethernet connection transmits data over cable.
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For computer forensics, ____________ is the task of collecting digital evidence from electronic media.
Answers
For computer forensics, data acquisition is the task of collecting digital evidence from electronic media.
What is data acquisition?Data acquisition is the process of gathering digital evidence from electronic media for computer forensics. Static acquisitions and live acquisitions are the two different categories of data acquisition.
You learn how to carry out static acquisitions from digital material in this chapter. It is the process of digitalization of data from the world.
Thus, data acquisition is the task of collecting digital evidence from electronic media.
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in
the term of cybersecurity
One of the important things for a forensics infestation is
preparation, why? provide details
Answers
1. Preservation of Evidence: Adequate preparation ensures the proper collection and preservation of digital evidence, which is essential for understanding the attack, identifying the source, and assessing the extent of the damage.
2. Legal and Regulatory Requirements: Preparation involves understanding the legal and regulatory obligations related to incident response and forensics investigations to ensure compliance during the investigation process.
3. Timely Response: Preparation allows organizations to have predefined incident response plans, protocols, and trained personnel in place, enabling a swift and effective response to cybersecurity incidents.
4. Forensics Tools and Expertise: Proper preparation involves acquiring and maintaining the necessary tools and expertise for digital evidence collection and analysis, ensuring accurate and insightful forensic analysis.
5. Documentation and Reporting: Preparation includes implementing standardized documentation practices to record the investigation process, which supports legal actions, audits, and reviews.
In summary, preparation in cybersecurity forensics investigations is vital for evidence preservation, legal compliance, timely response, utilization of proper tools and expertise, and accurate documentation, leading to effective resolution of cybersecurity incidents.
Which of the following items is the best list of items to bring to a job interview?
O copies of your resume, cellphone with contacts at the company, and a snack to share
copies of your academic work, written responses to interview questions, and a pen and paper to take notes
O copies of your cover letter, the contact information for your interviewer, and a voice recorder
O copies of your resume, the contact information for your interviewer and a pen and paper to take notes
Answers
Answer:
I am not exactly sure but I think it is:
D. Copies of your resume, the contact information for your interviewer and a pen and paper to take notes
Explanation:
Which sentence describes a contract comprehensively?
A contract needs to have an offer and a legal purpose. A contract includes an offer and acceptance without any consideration. A contract
includes an offer, acceptance, and consideration without a legal purpose. A contract includes an offer, acceptance, consideration, and a legal
purpose.
Answers
Answer:The sentence that describes a contract comprehensively is the last option - a contract includes an offer, acceptance, consideration, and a legal purpose.
These four terms are all very important parts of a contract, without which an agreement couldn't even exist. A contract has to have all four parts in order to be legally valid, so this is the reason why the other options cannot be correct as all of them lack one or more terms.
Explanation:
Answer:
A contract includes an offer, acceptance, and consideration without a legal purpose.
Explanation:
Which of the following is not a resource to find scholarship opportunities?
Answers
Answer:
B. school counselor
Hope it helps!!!brainliest pls!!!!!
The school counselor is not a resource to find scholarship opportunities. Thus option B is correct.
What is a scholarship?A scholarship is a form of financial aid that allows the student that comes from the weaker section to go for further advanced education. hey are awarded on the basis of various criteria and include academic merit, athletic skills, and financial needs.
Find out more information about the scholarship.
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What would the coordinates be of a 1x1x1 cube in a 3D space if the front lower-left corner is placed at (0,0,0) and the back top-right corner is placed at (1,1,1)?
Answers
Answer:
See picture.
Explanation:
The picture shows all the 8 coordinates.
does anybody have the answer to Exercise 2.5.7: Circle Pyramid for codehs python?
Answers
The Circle Pyramid for codehs python Yes, here is the solution.
What is the Pyramid ?The Pyramid is a monumental structure that is characterized by its triangular shape, typically with a flat base and four steep sides that meet at a point at the top. Pyramids have been built all over the world in many different cultures, including Ancient Egypt, Mesoamerica, and China. The most well-known pyramids are those of the ancient Egyptians, which were built as tombs for the Pharaohs and their families.
Yes, here is the solution:
from turtle import *
# Set up your screen and starting position.
setup(500,300)
setworldcoordinates(-250,-150,250,150)
penup()
home()
# Draw the pyramid
pendown()
for i in range(4):
circle(25,360)
left(90)
forward(50)
# Hide your turtle
hideturtle()
# Close window on click.
exitonclick()
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An expert system used on a medical website accepts an input illness from the user and produces a list of possible symptoms. What type of function is the interface engine performing?
A.
backward chaining
B.
production unit
C.
production rule
D.
forward chaining
E.
knowledge base
Answers
Answer:
The correct answer would be:
D.
forward chaining
#PLATOFAM
Have a nice day!
music sites through schools wifi 2020 What is one thing a person should do to stay safe when exercising? 100 pts.!
Answers
Answer:
They should stay away from others (keep workout short or at home)
always do The exercise right-properly
Explanation:
Answer:
they should stay at home and do workouts or they can start a fitness program in a safe area.
Which of the following is a classification of more than one modality implemented within a system
that provides several tools for both input and output and for human-computer interactions?
(1 point)
O unimodal
O multimodal
O array
O implementation
Item 1
Item 2
Item 3
Item 4
Item 5
Item 6
Item 7
Item 8
Answers
Some web hosting services will offer a(n) ____, which is helpful when analyzing who is coming to your site and which pages they are viewing.
Answers
Some web hosting services will offer a site traffic report, which is helpful when analyzing who is coming to your site and which pages they are viewing.
What is site traffic report?Analysts and marketers use website traffic to assess the performance of a website: the total number of website visitors, as well as information on where they came from and how they got to the site.
Network traffic analysis (NTA) is a technique for monitoring network availability and activity in order to detect anomalies such as security and operational problems.
NTA is commonly used in the following scenarios namely Creating a real-time and historical record of what's going on in your network.
Thus, the answer is site traffic report.
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Which device can relay packets from one network to another and is usually programmable?
Answers
The device can relay packets from one network to another and is usually programmable is known to be called Router.
What is a router used for?A router is known to be a kind of device that links two or more packet-switched networks as well as subnetworks.
Note that it is one that tends to serves some primary functions and as such, one can say that The device can relay packets from one network to another and is usually programmable is known to be called Router.
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Describe the major features of super computer
Answers
Answer:
large and operate at a high speed
Large quantities of FLOPS (Floating Point Operations)
A large high throughput filesystem
The software infrastructure needed to write and run codes that utilize the system
Significant power and cooling infrastructure
this is really a question about what this means. My friend is trying to code speed racer the video game and he doesn't know what this means. Before you ask yes the devs know about this and don't care. but here is this code 03 D0 5F 3A.
what does these codes mean?
Answers
It appears that the code "03 D0 5F 3A" is a hexadecimal representation of a series of bytes. Without more context, it is difficult to determine with certainty what this collection of bytes implies.
How is hexadecimal converted to bytes?You must first obtain the length of the supplied text and include it when constructing a new byte array in order to convert a hex string to a byte array. new byte[] val = str. length() / 2 new byte; Take a for loop now up till the byte array's length.
How can a byte array be converted to a hex byte array?Using a loop to go through each byte in the array and the String format() function, we can convert a byte array to a hex value. To print Hexadecimal (X) with two places (02), use%02X.
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Regarding the numbers used for keys..
A. at least one is not prime B. all are prime numbers C.none are prime
Answers
Answer:
A at least one is not prime
Explanation:
i just took the test on edge got it correct
Answer:
at lease one is not prime
Explanation:
got it right on edge thanks to person above me!
definition statement should include
Answers
Answer:c
Explanation:
true or false. From 2011 to 2018, ESPN lost 14 million cable tv subscribers, costing the company over a billion dollars annually.
Answers
Between 2011 and 2018, ESPN lost 14 million cable TV subscribers, which cost the company more than $1 billion annually---- True
What exactly is cable TV?Subscribers can get cable television service from a cable operator, which sends videos over coaxial or fiber optic cables. Programming delivered via satellite or other facilities without the use of a wire is not considered "cable television" in accordance with the Commission's standards.
Is it possible to use cable TV offline?Yes, your smart TV will function normally even without an internet connection. Using a cable box or an antenna, you will be able to connect speakers, Blu-ray/DVD players, and any other devices you like to watch TV and do other things. However, you won't be able to use any of the built-in video streaming apps.
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When looking to ensure your website is easily accessible by mobile users, what should you focus on doing first
Answers
Answer:
There are may steps in this procedure but there few steps that do first to access your mobile with your website.
Explanation:
When we are looking in our website and easily accessed by the mobile users, It is easy for them.
There are certain steps that should do first.
First step is that you have to redesign the website color schemeTo optimize your websiteTo create the mobile appNow to shorten the content in website.what is firewall and what techniques that firewall use to control access
Answers
A firewall is a type of security system that keeps track of and manages all network traffic according to pre-established security rules. It employs strategies including proxy servers, application gateways, circuit-level gateways, and packet filtering.
A firewall is a type of security system that keeps track of and manages incoming and outgoing network traffic in accordance with pre-established security rules. Typically, it is employed to safeguard a network against rogue users and applications. In order to restrict access, firewalls employ methods including packet filtering, application gateways, circuit-level gateways, and proxy servers. By blocking communication based on source and destination IP addresses, port numbers, and protocol, packet filtering is a technique. Application gates are used to give specific applications controlled access. Circuit-level gateways are used to monitor connections and decide whether to permit or reject traffic based on the connections' current condition. Last but not least, proxy servers are employed to function as an intermediate between a client and a server, enhancing security and preserving user privacy.
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Which statement is true?
A. A flowchart uses comments that can be kept as a permanent part of a program.
B. A comment line begins with #.
C. Pseudocode uses shapes such as rectangles and diamonds to plan a program.
D. You only use comments for pseudocode.
Answers
Answer:
B just took the test.
Explanation:
Answer:
comment line begin with #
Explanation:
What is internet?
What is network?
Difference between them?
Answers
Answer:
Network is defined as the group of two or more computer systems. Whereas internet is the interrelationship of a few networks.
The coverage of network is limited in comparison of internet.
Explanation:
Answer:
What is internet?The Internet is a vast network that connects computers all over the world. Through the Internet, people can share information and communicate from anywhere with an Internet connection.
What is network?A network consists of two or more computers that are linked in order to share resources (such as printers and CDs), exchange files, or allow electronic communications. The computers on a network may be linked through cables, telephone lines, radio waves, satellites, or infrared light beams.
What is internet?What is internet?What is network?Difference between them?Network is defined as the group of two or more computer systems. Whereas internet is the interrelationship of a few networks. 2. The coverage of network is limited in comparison of internet.
Explanation:
I hope this helps!Understand different customer types and analyze how customers make buying decisions.
Answers
There are several types of customers, such as individual consumers, businesses, government agencies, and non-profit organizations.
What are their characteristics?Each customer type has unique characteristics and factors that influence their buying decisions. Individual consumers often make buying decisions based on personal preferences, brand reputation, and price.
Businesses focus on the quality, cost, and reliability of products and services, as well as the potential return on investment.
Government agencies consider factors such as budget constraints, regulations, and the ability to meet specific needs.
Non-profit organizations often prioritize the impact and social responsibility of their purchasing decisions.
Ultimately, customers make buying decisions based on a combination of rational and emotional factors that align with their goals and values.
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List any two features of this computer
h. Who invented Electronic Discrete Variable Automatic Computer?
Answers
Answer:
John Mauchy 1. designed to be a stored-program computer 2. it was binary rather than decimal
Which office setup would be difficult to host on a LAN?
hardware.
RAM.
storage.
software.
Answers
The office setup would be difficult to host on a LAN is option C: storage.
What is the office LAN setup like?A local area network (LAN) is a network made up of a number of computers that are connected in a certain area. TCP/IP ethernet or Wi-Fi is used in a LAN to link the computers to one another. A LAN is typically only used by one particular establishment, like a school, office, group, or church.
Therefore, LANs are frequently used in offices to give internal staff members shared access to servers or printers that are linked to the network.
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