please find out all the candidate keys and then choose the primary key. (the primary key could be a composite key)
Answers
Candidate Key: In a table, a candidate key is a basic set of keys that can be used to uniquely identify any table row of data.
What is primary key in DBMS? Super, Primary, Candidate, Alternate, Foreign, Compound, Composite, and Surrogate Key are the eight different types of keys in DBMS. A super key is a collection of one or more keys that uniquely identify the rows in a database.Candidate Key: In a table, a candidate key is a basic set of keys that can be used to uniquely identify any table row of data. Primary Key: The primary key is chosen from among the candidate keys and serves as the table's identification key. It can identify any data row in the table in a unique way.The column or columns that each row in a table uses to uniquely identify itself is known as the primary key.To learn more about super key refer,
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Related Questions
Question 5 of 10
In the MakeCode micro:bit reaction speed test program, what is the first step
in testing a user's reaction speed?
OA. Prompt the user to press the "A" button.
B. Have users fill out a survey.
C. Download the reaction speed data from previous tests.
D. Set up events and create a function.
Answers
In the MakeCode micro:bit reaction speed test program, the first step in testing a user's reaction speed is: A. Prompt the user to press the "A" button.
What is the MakeCode micro:bit?The MakeCode micro:bit can be defined as a programming software that is designed and developed by Microsoft Inc., in order to enable the measurement of a student’s reaction time and speed in completing a circuit path on a cardboard pad.
Additionally, the reaction time and speed of a student can be measured in both an undistracted and a distracted environment.
In order to take the measurement of a user's reaction speed, the first step is to prompt him or her to press the "A" button because it is designed and developed to test the reaction time of the computing system. Consequently, the computing system respond to the human interaction, as well as the reaction speed.
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Array Basics pls help
Answers
Answer:
import java.util.Random;
class Main {
static int[] createRandomArray(int nrElements) {
Random rd = new Random();
int[] arr = new int[nrElements];
for (int i = 0; i < arr.length; i++) {
arr[i] = rd.nextInt(1000);
}
return arr;
}
static void printArray(int[] arr) {
for (int i = 0; i < arr.length; i++) {
System.out.println(arr[i]);
}
}
public static void main(String[] args) {
int[] arr = createRandomArray(5);
printArray(arr);
}
}
Explanation:
I've separated the array creation and print loop into separate class methods. They are marked as static, so you don't have to instantiate an object of this class type.
What is the data type of the following variable?
name = "John Doe"
Answers
In computer programming, a variable is a storage location that holds a value or an identifier. A data type determines the type of data that can be stored in a variable. The data type of the following variable, name = "John Doe" is a string data type.
In programming, a string is a sequence of characters that is enclosed in quotes. The string data type can store any textual data such as names, words, or sentences.The string data type is used in programming languages such as Java, Python, C++, and many others. In Python, the string data type is denoted by enclosing the value in either single or double quotes.
For instance, "Hello World" and 'Hello World' are both strings.In conclusion, the data type of the variable name is string. When declaring variables in programming, it is important to assign them the correct data type, as it determines the operations that can be performed on them.
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Write a void method printPowers which uses a while loop to print the the first three powers of 1 - 5 as shown below.
1 1 1
2 4 8
3 9 27
4 16 64
5 25 125
Answers
Answer:
class Main {
public static void main(String[] args) {
int n=1;
while(n<=5) {
int power = 1;
while(power <= 3) {
System.out.printf("%d ", (int) Math.pow(n,power));
power++;
}
System.out.println();
n++;
}
}
}
Explanation:
A for-loop would lead to simpler code i.m.o.
Write a C++ program which reads a given integer n and prints its twin
prime.
"A twin prime is a prime number that is either 2 less or 2 more than another prime
number" for example, either member of the twin prime pair (41, 43). In other
words, a twin prime is a prime that has a prime gap of two".
Sample Output:
Enter an integer:
11
Twin prime number of 11 is:
13
Answers
The C++ program that reads a given integer n and prints its twin prime is given below:
The Program#include <iostream>
#include <cmath>
using namespace std;
int main() {
const int num_primes = 10005;
bool primes[num_primes];
for (int i = 2; i != num_primes; ++i) {
primes[i] = true;
}
for (int i = 2; i != int(sqrt(num_primes)); ++i) {
if (primes[i]) {
for (int j = 2; i * j < num_primes; ++j) {
primes[i*j] = false;
}
}
}
int n;
cout << "Input an integer:\n";
cin >> n;
cout << "Twin primes are:\n";
for (int i = n; i - 2 >= 0; --i) {
if (primes[i] && primes[i-2]) {
cout << i-2 << " " << i << endl;
break;
}
}
return 0;
}
The OutputInput an integer:
Twin primes are:
11 13
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Why is it important in manufacturing to determine allowances? How do allowances relate to tolerance dimensioning?
Answers
Answer:
Sry I can’t really help you with this one
Explanation:
Hi!
i want to ask how to create this matrix A=[-4 2 1;2 -4 1;1 2 -4] using only eye ones and zeros .Thanks in advance!!
Answers
The matrix A=[-4 2 1;2 -4 1;1 2 -4] can be created by using the following code in Matlab/Octave:
A = -4*eye(3) + 2*(eye(3,3) - eye(3)) + (eye(3,3) - 2*eye(3))
Here, eye(3) creates an identity matrix of size 3x3 with ones on the diagonal and zeros elsewhere.
eye(3,3) - eye(3) creates a matrix of size 3x3 with ones on the off-diagonal and zeros on the diagonal.
eye(3,3) - 2*eye(3) creates a matrix of size 3x3 with -1 on the off-diagonal and zeros on the diagonal.
The code above uses the properties of the identity matrix and the properties of matrix addition and scalar multiplication to create the desired matrix A.
You can also create the matrix A by using following code:
A = [-4 2 1; 2 -4 1; 1 2 -4]
It is not necessary to create the matrix A using only ones and zeroes but this is one of the way to create this matrix.
4. Why do animals move from one place to another?
Answers
Answer:
Animal move from one place to another in search of food and protect themselves from their enemies.They also move to escape from the harsh climate. Animal move from one place to another in search of food,water and shelter.
Answer:
Animals move one place to another because he search food and shelter
a computer memory that acts as the main storage available to user for programs and data
Answers
Answer:
Primary storage. Primary storage (also known as main memory, internal memory, or prime memory), often referred to simply as memory, is the only one directly accessible to the CPU.
Which topic would be included within the discipline of information systems
Answers
, , , , , are only a few of the subjects covered within the study area of information systems. Business functional areas like business productivity tools, application programming and implementation, e-commerce, digital media production, data mining, and decision support are just a few examples of how information management addresses practical and theoretical issues related to gathering and analyzing information.
Telecommunications technology is the subject of communication and networking. Information systems is a branch of computer science that integrates the fields of economics and computer science to investigate various business models and the accompanying algorithmic methods for developing IT systems.
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Which rule should be followed to stay safe online?
Keep inappropriate messages private.
Avoid sharing photos with anyone online
Keep screen names private
Ask an adult for permission to download
Answers
Answer:
Avoid sharing photos with anyone online.
Explanation:
People can track you down. Its not worth to be kidnapped. Stay safe.
In order to stay safe while using the internet platform, one should avoid sharing photos online. Thus, option B is correct.
What is online safety?Online safety can be best described as the method by which an individual can stay away from the possible threats one might encounter during internet surfing.
Online safety is an important aspect that protects personal information, reputation, and content. One can stay safe and protect their personal data by not sharing photos and other content with an unfamiliar person or platform.
One can limit the sharing of personal information by using the safe browsing method and must be careful of the content like posts and photos they share on the internet websites.
Thus, avoiding photo sharing with anyone online can keep one safe and protected. So option B is correct.
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Select the correct answer from each drop-down menu.
How would you define the rule of thirds?
The rule of thirds is an important feature of
This rule suggests that you must
This is where you should place the
Reset
Next
portions of text or an image.
Answers
The rule of thirds is an important feature of composition in visual arts, such as photography, painting, and design.
This rule suggests that you must divide an image into nine equal parts by imagining two equally spaced horizontal lines and two equally spaced vertical lines. These lines create four intersection points, known as the power points or points of interest.
This rule emphasizes that you should place the key elements or points of interest in the image along these lines or at the intersection points. By doing so, the composition becomes more visually appealing and balanced. It adds dynamism and guides the viewer's eye through the image, creating a sense of harmony and interest.
The rule of thirds is based on the idea that placing the main subjects or focal points off-center creates a more visually pleasing and engaging composition compared to placing them at the center. It allows for more negative space and encourages the viewer to explore the entire image, rather than focusing solely on the center.
In photography, this rule can be applied to various elements, such as landscapes, portraits, and still life. For example, placing the horizon on one of the horizontal lines rather than in the center can create a more balanced and captivating composition. In portraits, aligning the subject's eyes or face along the vertical lines can enhance the overall visual impact.
In summary, the rule of thirds is a composition guideline that suggests dividing an image into nine equal parts and placing the key elements or points of interest along the lines or at the intersection points. It is a valuable technique used by visual artists to create visually pleasing and well-balanced compositions.
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what are bananas if they are brown
Answers
if banans are Brown there bad I think
Which of the following is not a form of technology?
A) computer
B) ketchup
C) pencil
D) umbrella
Answers
Answer:
ketchup because all of the others are objects with certain creative functions but ketchup is just K e t c h u p.
A well known answer yes u guessed ryt it’s “Ketchup”.
Horaayy felicitations to u
Now back to the question, according to the definition of “technology”:
“An equipment or machinery made by engineering or applied science/sciences is called technology”.
As u can c that ketchup is this certainly not a technology rather a recipe/food item etc.
Which component of an email gives the recipient an idea of the email’s purpose and urgency?
A.
signature
B.
salutation
C.
CC and BCC
D.
subject line
Answers
Answer:
subject line
Explanation:
it is a brief description of what the email subject is.
write principles of information technology
Answers
Here are some principles of information technology:
Data is a valuable resourceSecurity and privacyOther principles of information technologyData is a valuable resource: In information technology, data is considered a valuable resource that must be collected, stored, processed, and analyzed effectively to generate useful insights and support decision-making.
Security and privacy: Ensuring the security and privacy of data is essential in information technology. This includes protecting data from unauthorized access, theft, and manipulation.
Efficiency: Information technology is all about making processes more efficient. This includes automating tasks, reducing redundancy, and minimizing errors.
Interoperability: The ability for different systems to communicate and work together is essential in information technology. Interoperability ensures that data can be shared and used effectively between different systems.
Usability: Information technology systems should be designed with usability in mind. This means that they should be intuitive, easy to use, and accessible to all users.
Scalability: Information technology systems must be able to grow and expand to meet the changing needs of an organization. This includes the ability to handle larger amounts of data, more users, and increased functionality.
Innovation: Information technology is constantly evolving, and new technologies and solutions are emerging all the time. Keeping up with these changes and being open to innovation is essential in information technology.
Sustainability: Information technology has an impact on the environment, and sustainability must be considered when designing and implementing IT systems. This includes reducing energy consumption, minimizing waste, and using environmentally friendly materials.
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In this assignment, you are required to write a menu-driven Java program that allows the user to
add patients to a priority queue, display the next patient (and remove him/her from the queue),
show a list of all patients currently waiting for treatment, and exit the program. The program
should simulate the scheduling of patients in a clinic. Use the attached Patient class provided
along with this assignment.
Your program should schedule patients in the queue according to the emergency of their cases
from 1 to 5 (the higher the value, the higher the priority). If two patients have the same
emergency value, use their order of arrival to set their priority (the lower the order, the higher
the priority). It is up to you to have the Patient class implement either Comparable or
Comparator.
Create a class PatientManager that has an attribute named waitingList of the type
PriorityQueue and a public method, start(). When start is called, it
should display the following menu of choices to the user, and then ask the user to enter a choice
from 1 to 4:
Here is a description of each choice:
(1) Ask the user for the patient’s name and the emergency from 1 to 5 (1 = low, and 5 = lifeand-death). Your program should create an instance of Patient using the entered data
and add it to the priority queue. Note that your program should not ask the user for the
value of the patient’s order of arrival. Instead, it should use a counter that is automatically
incremented whenever a patient is added to the queue.
(2) Display the name of the next patient in the priority queue and remove him/her from the
queue.
(3) Display the full list of all patients that are still in the queue.
(4) End the program.
Make sure your PatientManager class is robust. It should not crash when a user enters
invalid value. Instead, it should display an error message followed by an action depending on
the type of error (see the sample run below).
Test your program by instantiating your PatientManager class in a main method and
calling the start method.
Note: Add more helper methods and attributes as needed to the PatientManager class.
Answers
A Java programme simulating patient scheduling in a clinic uses the Patient class. Users can display and remove the next patient, add patients to a priority queue based on the severity of emergency.
What does the Java data structure menu-driven programme mean?A Java programme that presents a menu and then requests input from the user to select an option from the menu is known as a menu-driven programme. The output is provided by the programme in accordance with the option the user has chosen.
What is an example of menu-driven software?You can access a variety of commands or options through the menu-driven user interface in the form of a list or menu that is displayed in full-screen, pop-up, pull-down, or drop-down modes.
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which of the following is a benefit of using a cloud storage option
Answers
so.. the answer is “ Cloud storage service provides the best platform for disaster recovery data. “!
hope this helps!!
what is super computer ? List out application area of super computer.
Answers
Explanation:
Common applications for supercomputers include testing mathematical models for complex physical phenomena or designs, such as climate and weather, the evolution of the cosmos, nuclear weapons and reactors, new chemical compounds (especially for pharmaceutical purposes), and cryptology.
OR
A supercomputer is a computer that performs at or near the highest operational rate for computers. Traditionally, supercomputers have been used for scientific and engineering applications that must handle massive databases, do a great amount of computation, or both.
How does an IPS filter a network?
By checking administrative rulesets
By analyzing traffic patterns
By checking incoming requests
By analyzing specific user groups
Answers
Answer:
All of the options correct, (Intrusion Prevention System) can use a combination of techniques to filter network traffic
Explanation:
By checking administrative rulesets: An IPS may use predefined rules or signatures, set by an administrator, to identify and block known attacks or malicious activity.By analyzing traffic patterns: An IPS may use machine learning or other techniques to analyze the patterns of network traffic in order to identify and block unusual or suspicious activity.By checking incoming requests: An IPS may examine each incoming network request and compare it against a set of rules or signatures to identify and block malicious traffic.By analyzing specific user groups: An IPS may also use information about specific user groups, such as which users or devices are on the network, to identify and block malicious activity.Part 1
Given 4 integers, output their product and their average, using integer arithmetic.
Ex: If the input is:
8 10 5 4
the output is:
1600 6
Note: Integer division discards the fraction. Hence the average of 8 10 5 4 is output as 6, not 6.75.
Note: The test cases include four very large input values whose product results in overflow. You do not need to do anything special, but just observe that the output does not represent the correct product (in fact, four positive numbers yield a negative output; wow).
Submit the above for grading. Your program will fail the last test cases (which is expected), until you complete part 2 below.
import java.util.Scanner;
public class LabProgram {
public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);
int num1;
int num2;
int num3;
int num4;
Answers
1,2,3,4 has a product of 24 and an average of 2. ignored fractional part 0.5.
How can we determine the average?Average The arithmetic mean is determined by adding a set of numbers, dividing by their count, and then taking the result. For instance, the result of 30 divided by 6 is 5, which is the mean for 2, 3, 3, 5, 7, & 10.
Do you mean average or percentage?In this example, you must first divide the total of the two percent by the total of the two large samples in order to determine the average % of the two percentages. The result of 95 split by 350 is 0.27. This decimal is then multiplied by 100 to obtain the average percentage.
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why am i not getting an option for ads anymore
Answers
Answer:
Ummmmm, because you created, and logged into your acc on Brainly, and now you don't have to deal with them........uh yea have a nice day.
Explanation:
Beth is a software developer who is focused on identifying early-stage interface problems. Beth addresses the dimension of usability known as __________.
Answers
The dimension of usability that is being addressed by Beth is known as efficiency.
The dimension of usability.In Usability Engineering, there are five (5) qualities of a usable product suggested by Jakob Nielsen and these include the following:
LearnabilityMemorabilityEfficiencyErrors (low rate, easy to recover)SatisfactionIn this scenario, we can infer and logically deduce that the dimension of usability that is being addressed by Beth is known as efficiency because she's focused on identifying early-stage interface problems in software.
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____must cooperate with each other to neutralize the global threat of information censorship. Select 3 options.
The media
The web brigade
Bot armies
Civil society
The private sector
Answers
The media must cooperate with each other to neutralize the global threat of information censorship. The correct option is the A.
What is the media?The media is the group that collect information about the world and then provide it to the public. It is the main medium to get information about what is going on in the world.
Thus, the correct option is A.
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Answer:
the private sector
civil society
the media
Explanation:
took the test
Which feature is used to change the appearance of all slides of a presentation at one go? A. ruler B. Slide Master C. slide layout D. placeholder E. Slide Sorter
Answers
The feature that is used to change the appearance of all slides of a presentation in one go is called the "Slide Master" (Option B)
What is the slide master and why is it important?Slide Master is a function in Microsoft PowerPoint that allows you to build slide templates. Slide Master has the ability to store slide layouts, including the background, color, fonts, effects, placement, and so on.
With Slide Master, you can alter any of the formatting for your presentation at once and it will be applied to all slides instantaneously; for example, you may change the font of the title or text, the kind of bullets used, add an image to the backdrop, add an image to every slide, and so on.
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Which four of the following are true about fair use?
Answers
D,C,B
Should be the correct answers. I'm not the best when it comes to copyright but I believe those are correct.
Match the feature to its function.
1. Normal View
provide rows of icons to perform different tasks
2. Notes View
displays thumbnails
3. Slide Pane
place where information for handouts can be added
4. Title Bar
provides filename and Minimize icon
5. Toolbars
working window of a presentation
Answers
The Matchup of the feature to its function are:
1. Normal view the place where creating and editing occurs .
2. Notes view an area in which information for handouts can be added.
3. Slide pane the place where the slide order can be changed.
4. Menu bar contains lists of commands used to create presentations
5. toolbars provide rows of icons to perform different tasks.
What is the normal view?Normal view is known to be the view that is seen or used in editing mode and this is where a person can work a lot of items so that they can create their slides.
Note that Normal view is one that shows slide thumbnails on the left, that is a large window that depicts the current slide, and also has a section that is often seen below the current slide.
The Matchup of the feature to its function are:
1. Normal view the place where creating and editing occurs .
2. Notes view an area in which information for handouts can be added.
3. Slide pane the place where the slide order can be changed.
4. Menu bar contains lists of commands used to create presentations
5. toolbars provide rows of icons to perform different tasks.
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Design a spreadsheet to compute the dollar amount in each of the next 10 years of an initial investment returning a constant annual interest rate. Interest is reinvested each year so that the amount returning interest grows. What is the dollar amount 6 years from now of $300 invested at 12% annual interest? Please round your answer to the nearest cent.
Answers
To calculate investment growth, use a spreadsheet to input investment details and apply interest rate formulas; for an initial $300 investment at 12% annual interest, 6 years later, the amount is $595.38.
To design a spreadsheet to compute the dollar amount in each of the next 10 years of an initial investment returning a constant annual interest rate, follow these steps:
Open a new spreadsheet and create a table with the following columns: Year, Beginning Balance, Annual Interest Rate, Annual Interest Earned, and Ending Balance.In the Year column, enter the values from 1 to 10, to represent the next 10 years.In the Beginning Balance column, enter the initial investment amount, which is $300 in this case.In the Annual Interest Rate column, enter the constant annual interest rate, which is 12% in this case.In the Annual Interest Earned column, use the formula "=Beginning Balance * Annual Interest Rate" to calculate the amount of interest earned each year. This formula multiplies the beginning balance by the annual interest rate.In the Ending Balance column, use the formula "=Beginning Balance + Annual Interest Earned" to calculate the ending balance for each year. This formula adds the beginning balance and the annual interest earned.Fill down the formulas in the Annual Interest Earned and Ending Balance columns to calculate these values for each year.To find the dollar amount 6 years from now of $300 invested at 12% annual interest, look at the Ending Balance for the year 6. In this case, the Ending Balance for year 6 is $595.38.Round the answer to the nearest cent, which is $595.38.Therefore, the dollar amount 6 years from now of $300 invested at 12% annual interest is $595.38 (rounded to the nearest cent).
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Someone help me with this
Answers
Answer:
(b) public String doMath(int value){
return " " + (value * 3);
}
Explanation:
Two of the answers doesn't even have a variable to pass into. In order, to return a String the return " " in b will do this. Therefore, I think the answer is b.
In Java, write multiple if statements: If carYear is before 1967, print "Probably has few safety features." (without quotes). If after 1970, print "Probably has head rests.". If after 1991, print "Probably has electronic stability control.". If after 2002, print "Probably has airbags.". End each phrase with period and newline. Ex: carYear = 1995 prints:
Probably has head rests.
Probably has anti-lock brakes.
import java.util.Scanner;
public class SafetyFeatures {
public static void main (String [] args) {
int carYear;
Scanner input = new Scanner(System.in);
carYear = input.nextInt();
/* Your code goes here */
}
}
Answers
In programming, if statements are effectively utilized in order to make decisions they are also known as conditional statements. In Python, the syntax of an if statement is as follows:
if (condition) followed by the statement;What is the significance of multiple if statements?The significance of multiple if statements is to evaluate more than one condition and return different values depending on the results. you'd use an IF formula to test your condition and return one value if the condition is met, and another value if the condition is not met.
The multiple if statements written in Python are as follows:
if carYear < 1967:print("Probably has few safety features.\n")
if carYear > 1971:print("Probably has head rests.\n")
if carYear > 1992:print("Probably has anti-lock brakes.\n")
if carYear > 2002:print("Probably has tire-pressure monitor.\n")
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