in database design, the ideal primary key is short, numeric, and nonchanging. (True or False)
Answers
True. In database design, the ideal primary key should be short, numeric, and nonchanging.
This is because a primary key is used to uniquely identify each record in a table, and using a short, numeric value that doesn't change helps improve the efficiency of database operations such as searching and sorting. Additionally, nonchanging keys help ensure that relationships between tables are maintained even if data in other fields changes over time.
A database is a planned grouping of material that has been arranged and is often kept electronically in a computer system. A database management system (DBMS) typically has control over a database.
A database in computing is a structured collection of data that is electronically accessible and stored. Large databases are housed on computer clusters or cloud storage, whilst small databases can be stored on a file system.
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Given statement: In database design, the ideal primary key is short, numeric, and nonchanging.
The given statement is true.
A primary key is a unique identifier for each record in a database table, ensuring that no two records have the same value for this key.
Let's discuss each characteristic of an ideal primary key in brief:
Short: A short primary key is easier to manage, consumes less storage space, and improves database performance. Short primary keys make indexing and searching more efficient, as the database management system can process smaller amounts of data.
Numeric: Numeric primary keys, such as integers, are preferable because they provide faster querying and sorting compared to text-based keys. Numeric keys also take up less storage space and make it easier for the database management system to perform arithmetic and comparison operations.
Nonchanging: Primary keys should remain constant over time. Changing a primary key value can lead to data integrity issues, as other tables might have foreign keys referencing the original primary key value.
A nonchanging primary key ensures that these relationships are maintained and prevents potential problems caused by modifying key values.
In conclusion, an ideal primary key in database design should be short, numeric, and nonchanging to maintain data integrity, conserve storage space, and optimize database performance.
By adhering to these characteristics, you can create a more efficient and reliable database system.
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Related Questions
Who Has any idea How to code?
Answers
When do you use a for loop instead of a while loop?
Answers
Answer:
i dont know.prob guess a short loop.
Explanation:
When you right-click a picture in a word processing program, which actions can you choose to perform on that image?
You can choose to
an image when you right-click the picture in the word processing program. You can also choose to
an image when you right-click the picture in the word processing program
Answers
Answer:
Lots to choose from such as "copy" or "crop"
How to solve "upstream prematurely closed connection while reading response header from upstream"?
Answers
Answer:
"Upstream prematurely closed connection while reading response header from upstream" is an error message that can occur when there is a problem with communication between a web server and an upstream server. This can happen for a variety of reasons, including issues with the network connection, problems with the upstream server, or issues with the web server's configuration.
Here are some steps you can try to troubleshoot this error:
Check the network connection: Make sure the network connection between the web server and the upstream server is stable and not experiencing any issues.
Check the upstream server: If the upstream server is experiencing problems or is offline, it may be causing the error. You can try restarting the upstream server or checking its logs for more information.
Check the web server's configuration: Make sure the web server is properly configured to communicate with the upstream server. This may involve checking the web server's configuration files and ensuring that the correct hostname and port are specified for the upstream server.
Check for any error messages in the web server's logs: The web server's logs may contain additional information about the cause of the error.
Check for any system-level issues: If you are using a load balancer or other system-level software, it may be causing the error. You can try restarting or reconfiguring these systems to see if that resolves the issue.
It's also a good idea to check the documentation for the web server and the upstream server to see if there are any known issues or configuration changes that may be causing the error.
Explanation:
for the word shift register program shown the ____ instruction loads logic words into fifo stack:
Answers
The word shift register program shown in the question requires the "LOAD" instruction to load logic words into the FIFO stack.
This instruction is used to input data into the register and can be performed in several ways depending on the type of register used. In a shift register, the "LOAD" instruction will typically input data into the first stage of the register, causing all of the other bits to shift down by one position. This enables the register to store data in a serial manner and allows for the efficient transmission and processing of data.
In summary, the "LOAD" instruction is essential for loading logic words into the FIFO stack in the word shift register program. By inputting data into the first stage of the register, this instruction enables the efficient storage and processing of data in a serial manner.
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Define cell in MS-Excel.
Answers
Answer:
The intersection of rows and columns in a worksheet is called a cell
Biyu knows that she spends more time than she should on the computer. Lately, she has been getting a lot of
headaches. She is not sure if there is any connection between this and the time she spends on her laptop. What is
the BEST response to Biyu?
She may be exposed to too much red light from her computer screen.
O
There is a good chance it is eye strain, so she should cut back and see if that helps.
She is definitely injuring herself and should avoid all screens going forward.
Computers do not cause physical health problems, so it is likely something else.
Answers
There is a good chance it is eye strain, so she should cut back and see if that helps.
What is meant by eye ?
The visual system's organs include the eyes. They give living things the ability to see, to take in and process visual information, and to perform a number of photoresponse functions that are not dependent on vision.Light is detected by the eyes, which transform it into neuronal electro-chemical impulses.There are 10 essentially diverse types of eyes with resolving capacity, and 96% of animal species have an intricate optical system.Arthropods, chordates, and molluscs all have image-resolving eyes.The simplest eyes, known as pit eyes, are eye-spots that can be placed inside a pit to lessen the angle at which light enters and influences the eye-spot and to enable the organism to determine the angle of incoming light.To learn more about eye refer to
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________ can be used to produce automatic responses if data have been altered. ________ can be used to produce automatic responses if data have been altered. SQL code DML triggers Mirroring DDL triggers
Answers
DML triggers can be used to produce automatic responses if data have been altered. SQL code and DDL triggers may also be used, but they are not specifically designed for monitoring and responding to changes in data.
Mirroring is a data replication technology that involves copying data from one server to another without the use of triggers. It ensures data redundancy by maintaining an identical copy of the data on multiple servers, providing a failover mechanism in case of server failure. Mirroring is commonly used for high availability and disaster recovery purposes in database systems.
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In operant conditioning, the reduced frequency of behavior when it is no longer reinforced is known as:_______
Answers
In operant conditioning, the reduced frequency of a person's behavior when it's no longer reinforced is referred to as extinction.
The types of reinforcement.In operant conditioning, there are four (4) main types of reinforcement and these include the following:
PunishmentNegative reinforcementPositive reinforcementExtinctionIn operant conditioning, extinction refers to the reduced frequency of a person's behavior when it's no longer reinforced.
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A network administrator was testing an IPS device by releasing multiple packets into the network. The administrator examined the log and noticed that a group of alarms were generated by the IPS that identified normal user traffic. Which term describes this group of alarms
Answers
False positives are alerts that are triggered by security mechanisms but do not indicate a real intrusion, hazard, or cyberattack. They are events that the security system identifies as a possible risk when there is none. False positives can occur due to various reasons, such as similarities to recognized threats or human error.
Here's a step-by-step explanation:
False positives occur when security mechanisms, such as intrusion detection systems (IDS) or intrusion prevention systems (IPS), generate alerts indicating a potential security threat.
However, upon further investigation, it is determined that there is no actual intrusion or malicious activity taking place.
False positives can occur when the security system encounters input or network behavior that closely resembles known threats, triggering an alert even though there is no actual risk.
Human error or system misconfigurations can also contribute to false positives. For example, incorrect rule configurations or improper tuning of the security system may generate false alarms.
In the context of the given scenario, the IPS device was being tested by the network administrator. During the test, the IPS generated a group of alarms that identified normal user traffic as a potential security threat. These alarms were false positives because the traffic was legitimate and not malicious.
False positives can be problematic for security administrators because they can lead to alarm fatigue and overlook genuine security warnings. Dealing with a high number of false positives can consume valuable time and resources.
It is important for security administrators to fine-tune and optimize their security systems to minimize false positives while maintaining an effective level of threat detection.
In summary, false positives are alerts triggered by security mechanisms that incorrectly identify normal or benign activities as potential security threats. They can occur due to similarities to known threats or errors in system configuration, and managing false positives is crucial for maintaining an efficient and accurate security posture.
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(10 pts) task 1: read and study the textbook from page 164 to page 168, "a problem solved: transforming an infix expression to a postfix expression". use a stack to manually convert the following infix expression to postfix expression:
Answers
This process involves pushing operators onto the stack, popping operators from the stack to the output. By applying these steps correctly, you can obtain the desired postfix expression.
To manually convert the given infix expression to postfix expression using a stack, follow these steps:
1. Create an empty stack to store operators temporarily.
2. Start reading the expression from left to right.
3. If the character is an operand (a number or variable), add it directly to the output.
4. If the character is an opening parenthesis '(', push it onto the stack.
5. If the character is an operator (+, -, *, /), compare its precedence with the top of the stack. If the stack is empty or the top of the stack is an opening parenthesis, push the operator onto the stack.
6. If the character is a closing parenthesis ')', pop operators from the stack and add them to the output until an opening parenthesis is encountered. Discard both the opening and closing parentheses.
7. If the character is an operator (+, -, *, /), compare its precedence with the top of the stack. If the top of the stack has higher precedence, pop the operators from the stack and add them to the output.
8. After reading the entire expression, pop any remaining operators from the stack and add them to the output.
Now let's apply these steps to the given infix expression:
Infix Expression: (3 + 4) * 5 - 6 / 2
Output: 3 4 + 5 * 6 2 / -
Explanation:
1. Read the expression from left to right.
2. Add operands and push operators onto the stack according to the rules mentioned above.
3. When encountering a closing parenthesis, pop operators until an opening parenthesis is found.
4. Repeat steps 2 and 3 until the entire expression is processed.
In conclusion, to convert an infix expression to postfix expression using a stack, you need to follow a set of rules. This process involves pushing operators onto the stack, popping operators from the stack, and adding operands to the output. By applying these steps correctly, you can obtain the desired postfix expression.
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What does
mean in computer science
Answers
Answer:
i think the answer is a character or characters that determine the action that is to be performed or considered.
Explanation:
hope this helps
As the security administrator for your organization, you must be aware of all types of attacks that can occur and plan for them. Which type of attack uses more than one computer to attack the victim?
Answers
Answer:
The answer is "DDoS "
Explanation:
The distributed denial of service attack (DDoS) occurs whenever a directed program's wireless data or assets, generally one or even more application servers, were also swamped by various machines. This attack is always the consequence of many affected systems, that fill up the target network with traffic.
This attack is aimed to avoid legal customers of one's website from accessing it. In being effective in a DDoS attack, further demands need to be sent to the hacker than even the victim's server could deal with. One other way to successfully attack is to send fake requests from the attacker.heyyyyyy
byeeeeeeeeeeeeeeeeeeeeeee
Answers
Answer:
byeeeeeeee
Explanation:
Answer:
Heyyyyyyy
Byeeeeeee
Explanation:
I used a walmart MoneyCard and now it says its prepaid. Its my dad's card.
Answers
Answer:
oh- Did he find out-
Explanation:
Two strings are anagrams if they are permutations of each other. For example, "aaagmnrs" is an anagram of "anagrams". Given an array of strings, remove each string that is an anagram of an earlier string, then return the remaining array in sorted order. For example, given the strings s = ['code', 'doce', 'ecod', 'framer', 'frame'], the strings 'doce' and 'ecod' are both anagrams of 'code' so they are removed from the list. The words 'frame' and 'framer' are not anagrams due to the extra 'r' in 'framer', so they remain. The final list of strings in alphabetical order is ['code', 'frame', 'framer'].
Answers
Answer:
Here is the Python program:
def removeAnagram(array): #method to remove string from array of strings that is anagram of earlier string
s = set() #creates a set
output = [] #creates an output list
for string in array: # iterates through each string in array of strings
if ''.join(sorted(string)) not in s: #if sorted string of array is not in s
output.append(string) #append that string to output list
s.add(''.join(sorted(string))) #add that sorted string to s set
return sorted(output) #returns output list
array = ['code', 'doce', 'ecod', 'framer', 'frame'] #creates a list of words
print(removeAnagram(array)) #calls method to remove each string that is an anagram of earlier string
Explanation:
I will explain the program with an example:
Suppose array = ['code', 'doce', 'ecod', 'framer', 'frame']
Now the for loop works as follows:
At first iteration:
first string of array is 'code'
if ''.join(sorted(string)) not in s: this is an if statement which has two method i.e. join() and sorted(). First each letter of the string i.e. 'code' is sorted in alphabetical order then these separated characters are joined together into a word with join() method. So
sorted(string) becomes:
['c', 'd', 'e', 'o'] and ''.join(sorted(string)) becomes:
cdeo
Now if ''.join(sorted(string)) not in s condition checks if cdeo is not in s set. This is true so the statement:
output.append(string) executes which appends the string to output list. So now output has:
['code'] Next s.add(''.join(sorted(string))) statement adds the sorted and joined string of array to s set. So the set has:
{'cdeo'}
So at each iteration each word from the array is sorted and joined and then checked if output array contains that word or not. If not then it is added to the output array otherwise not. For example at 2nd iteration the word 'doce' which is anagram of code and it is checked when it is sorted and joined and it becomes cdeo which is already in output array. So this is how the anagram is removed from the array. At the end the output array which returns the remaining array in sorted order is returned by this method. The screenshot of the program along with its output is attached.
The program is an illustration of loops.
Loops are used to perform repetitive and iterative operations.
The program in Python, where comments are used to explain each line is as follows:
#This initializes the list of words
myList = ['code', 'doce', 'ecod', 'framer', 'farmer']
#This creates a set
mySet = set()
#This creates a new list for output
newList = []
#This iterates through the list
for elem in myList:
#This checks if a sorted list element is not in the set
if ''.join(sorted(elem)) not in mySet:
#if yes, the list element is appended to the new list
newList.append(elem)
#And then added to the set
newList.add(''.join(sorted(elem)))
#This prints the anagram
print(sorted(output))
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For angular how can we set up th edatabse.
Answers
Based on what you know about the Sort and Find functions, return to the database file to determine the answers to the following questions.
In which year did most people update their contact information?
1988
2010
2011
2012
Answers
Answer:
2010
Explanation:
Most of the people updated their information in the database in the year 2010. The database files have different functions which enable the sorting of data according to the contact information with year wise filter.
Answer:
It’s 2012
Explanation:
Select all that apply: Our primary objectives in functional programming are: Group of answer choices Functions should be as pure as possible following a pattern of Input->Processing->Output To model algorithms in a state-machine like format Removing state from programming Modeling data into a fact-base to be queried Raising our abstraction towards math Code free of side effects Modeling data into classes/objects that intercommunicate to solve software issues
Answers
Answer:
Functions should be as pure as possible following a pattern of Input->Processing->Output
To model algorithms in a state-machine like format
Code free of side effects
Explanation:
Functional programming is a popular concept in most popular programming languages such as Lisp that makes use of functions in separating code that aims to define and solve a particular problem which is part of a bigger problem. Functional programming focuses on what to solve, ie what is the problem rather than how do we solve it. It divides up code in meaningful blocks that makes it a lot more understandable, allowing big problems to be solved in tiny bits and not an overwhelming whole. Functional programming adopts the state-machine like format as it makes use of input and alters state as necessary(not hard coded). It also removes side effects issues that may be experienced when a function affects or mutates variables(global variables) that may be outside its block.
Custodial workers that access the terminal area must have a fingerprint background check done and training unless they are escorted in these areas. True False
Answers
Answer:
True they do. mark brainliest.!!!!! please
Explanation:
Which device is able to stop activity that is considered to be suspicious based on historical traffic patterns?
Answers
Answer:
network security tools.Network Intrusion Detecting system NIDS.
When an entrepreneur has three employees at a busy and growing software company, what is the primary responsibility of the employees?
create the product that customers want
explain business decisions to stakeholders
identify and contact financial investors
select new types of software to sell
Answers
Answer:
A: Create the product that customers
Explanation:
I did it on edgy
Answer:
(A). Create the product that customers want
Explanation:
I got it right on edge2020.
Which finger types the highlighted keys?
Answers
Answer:
Index
Explanation:
The index finger lays positioned upon the 4 key.
A writing guide in making a project correctly.
a.project proposal
b.project plan
c.project format
d.project template
Answers
Answer:
b
Explanation:
whyy can not install to this volume because the computer is missing a firmware partition?
Answers
This is because the firmware partition is required for the computer to boot up, and without it, the computer cannot install the software.
What is Firmware?Firmware is a type of low-level software designed to control the hardware of a device. It is stored in non-volatile memory, such as Read Only Memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory, or a combination of these. Firmware is typically used to control basic functions of a device and can be updated or replaced to add or improve features. Firmware is often found within embedded systems such as televisions, routers, printers, and cameras.
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If a class object is ____, then it is created each time the control reaches its declaration, and destroyed when the control exits the surrounding block.
Answers
If a class object is declared as a local variable, then it is created each time the control reaches its declaration, and destroyed when the control exits the surrounding block.
This is called automatic or local object lifetime. Local objects are declared within a block of code, such as a function or a loop, and they are only accessible within that block. Once the block of code is exited, the local object is destroyed.
Local objects are useful when you need to perform some operations within a limited scope. For example, you may want to create a temporary object to perform some computations, or you may want to create an object to hold some data that is only needed within a specific block of code.
The lifetime of local objects is determined by their scope, which is the block of code in which they are declared. When the block of code is exited, the local objects are automatically destroyed, and their memory is released. This makes local objects very efficient in terms of memory management, as they do not require manual allocation or deallocation.
Overall, local objects provide a convenient and efficient way to manage resources within a limited scope. By declaring objects as local variables, you can ensure that they are automatically created and destroyed as needed, without having to worry about memory management or resource leaks.
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Write a program to show the grade obtained by a student after he/she enters their total mark percentage. Program should accept an input from the user and display their grade as follows Mark Grade < 90 A 80-89 B 70-79 C 60-69 D 50-59 E < 50 Failed
Answers
what is email?
An email is a message sent from one device ( computer or smartphone to another over the internet by using the mailing address of senter and recipient.
Answers
Email addresses are used to send emails from one user to another over the internet that can contain text, photos, and attachments.
A message transferred from one computer to another via the internet is an email, right?A computer application called e-mail enables users to exchange messages with one another in order to communicate. Thanks to a worldwide email network, people may communicate via email quickly. E-mail is a letter's electronic equivalent and has the advantages of flexibility and promptness.
What is a Mcq email response?Email, often known as E-mail, is a technique of communicating with others using electronic devices to exchange messages.
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Question 10 of 10
What may occur if it is impossible for the condition in a while loop to be
false?
A. The program will find a way to meet the condition.
B. The loop will iterate forever.
C. The game's performance will speed up.
D. The amount of code will not be manageable.
SUBMIT
Answers
The loop will iterate forever.
In Python, a function is _____.
a group of instructions that can be used to organize a program or perform a repeated task
a value that can be passed back to the calling part of a program
a formula that pairs each x-value with a unique y-value
a value that can be passed
Answers
Answer:
a group of instructions that can be used to organize a program or perform a repeated task
Explanation:
A function is a group of commands that can be called upon with extra parameters if needed.
Example:
def foo(): #defining this function and naming it foo
return True #what is performed when foo is called on
if foo() == True: #foo() is calling on a function named foo
print('yes')