Answer:
Explanation:
The critical section problem revolves around trying to ensure that at most one process is executing its critical section at a given time. In order to do so, the three following conditions must be met.
First, no thread may be executing in its critical section if there is already a current thread executing in its critical section.
Second, only the specific threads that are not currently occupied executing in their critical sections are allowed to participate in deciding which process will enter its critical section next.
Third, a preset limit must exist on the number of times that other threads are allowed to enter their critical state after a thread has made a request to enter its critical state.
Describe how catching exceptions can help with file errors. Write three Python examples that actually generate file errors on your computer and catch the errors with try: except: blocks. Include the code and output for each example in your post. Describe how you might deal with each error if you were writing a large production program. These descriptions should be general ideas in English, not actual Python code.
Answer:
Three python errors are; import error, value error, and key error.
Explanation:
Errors occur in all programming languages and just like every other language, python has error handling techniques like the try and except and also the raise keyword.
A value error occurs when an output of a variable or expression gives an unexpected value. Import error results from importing a module from an unknown source while a key error is from a wrong input keypress.
Catching these errors and raising an error gives more control and continuity of the source code.
Answer:
Catching exceptions helps a programmer to resolve raised issues at runtime instead of deliberately closing their program.
There are a lot of types of file errors. e.g. hadware/os errors, name errors,
operation errors, data errors.
Explanation:the function try will provide a testing of your code validating if it is correct, it will continue running. and adding the function except, it will print the error.
Dealing with the error depends on what you like the program to do and how you want to identify the errors so you can work on them.
What is the output of the following code segment? t = 0; if(t > 7) System.out.print("AAA"); System.out.print("BBB"); BBB AAABBB AAA nothing
Answer:
BBB
Explanation:
Given
Java code segment
Required
What is the output?
Analyzing the code segment 1 line after other
This line initializes t to 0
t = 0;
This line checks if t is greater than 7
if(t > 7)
If the above condition is true, the next line is executed
System.out.print("AAA");
NB: Since t is not greater than 7, System.out.print("AAA"); will not be executed
Lastly, this line executed
System.out.print("BBB");
Hence, BBB will be displayed as output
Regular Expression Replace Challenge
In this challenge you will use the file regex_replace_challenge_student.py to:
Write a regular expression that will replace all occurrences of:
regular-expression
regular:expression r
egular&expression
In the string: This is a string to search for a regular expression like regular expression or regular-expression or regular:expression or regular&expression
Assign the regular expression to a variable named pattern
Using the sub() method from the re package substitute all occurrences of the 'pattern' with 'substitution'
Assign the outcome of the sub() method to a variable called replace_result
Output to the console replace_results
Answer:
Here is the Python program:
import re # module for regular expressions
search_string='''This is a string to search for a regular expression like regular expression or regular-expression or regular:expression or regular&expression''' #string to search for a regular expression
pattern = "regular.expression" #Assigns the regular expression to pattern
substitution="regular expression" #substitute all occurrences of pattern with regular expression string stored in substitution
replace_results = re.sub(pattern,substitution,search_string) # sub() method from the re package to substitute all occurrences of the pattern with substitution
print(replace_results) #Assigns the outcome of the sub() method to this variable
Explanation:
This is a string to search for a regular expression like regular expression or regular-expression or regular:expression or regular&expression
search_string='''This is a string to search for a regular expression like regular expression or regular-expression or regular:expression or regular&expression'''
The following statement assigns the regular expression to a variable named pattern .
pattern = "regular.expression"
The following statement is used to substitute the pattern (regular expression) in the search_string by replacing all occurrences of "regular expression" sub-string on search_string.
substitution="regular expression"
The following statement uses re.sub() method to replace all the occurrences of a pattern with another sub string ("regular expression"). This means in search_string, the sub strings like regular expression, regular-expression, regular:expression or regular&expression are replaced with string "regular expression". This result is stored in replace_results variable. Three arguments are passed to re.sub() method:
sub string to replace i.e. pattern
sub string to replace with i.e. substitution
The actual string i.e. search_string
replace_results = re.sub(pattern,substitution,search_string)
The following print statement displays the output of replace_results
print(replace_results)
The output of the above program is:
This is a string to search for a regular expression like regular expression or regular expression or regular expression or regular expression
A python keyword______.
Answer:
cannot be used outside of its intented purpose
Explanation: python keywords are special reserved words that have specific meanings and purposes and can't be used for anything but those specific purposes
Which of the following is the MOST likely cause of the connectivity issues?A user of the wireless network is unable to gain access to the network. the symptoms are:_______a. Unable to connect to both internal and Internet resourcesb. The wireless icon shows connectivity but has no network access
Full questions and available options
A user of the wireless network is unable to gain access to the network. The symptoms are:
1.) Unable to connect to both internal and Internet resources
2.) The wireless icon shows connectivity but has no network access
The wireless network is WPA2 Enterprise and users must be a member of the wireless security group to authenticate.
Which of the following is the MOST likely cause of the connectivity issues?
A. The wireless signal is not strong enough
B. A remote DDoS attack against the RADIUS server is taking place
C. The user's laptop only supports WPA and WEP
D. The DHCP scope is full
E. The dynamic encryption key did not update while the user was offline
Answer:
C. The user's laptop only supports WPA and WEP
Explanation:
Given that the laptop's wireless icon shows connectivity but has no network access, and at the same time it is unable to connect to both internal and Internet resources, while the wireless network is WPA2 Enterprise and users must be a member of the wireless security group to authenticate, then it can be concluded that the most likely cause of the connectivity issues is "The user's laptop only supports WPA and WEP and not WAP2 Enterprise network."
Hence the right answer is Option C.
2. You have noticed over the past several days that your computer is running more slowly
than usual, but today it is running so slowly that you are unable to get your work done.
What is one possible reason for your computer's slow operation?
Answer:
Because of temporary file
Explanation:
Go to run and go in temporary file
If you experience a technical problem with Canvas or another computer application, what is the first thing you should do
Answer:
restart the application, if that doesn't work try a different internet server (if the application requires internet connection), free up ram, restart AND shut down your computer, undo any hardware or any softwar changes
Explanation:
Restart the application, if that doesn't work try a different internet server (if the application requires internet connection), free To begin with, the term of back-out plan in the field of computers.
What is back-out plan?The term of back-out plan in the field of computers refers to the situation where a person wants to restore a system to its original or previous state in the case where there is a failure trying to implent a new system.
Moreover, this back-out plan works as an action process where once the failure has happened then the system will intiate a series of procedures to uninstall or disintegrate the system that had the failure. It basically defines a contingency plan component of the IT service management framework.
Secondly, in the case presented where a person must decide what document he should address to resolve the problem then a back-out plan will be the most common response given the fact that it will quickly uninstall the new software that was not compatible with the old data fields and help the users to open their files without problems and later seek for a new way to install that new software.
Therefore, Restart the application, if that doesn't work try a different internet server (if the application requires internet connection), free To begin with, the term of back-out plan in the field of computers.
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A chord 6.6cm long is 5.6cm from the centre of a circle, calculate the radius of the circle
Answer:
chord 30cm long is 20cm from the centre of a circle calculate the length of a chord ... Find the length of an arc of a circle of radius 5.6cm which subtends an angle of 60°at the centre of the circle of the ...
Answer: radius = 6.5 cm
Explanation:
The distance from the center to the chord is measured at its perpendicular.
Therefore we can use Pythagorean Theorem to find the radius.
r² = 5.6² + 3.3²
r² = 31.36 + 10.89
r² = 42.25
[tex]\sqrt{r^2}=\sqrt{42.25}[/tex]
r = 6.5
Write a function "doubleChar(" str) which returns a string where for every character in the original string, there are two characters.
Answer:
//Begin class definition
public class DoubleCharTest{
//Begin the main method
public static void main(String [ ] args){
//Call the doubleChar method and pass some argument
System.out.println(doubleChar("There"));
}
//Method doubleChar
//Receives the original string as parameter
//Returns a new string where for every character in
//the original string, there are two characters
public static String doubleChar(String str){
//Initialize the new string to empty string
String newString = "";
//loop through each character in the original string
for(int i=0; i<str.length(); i++){
//At each cycle, get the character at that cycle
//and concatenate it with the new string twice
newString += str.charAt(i) + "" + str.charAt(i);
}
//End the for loop
//Return the new string
return newString;
} //End of the method
} // End of class declaration
Sample Output:TThheerree
Explanation:The code above has been written in Java and it contains comments explaining each line of the code. Kindly go through the comments. The actual lines of executable codes have been written in bold-face to differentiate them from comments.
A sample output has also been given.
Snapshots of the program and sample output have also been attached.
Were you surprised that devices have been around for thousands of years? what are your first memories for computers? discuss the privileges living in todays technology versus 20 years ago.
Answer:
No, I am not surprised devices have been around for thousands of year, as humans seek to make things easier by inventing devices for daily work support.
Explanation:
Computer as a device helps for computation of data to the much needed information. It is digital and fast. My first sight of a computer was a box with a small screen and other units like the keyboard and mouse. It was big and bulky. Now the computer system is compact and user friendly and used for daily human activities like graphic design, programming, gaming, playing music and videos, etc. It even have very high processing speed and multiple processor cores, this was not so in the past.
Which statement is correct? a. choice of metric will influence the shape of the clusters b. choice of initial centroids will influence the result c. in general, the merges and splits in hierarchical clustering are determined in a greedy manner d. All of the above
Answer: the answer is c
Explanation:in general, the merges and splits in hierarchical clustering are determined in a greedy manner
Which statement is correct is that All of the above options are correct. Check more about metric below.
What is metric?Metrics are known to be a unit that is often used in the measurement of quantitative works that are often used for comparing, tracking performance, etc.
Note that Metrics can be used in a lot of purposes and as such, the choice of metric will affect the shape of the clusters and the use of merges and splits in hierarchical clustering are set up in a greedy manner.
Learn more about metric form
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Write a C++ program that determines if an integer is a multiple of 7. The program should prompt the user to enter and integer, determine if it is a multiple of 7 by using a given formula and output the result. This is not meant to be a menu driven program so one run of the program will only offer one input and one output.
Answer:
#include <iostream> // Needed for input/output operation
int main() // define the main program
{
int userNumber = 0; // number storage for user input
std::cout << "Please enter an integer: "; // Ask user for number
std::cin >> userNumber; // Assumes user input is an integer
if (userNumber % 7 != 0) // Check to see if 7 divides user input
std::cout << "\nYour number is not a multiple of 7.\n";
else
std::cout << "\nYour number is a multiple of 7.\n";
return 0; // End program
}
For successful completion of an 8-Week course, how often should I visit the course web site to check for new e-mail and any instructor announcements?
Answer: The course web should be visited daily to check for new e-mail and any instructor announcement.
Explanation:
For any serious-minded and Intellectually inclined individual, who aimed for a successful completion of an 8-Week course, it's imperative for him/her to visit the course web site daily to check for new e-mail and any instructor announcements.
5- image I(x,y) with gray level in range[0.L-1) has applied with the spatial operation S-L-1-I(x,y)
this is Called :
(A) Gray-level Reduction ((B) Image Negative (C) morphology enhancement (D) Denoising
How do the following technologie help you in your quest to become a digital citizen: kiosks, enterprise computing, natural language processing, robotics, and virtual reality?
Answer:
kiosks
Explanation:
It is generally believed that a digital citizen refers to a person who can skillfully utilize information technology such as accessing the internet using computers, or via tablets and mobile phones, etc.
Kiosks (digital kiosks) are often used to market brands and products to consumers instead of having in-person interaction. Interestingly, since almost everyone today goes shopping, consumers who may have held back from using digital services are now introduced to a new way of shopping, thus they become digital citizens sooner or later.
Enterprise computing, natural language processing, robotics, and virtual reality are vital for an individual to become a digital citizen.
Enterprise computing simply means a business-oriented technology that's vital to the operations of a company. It's part of the critical infrastructure of a company.
Robotics is the design, construction, and the use of robots. It's used for assisting human beings to perform different operations.
Virtual reality refers to a stimulated experience that appears to make objects and scenes real. It should be noted that robotics, virtual reality, natural processing language, etc are vital for an individual to become a digital citizen.
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Jenae helps maintain her school web site and needs to create a web site poll for students. Which tool will she use? JavaScript HTML CSS Text editor
Answer:
Text Editor
Explanation:
What the question implies is that, what tool will she need to create the website.
And the answer is a text editor; this is so because the other three options are web development languages used in developing a website but the text editor is where she'll write her line of codes to create the required website poll.
Example of usable text editors are notepad and notepad++ etc.
If Janelle wants to create a school website for poll she has to make use of html.
What is HTML?
The full name for this is HyperText Markup Language. It is a programming language that is used to create websites.
It is very useful here because it helps to create structured documents. Therefore the HTML is the best tool for her.
Read more on HTML here
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What is the part of a system that defines the extent of the design pursuant to the operational requirements?
Answer:
The system's scope defines the extent of the design according to operational requirements. The proposed system is also subject to limits known as boundaries, which are external to the system. Boundaries are also imposed by existing hardware and software.
Which of the following specific components are incorporated on HDInsight clusters?
A. Storm
B. Spark
C. Hive
D. All the options
Answer:
D
Explanation:
The answer to this question is option D. All of the options are incorporated on HDinsight clusters.
HDInsight is very useful in the field of computer science because it creates a fast and easy way for large amounts of data to be processed. It also has the characteristic of being cost effective.
HDInsight has different cloud and open source frameworks. These includes:
HadoopHiveRLLAPSparkStormRead more at https://brainly.com/question/15399234?referrer=searchResults
After completing a scan, Microsoft Baseline Security Analyzer (MBSA) will generate a report which identifies security issues and:
Complete Question:
After completing a scan, Microsoft Baseline Security Analyzer (MBSA) will generate a report which identifies security issues and:
Group of answer choices
A. Describes how the vulnerabilities could impact the organization.
B. Provides recommendations for system configuration changes.
C. Lists them in alphabetical order.
D. Provides recommendations for additional personnel needed.
Answer:
B. Provides recommendations for system configuration changes.
Explanation:
The Microsoft Baseline Security Analyzer (MBSA) is a software program or application developed by Microsoft and it helps network security administrators to check for security updates, Structured Query Language (SQL) administrative vulnerabilities, Windows administrative vulnerabilities, Internet Information Services (IIS) administrative vulnerabilities, weak passwords, identifying missing security patches and common security misconfigurations.
After completing a scan, Microsoft Baseline Security Analyzer (MBSA) will generate a report which identifies security issues and provides recommendations for system configuration changes.
Microsoft Baseline Security Analyzer (MBSA) is a legacy software that scores the results of a scan and displays the items posing the highest risk first, based on Microsoft’s security recommendations.
describe how to perform a task, such as following a cake recipe, using simple and clear steps PLEASE HELP
Explanation:
Step 1: Choose a Recipe.
Step 4: Prep the Pans.
Step 6: Stir Together Dry Ingredients.
Step 7: Combine the Butter and Sugar.
Step 8: Add Eggs One at a Time.
Step 9: Alternate Adding Dry and Wet Ingredients.
Step 10: Pour Batter Into Pans and Bake.
Step 11: Check Cake for Doneness.
Answer: Prep the pans and sift the flower is right but everything else was wrong
Explanation:
Which of the following is true about occupations within the STEM fields? Many occupations use mathematics, even if it is not the primary focus of a given job. Engineering occupations rely solely on technology concepts to solve problems. Scientists assist technicians by collecting information. Most technology occupations require a higher education degree.
Answer:
Many occupations use mathematics, even if it is not the primary focus of a given job.
Explanation:
Think about software developers, they develop apps, websites, and other things, but they also use math in the process. Scientists use statistics. Mechanics use math to make sure their measurements are right. Therefore, I think your best bet would be
A. Many occupations use mathematics, even if it not the primary focus of a given job.
Answer:
Explanation:
Think about software developers, they develop apps, websites, and other things, but they also use math in the process. Scientists use statistics. Mechanics use math to make sure their measurements are right. Therefore, I think your best bet would be
A. Many occupations use mathematics, even if it not the primary focus of a given job.
what is the world first mobile phone brand
Answer:
The world first mobile phone brand is Motorola.
Answer:
bruh u have the internet u must be brain dead
Explanation:
its
Motorola
What three requirements are defined by the protocols used in network communcations to allow message transmission across a network?
Answer:
Message encoding, message size and delivery option.
Explanation:
The protocols used in network communications define the details of how a message is transmitted, including requirements for message delivery options, message timing, message encoding, formatting and encapsulation, and message size.
What is Animation?
(A) A cartoon
(B) The apparent movement of an object
(C) A file format
(D) All of the above
Answer:
Hey!
Your answer should be B The apparent movement of an object
Explanation:
Animation is a method in which figures are manipulated to appear as moving images...often done with softwares where you take multiple images per scene and string them together WHICH MAKES THE OBJECT MOVE!
HOPE THIS HELPS!
Competitive Pricing
Bill Schultz is thinking of starting a store that specializes in handmade cowboy boots. Bill is a longtime rancher in the town of Taos, New Mexico. Bill's reputation for honesty and integrity is well-known around town, and he is positive that his new store will be highly successful.
Before opening his store, Bill is curious about how his profit, revenue, and variable costs will change depending on the amount he charges for his boots. Bill would like you to perform the work required for this analysis and has given you the AYK12_Data.xlsx data file. Here are a few things to consider while you perform your analysis:_______.
• Current competitive prices for custom cowboy boots are between 5225 and $275 a pair.
• Variable costs will be either S100 or S150 a pair depending on the types of material Bill chooses
• to use.
• Fixed costs are $10,000 a month.
Data File: AYK12_Data.xlsx
Answer:
To calculate the profit of the month, the monthly cost should be extracted from the monthly generated revenue, while the revenue is the total sales of the store for the month.
Explanation:
In the excel file worksheet, the total number of shoes should be calculated. And a formula to calculate the revenue for the month should multiply the total shoes by the price of shoes per pair
The formula to calculate the profit is gotten from total sales minus the fixed cost.
AppWhich is the same class of lever as a broom?
A. A boat oar.
E
B. A baseball bat.
OC. A wheelbarrow.
D. A pair of scissors.
Answer:
A. boat oar is your answer hope it helped
Friend Functions of a class are________members of that class.
Answer:
Friend Functions of a class are not members of that class.
Explanation:
A friend function of a class is defined outside the class' scope, but has the access rights to all private and protected members of that class.
Cheers.
________________is a distribution of Linux Operating
system for desktop computers.
Answer:
Ubuntu
Explanation:
Ubuntu is based on Linux and Debian and is free/open-source. It’s released in 3 editions: Desktop, Core, and Server.
Hope this helped!
Describe Format Painter by ordering the steps Jemima should follow to make the format of her subheadings more
consistent
Step 1: Select the subheading with the desired format.
Step 2:
a
Step 3:
Step 4:
Step 5:
Step 6: Use Reveal Formatting to make sure formatting was copied.
Answer:
4,3,2,1
Explanation:
Answer:
Describe Format Painter by ordering the steps Jemima should follow to make the format of her subheadings more consistent.
Step 1: Select the subheading with the desired format.
Step 2:
✔ Navigate to the ribbon area.
Step 3:
✔ Go to the Clipboard command group.
Step 4:
✔ Click the Format Painter icon.
Step 5:
✔ Click and drag the icon on the second subheading.
Step 6: Use Reveal Formatting to make sure formatting was copied.
Explanation:
not needed
The contains_acronym function checks the text for the presence of 2 or more characters or digits surrounded by parentheses, with at least the first character in uppercase (if it's a letter), returning True if the condition is met, or False otherwise. For example, "Instant messaging (IM) is a set of communication technologies used for text-based communication" should return True since (IM) satisfies the match conditions." Fill in the regular expression in this function:
Answer:
Following are the code to this question:
import re#import package regular expression
def contains_acronym(val): #defining a method contains_acronymn that accepts text value in parameter
match= r"\([A-Z1-9][a-zA-Z1-9]*\)"#defining match variable that uses upper case, number, and lower case value
r= re.search(match, val)#defining r varaible that uses search method to search values
return r!= None #use return keyword
val="Instant messaging (IM) is a set of communication technologies used for text-based communication"
print(contains_acronym(val))#use print function to call method and print its return value
Output:
True
Explanation:
In the above-given code, first, we import package "regular expression" this package is used to check the string, In the next line, a method "contains_acronym" is defined that accepts a "val" variable in its parameters.
Inside the method, the "match" variable is defined that holds the uses upper case, number, and lower case values, and in the r variable the "search" method is defined, that search these and return the value. Outside the method, val variable is defined, that store string value and use print method is used that calls the method "contains_acronym".