None of the given greedy algorithms for chained matrix multiplication work. A greedy algorithm is a problem-solving approach that makes the locally optimal choice at each stage with the hope of finding a global optimum.
To show that none of the given greedy algorithms for chained matrix multiplication work, we need to provide a counterexample for each algorithm. Here are the counterexamples:
1.
Compute the cheapest multiplication:
Consider the matrices A, B, C, and D, where A is 10 x 100, B is 100 x 5, C is 5 x 50, and D is 50 x 1. Suppose the costs of multiplying A and B, B and C, and C and D are all 0. Then, the cheapest multiplication according to this algorithm is A x B, which has a cost of 0. However, the optimal way to multiply these matrices is (A x B) x (C x D), which has a cost of 750.
2.
Compute the most expensive multiplication:
Consider the matrices A, B, C, and D, where A is 10 x 100, B is 100 x 5, C is 5 x 50, and D is 50 x 1. Suppose the costs of multiplying A and B, B and C, and C and D are all 0. Then, the most expensive multiplication according to this algorithm is C x D, which has a cost of 0. However, the optimal way to multiply these matrices is (A x B) x (C x D), which has a cost of 750.
3.
Compute the multiplication between the two matrices Mi and Mi+1 such that the number of columns in Mi is minimized (breaking ties by one of the rules above):
Consider the matrices A, B, C, and D, where A is 10 x 100, B is 100 x 5, C is 5 x 50, and D is 50 x 1. Suppose the costs of multiplying A and B, B and C, and C and D are all 0. Then, the multiplication between B and C has the fewest columns (5), so this algorithm would choose to multiply B x C first. However, the optimal way to multiply these matrices is (A x B) x (C x D), which has a cost of 750.
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Create a C++ program using arithmetic operators to compute the AVERAGE of THREE (3) QUIZZES and display the score and average on different lines.
The output should be similar to this:
using the knowledge in computational language in python it is possible to write a code that using arithmetic operators to compute the average of three quizzes and display the score and average on different lines.
Writting the code:#include <iostream>
using namespace std;
int main()
{
float n1,n2,n3,n4,tot,avrg;
cout << "\n\n Compute the total and average of four numbers :\n";
cout << "----------------------------------------------------\n";
cout<<" Input 1st two numbers (separated by space) : ";
cin>> n1 >> n2;
cout<<" Input last two numbers (separated by space) : ";
cin>> n3 >> n4;
tot=n1+n2+n3+n4;
avrg=tot/4;
cout<<" The total of four numbers is : "<< tot << endl;
cout<<" The average of four numbers is : "<< avrg << endl;
cout << endl;
return 0;
}
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Write code that creates a variable called count that has the value of 102. The code then prints the value of count.
I'm not really sure what language you want this in but since the usual language learnt in HS in C++, I'll do it in C++ and C
In C++ :
#include <iostream>
using namespace std;
int main()
{
int count = 102;
cout << "The value of count is" << count << endl;
return 0;
}
In C:
#include <stdio.h>
int main()
{
int count = 102;
printf("The value of count is %d", count);
return 0;
}
+10 points~~~Which option is used in emails to inform the recipient that they should exercise discretion in accordance with sharing the content of the message?
priority levels
sensitivity levels
follow-up flags
attachment icons
Answer:
Sensitivity Levels
Explanation:
Sensitivity Level is option use in email to inform the recipient that they should exercise discretion in accordance with sharing the content of the message.
Answer:
its sensitivity levels on edge 2020
Explanation:
I really need help please help me
Which of the following is an object-oriented programming language?
- Ada
- COBOL
- Pascal
- Python
Explanation:
This is the correct answer
pythonAnswer:
[D] Python
Explanation:
With the exception of control flow, everything in Python is an object.
Thus, python is an object-oriented programming language.
~Learn with Lenvy~
Businesses are required to follow laws and regulations but the follow ethical standards in a code of ethics
Answer:they should follow ethical standards.
Explanation:
Answer: chose to
Explanation:
a p e x
Consider the following method definition. The method printallcharacters is intended to print out every character in str, starting with the character at index 0. Public static void printallcharacters(string str) { for (int x = 0; x < str. Length(); x++) // line 3 { system. Out. Print(str. Substring(x, x + 1)); } } the following statement is found in the same class as the printallcharacters method. Printallcharacters("abcdefg"); which choice best describes the difference, if any, in the behavior of this statement that will result from changing x < str. Length() to x <= str. Length() in line 3 of the method?
The statement that will result from changing x < str.Lenght() to x <= str.Lenght() is C. the method will now cause a run-time error.
The code is written in Java programming language.
The method been called with printAllCharacters("abcdefg") which it mean there only have 7 elements but in Java their index start from 0 not 1, so their last index is 6 not 7.
Now we look the loop code is,
(int x = 0; x < str.Length() ; x++)
and the code to print is,
System.out.print(str.substring(x, x + 1)
In the first call it work correctly because the loop will break after x is equal to 5 and in the print the program will access the index 5 and index 6 (x+1).
But, after we change the code the loop will break after x is equal to 6 and in the print the program will access the index 6 and index 7 (x+1). Since, index 7 doesn't exist then the run-time error occur.
Thus, the method call, which worked correctly before the change, will now cause a run-time error because it attempts to access a character at index 7 in a string whose last element is at index 6.
You question is incomplete, but most probably your full question was
A Consider the following method definition. The method printAllCharacters is intended to print out every character in str, starting with the character at index 0. public static void printAllCharacters (String str) for (int x = 0; x< str.length(); x++) // Line 3 System.out.print(str.substring(x, x + 1)); The following statement is found in the same class as the printAllCharacters method. printAllCharacters ("ABCDEFG"); Which choice best describes the difference, if any, in the behavior of this statement that will result from changing x < str.length() to x <= str.length() in line 3 of the method?
Α) The method call will print fewer characters than it did before the change because the loop will iterate fewer times.
B) The method call will print more characters than it did before the change because the loop will iterate more times.
C) The method call, which worked correctly before the change, will now cause a run-time error because it attempts to access a character at index 7 in a string whose last element is at index 6.
D) The method call, which worked correctly before the change, will now cause a run-time error because it attempts to access a character at index 8 in a string whose last element is at index 7.
E) The behavior of the code segment will remain unchanged.
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what are the differences between Cc & Bcc in emails that are sent ?
Cc stands for " carbon copy " and Bcc stands for " Blind carbon copy ". The difference between Cc and Bcc is that carbon copy (CC) recipients are visible to all other recipients whereas those who are BCCed are not visible to anyone.
Answer:
CC- Carbon copy
BCC- Blind carbon copy
Explanation:
What does CC mean?
In email sending, CC is the abbreviation for “carbon copy.” Back in the days before internet and email, in order to create a copy of the letter you were writing, you had to place carbon paper between the one you were writing on and the paper that was going to be your copy.
Just like the physical carbon copy above, CC is an easy way to send copies of an email to other people.
If you’ve ever received a CCed email, you’ve probably noticed that it will be addressed to you and a list of other people who have also been CCed.
What does BCC mean?
BCC stands for “blind carbon copy.” Just like CC, BCC is a way of sending copies of an email to other people. The difference between the two is that, while you can see a list of recipients when CC is used, that’s not the case with BCC. It’s called blind carbon copy because the other recipients won’t be able to see that someone else has been sent a copy of the email.
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Merry Christmas ! good day
what percent of global ip traffic does online video account for in 2021?
During her presentation, Marie wanted more freedom to move about the room and interact with her audience. She can use _____.
notes pages and an LCD projector
laptop computer and a pointer
a laser pointer and a remote control
a long cable and a tablet
Answer:
The correct answer is:
"a laser pointer and a remote control"
Explanation:
Let us look at the options one by one.
notes pages and an LCD projector
When she is using these options, she cannot have the freedom to move as she has to operate the projector somehow.
laptop computer and a pointer
In this case she has to operate laptop so movement will be reduced.
A laser pointer and remote control will give her a lot of freedom to move as she can use the remote control to operate the slides and the pointer to point stuff ont the slides.
Hence,
The correct answer is:
"a laser pointer and a remote control"
True/False: Arguments/Parameters allow the use of different variable values each time the function is called.
True. Arguments/parameters in functions allow the use of different variable values each time the function is called.
This statement is true. Arguments or parameters in functions enable the passing of different variable values each time the function is called. When defining a function, you can specify one or more parameters within the parentheses. These parameters act as placeholders for the values that will be supplied when the function is invoked. By passing different arguments to the function, you can customize its behavior and make it operate on different data each time.
For example, consider a function called "multiply" that takes two parameters, num1 and num2. Inside the function, you can perform multiplication operations on these parameters. When calling the function, you can pass different values for num1 and num2, allowing you to perform multiplication with various combinations of numbers.
By utilizing arguments/parameters, functions become flexible and reusable, as they can adapt to different input values without the need for separate function definitions. This flexibility is one of the fundamental features of functions in most programming languages, including Python, JavaScript, and many others.
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Who plays Rblx?? What do yall play?
Answer:
i play rblx
Explanation:
queenloveadriana (main acc)
AdiosLoca (alt)
Azazel_Iblis (the acc I'll use for my YT channel)
I also play Fn, CofD, Destiny, 2k, Mortal Combat, but my PS4 broke and I'm waiting to get my PS5 that I ordered
Answer:
i do
Explanation:
Which type of attack can give an attacker access to a device and allow them to copy personal information using an unauthorized radio frequency connection?
Answer:
Hacking
Explanation:
The reason why is because hackers also use hacking as a way to copy personal information from your computer or try to take your identity.
The type of attack that copies data unauthorized is known as hacking.
What is hacking?Hacking is an illegal activity that was done by a man known as a hacker.
In hacking, the hacker can access your personal data and can copy it without your permission.
The attacker accesses a device and allows them to copy personal information using an unauthorized radio frequency connection is known as hacking.
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Define a enumerated type Direction to make the following code work correctly. It should associate EAST with the value 0, NORTH with the value 90, WEST with 180 and SOUTH with 270.Code:#include using namespace std;//Do not modify anything on or above the line below this//YOUR_CODE_BELOW//YOUR_CODE//YOUR_CODE_ABOVE//Do not modify anything on or below the line above thisint main(){ int d1; cin >> d1; //map values over 360 and greater back into 0-359 range d1 %= 360; if(d1 == NORTH) { cout << "North" << endl; } else if(d1 == SOUTH) { cout << "South" << endl; } else if(d1 == EAST) { cout << "East" << endl; } else if(d1 == WEST) { cout << "West" << endl; } else { cout << "Error" << endl; }}
To make the provided code work correctly, we need to define an enumerated type 'Direction' which will associate the directions EAST, NORTH, WEST, and SOUTH with values 0, 90, 180, and 270, respectively. Here is how the solution will look like:
```#include using namespace std;
// Do not modify anything on or above the line below thisenum Direction
{
EAST, NORTH = 90, WEST = 180, SOUTH = 270
};
// Do not modify anything on or below the line above this
int main()
{
int d1;
cin >> d1;
// map values over 360 and greater back into 0-359 range d1 %= 360;
if(d1 == NORTH)
{
cout << "North" << endl;
}
else if(d1 == SOUTH)
{
cout << "South" << endl;
}
else if(d1 == EAST)
{
cout << "East" << endl;
}
else if(d1 == WEST)
{
cout << "West" << endl;
}
else
{
cout << "Error" << endl;
}
return 0;
}
```Note that we first declared an enumerated type "Direction" with four named constants EAST, NORTH, WEST, and SOUTH, each of which is associated with an integer value 0, 90, 180, and 270, respectively. Then, we used these named constants in the main function to compare with user input "d1" to check if it matches the predefined directions. If "d1" matches one of the predefined directions, we output the corresponding direction, otherwise we output "Error".
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Something UNEXPECTED that happens while a
program is running
What is the word for this definition?
Answer:
Explanation:
An exception (short for "exceptional event") is an error or unexpected event that happens while a program is running
. (10 pts) describe how packet loss can occur at input ports. describe how packet loss at input ports can be eliminated (without using infinite buffers).
Packet loss at input ports occur due to congestion at the input port buffer. In cases where data is being sent at a higher rate than the buffer, packets start to queue up which causes congestion. When the buffer at the input port fills up completely, the new incoming packets are dropped thus leading to packet loss.
The following are some of the causes of packet loss at input ports:Overloading at the input port buffer: When the incoming traffic rate is higher than the buffer rate, packets may start queuing up which leads to congestion at the input port buffer. When the buffer is filled up, new incoming packets are dropped leading to packet loss. The buffer may be small or data may be coming in at a faster rate than the buffer can handle.Insufficient link capacity: If the link capacity of the incoming traffic is lower than the rate at which packets are arriving, the buffer may start dropping packets. The packets are dropped because the link can’t handle the rate at which the data is being sent, which leads to congestion at the input port buffer.Overprovisioned Links: Overprovisioned links can lead to packet loss because the input port will not be able to handle the rate of incoming data.
Overcoming packet loss at input portsThere are several methods of reducing packet loss at input ports. Here are some of the ways to reduce packet loss at input ports:RED (Random Early Detection) drops packets before the buffer fills up: RED has a better performance than WRED. When a packet arrives, the queue’s length is checked, if the length is above a certain threshold, the packet is dropped with a probability that increases as the queue length increases.Fair Queuing: Packets are divided into small flows, and each flow is assigned a queue. The number of packets in each queue is monitored and packets are dropped when they exceed the maximum queue length. It reduces packet loss by preventing a single large flow from congesting the buffer.TCP Window Size: The TCP window size can be reduced so that packets are not sent at a rate higher than what the buffer can handle. The disadvantage of reducing the TCP window size is that it reduces the overall throughput of the network. Explanation:Packet loss can occur at input ports when congestion occurs at the input port buffer.
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which of the following is true about a nic? a. for incoming messages, it adds a source and destination mac address. b. for outgoing messages, it converts frame data into bit signals. c. for incoming messages, it creates frames from packets. d. for outgoing messages, it assembles bit signals into frames.
The correct answer is (d) for outgoing messages, it assembles bit signals into frames.
What is a NIC?A NIC (Network Interface Card) is a hardware component that allows a computer to connect to a network.
It serves as the interface between the computer and the network, enabling data to be sent and received between the two.
Therefore, option (d) is correct as it correctly describes the function of a NIC for outgoing messages.
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Write code in C++ implementing Selection Sort. Your program should let the user enter how large of an array they wish to sort, followed by the values they wish to be in the array. It should print the unsorted and sorted array. Start with the bubblesort example from class/notes and replace the bubblesort function with a select sort function.
proceedure SelectionSort(array a, length(A) = n)
for i in 0 to n - 2
maxIndex = i
for j in (i + 1) to (n - 1)
if a[j] > A[maxIndex]
maxIndex = j
tmp = A[i]
A[i] = A[maxIndex]
A[maxIndex] = tmp
The user is prompted to enter the array's size and its elements in this software. The array is then sorted using the Selection Sort algorithm by calling the selection Sort method.
What will the array look like once the first pass has been executed if you are using selection sort?A selection sort assigns the first element of the unsorted array, which is drawn from its smallest elements, the top position. The next step is to choose and place the next-smallest item in its place. Once the entire array has been sorted, the process is repeated.
Including the iostream tag.
using the std namespace;
choice of nothing
For (int I = 0; I n - 1; i++) in Sort(int arr[], int n) If int maxIndex = I then for (int j = I + 1, then j n, then j++). maxIndex = j; int temp = arr[i]; arr[i] = arr[maxIndex]; arr[maxIndex] = temp; if (arr[j] > arr[maxIndex]) (arr[j] > arr[maxIndex]) (maxIndex > maxIndex);
for (int I = 0; I n; i++) cin >> arr[i]; int main() int n; cout "Input the size of the array: "; cin >> n; int arr[n]; cout "Enter the elements of the array: ";
cout "Unsorted array: "; for (int I = 0; I n; i++) cout arr[i] " "; cout endl; selection
Sort(arr, n); cout "Sorted array: "; for (int I = 0; I n; i++) cout arr[i] " "; cout endl; return 0;
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question 10 some versions of linux will automatically run fsck on your computer to check for issues and attempt to auto-repair the file system. in these cases, when will your system automatically run fsck?
Only when you update your Linux kernel is when will your system automatically run fsck. Hence, option A is correct.
The fsck command counts the number of data blocks and contrasts it with the inode's claimed number of blocks. The fsck command asks you to correct an inode if it has an erroneous count.
The fsck command is typically executed in a non-interactive manner to clean up file systems following a sudden system shutdown in which the most recent file system modifications were not stored to disk. Preening does not attempt to address more serious mistakes; it automatically corrects any simple file system anomalies.
Thus, option A is correct.
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The options were missing-
Only when you update your Linux kernel.
Only when the operating system sets a bit in a metadata file that indicates there's corruption.
At whatever time you schedule your system to run fsck.
Any time you boot your computer.
TRUE/FALSE. people who debug embedded software often use oscilloscopes and logic analyzers in addition to traditional debugging tools
True, people who debug embedded software often use oscilloscopes and logic analyzers in addition to traditional debugging tools.
When debugging embedded software, engineers frequently employ oscilloscopes and logic analyzers alongside traditional debugging tools. These additional instruments provide valuable insights into the hardware and low-level signals, aiding in the identification and resolution of issues.
Oscilloscopes are used to visualize and analyze electronic signals. They can capture and display waveforms, allowing engineers to observe the behavior of signals at various points in the embedded system. This helps in understanding timing, voltage levels, and other characteristics that might be affecting the software's functionality.
Logic analyzers, on the other hand, are specialized tools designed to capture and analyze digital signals. They provide detailed information about the state and timing of digital signals, enabling engineers to investigate the interaction between software and hardware components.
By utilizing oscilloscopes and logic analyzers, engineers can gain a deeper understanding of the system's behavior, detect timing issues, analyze data transactions, and verify the software's interaction with the hardware. These tools complement traditional debugging techniques and enhance the debugging process for embedded software development. Therefore, it is true that people who debug embedded software often utilize oscilloscopes and logic analyzers in addition to traditional debugging tools.
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you want to temporarily add the directory /usr/local/tempbin to the list of directories linux searches for commands. what would you type at a bash prompt to accomplish this goal?
To temporarily add the directory /usr/local/tempbin to the list of directories Linux searches for commands, you can use the export command in the bash shell. The export command is used to set environment variables in the shell.
You can add the directory to the PATH environment variable, which specifies the directories that the shell searches for commands. To do this, you would type the following command at the bash prompt:
export PATH=$PATH:/usr/local/tempbin
This will add the /usr/local/tempbin directory to the end of the PATH variable, allowing the shell to search for commands in that directory.
Note that this change will only persist for the current session. If you log out or close the terminal, the change will be lost. To make the change permanent, you will need to add the export command to your shell profile (e.g. ~/.bashrc or ~/.bash_profile).
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Nia would like to learn the basics of how to write a computer program. Which of the following languages is often used in schools and teaches students important programming concepts?
A. Java
B. Python
C. HTML
D. Block-based
Answer:
Block-based
Explanation:
Usually Block-based is used in schools because it doesn't really require any coding experience and is just drag-and-drop.
What is the csa term for something assigned to an entity within a given namespace?
the it manager in your organization has asked you to install the pulseaudio-equalizer.noarch package. in this lab, your task is to install the pulseaudio-equalizer.noarch package.
Since you want to use DNF to Install an RPM Package Lab and your task is to install the pulseaudio-equalizer.noarch package, the way to do it is
Type dnf install pulseaudio-equalizer at the prompt. Enter after noarch. To install the package, press Y and then Enter.What is in an RPM package?Typical RPM packages come with relevant configuration files, documentation, and binary executables. The rpm program is a potent package manager that may be used to install, query, verify, update, wipe, and produce RPM-format software packages.
Hence, the Red Hat package manager uses files with the RPM file extension to store installation packages for Linux operating systems. Since they are "packed" in one location, these files offer a simple means for software to be disseminated, and others.
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See full question below
6.2.5 Use DNF to Install an RPM Package Lab
In this lab, your task is to install the pulseaudio-equalizer.noarch package.
On start up, which of these windows is not displayed ?
2.
(a) The Blank Form window
(b) The Class window
(c) The Project window
(d) The Properties windov
Answer:
(d) The Properties window
Answer:
The Project Explorer window .
Explanation:
displays a list of forms and modules that make up your application. Generally, this is positioned under the tool bar on the right side of the screen. It acts a s a quick reference to the forms, classes and modules in a project.
Which statement describes an atomic nucleus?
...nucleus has no electrical charge.
Which is an example of a variable name written in camelcase?
Song Name
songName
song Name
SongNAME
Answer: songName
-DoggyMan5
What is output if the user types in 8? Click all that apply.
Answer:
can u show a picture??? or something
Which of the following advancements in agriculture is most environmentally conscious?
robotics
aquaculture
genetic engineering
GPS-enabled tractors
pls help me anyone pls have the right answer im failing
Write this name in your handwriting on a piece of paper best handwriting gets branilist
Cursive and continuous cursive are often considered to be the best handwriting styles for students to learn.
Which handwriting style is best?The two handwriting techniques that are generally regarded as the finest for students to acquire are cursive and continuous cursive.
Narrow right margins, a clear right slant, and lengthy, tall T-bars are all common writing characteristics. Other characteristics of the writers of the writing were also revealed by other handwriting characteristics.
Even writing with a pen and paper requires the use of muscle memory. Writing nicely will be more difficult for you if you don't regularly practise. Your handwriting will get much better if you spend 10 to 15 minutes each day writing neatly and slowly.
There are three of them: print, pre-cursive, and cursive.
1. Cursive
2. Pre-cursive
3. Print
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