Imagine you are working on a data/file compression tool such as 7Zip or WinZip. Most of these tools support more than one compression algorithms, and can compress any file or data using one of those compression algorithms that the user selects.
Examples of these compression algorithms are zip, bzip, tar, rar, 7z, etc. In future, more compression algorithms maybe developed.
Also, keep in mind that the file or the data that are being compressed are NOT part of the compression algorithms. Instead, they are fed to the selected compression algorithm when a user does the compression.
So every compression algorithm must have at least two operations or methods:
SetData(string) - this method is used to pass the data to compress.
DoCompression() - this method compresses the data and returns the compressed data.
Also, there should be an Application class. It will have the following operations or methods:
AddCompressionAlgorithm(object) - this method will allow adding one or more compression algorithms into the list of available algorithms in the application you are building. In this way, more algorithms can be added in future to the list of available ones when new algorithms are invented.
SelectCurrentAlgorithm(id) - this method will select a compression algorithm as the current one from the available list to do the compression.
OpenFile(filename) - this method will simply open a file, read its content and store the data internally. For this test, you won’t actually have to read files from disk. Just create the method and populate with dummy string data.
Compress() - this method does the compression of the data using the currently selected algorithm.
Your task is to write a program with necessary interfaces, classes and sub-classes that will allow you to simpulate the above tool. Write the classes representing different compression algorithms.
The goal is to manage a family of compression algorithms, interchange between them anytime, and support development of future compression algorithms - all without modifying the base code.
Please note that you won’t actually have to write code for data compression. Just print which is which so that we understand. No need to take input from console (i.e. keyboard). You can directly use variables inside your main( ).
NOTE: PLEASE USE JAVA TO SOLVE
Answers
Here is the program in Java for a data/file compression tool such as 7Zip or WinZip:
class CompressionAlgorithm {
String algorithmName;
public CompressionAlgorithm(String name) {
this.algorithmName = name;
}
public void SetData(String data) {
System.out.println("Setting data for " + algorithmName + " compression algorithm: " + data);
}
public String DoCompression() {
System.out.println("Compressing data using " + algorithmName + " compression algorithm");
return "Compressed data using " + algorithmName + " algorithm";
}
}
class ZipAlgorithm extends CompressionAlgorithm {
public ZipAlgorithm() {
super("Zip");
}
}
class BZipAlgorithm extends CompressionAlgorithm {
public BZipAlgorithm() {
super("BZip");
}
}
class TarAlgorithm extends CompressionAlgorithm {
public TarAlgorithm() {
super("Tar");
}
}
class RarAlgorithm extends CompressionAlgorithm {
public RarAlgorithm() {
super("Rar");
}
}
class _7zAlgorithm extends CompressionAlgorithm {
public _7zAlgorithm() {
super("7z");
}
}
class CompressionAlgorithmsList {
ArrayList<CompressionAlgorithm> compressionAlgorithmsList = new ArrayList<>();
public void AddCompressionAlgorithm(CompressionAlgorithm compressionAlgorithm) {
compressionAlgorithmsList.add(compressionAlgorithm);
}
}
class Application extends CompressionAlgorithmsList {
CompressionAlgorithm currentAlgorithm;
String fileContent;
public void SelectCurrentAlgorithm(int id) {
currentAlgorithm = compressionAlgorithmsList.get(id);
}
public void OpenFile(String filename) {
fileContent = "Sample file content";
}
public String Compress() {
currentAlgorithm.SetData(fileContent);
return currentAlgorithm.DoCompression();
}
}
public class Main {
public static void main(String[] args) {
Application app = new Application();
app.AddCompressionAlgorithm(new ZipAlgorithm());
app.AddCompressionAlgorithm(new BZipAlgorithm());
app.AddCompressionAlgorithm(new TarAlgorithm());
app.AddCompressionAlgorithm(new RarAlgorithm());
app.AddCompressionAlgorithm(new _7zAlgorithm());
app.SelectCurrentAlgorithm(2);
app.OpenFile("test.txt");
System.out.println(app.Compress());
}
}
This is the Java program for a data/file compression tool. It has a class CompressionAlgorithm for the compression algorithms with two methods: SetData(string) and DoCompression(). Each algorithm has its own name, which is passed to the superclass constructor when a new instance is created. There are five subclasses of CompressionAlgorithm:
ZipAlgorithm, BZipAlgorithm, TarAlgorithm, RarAlgorithm, _7zAlgorithm.The Application class inherits from CompressionAlgorithmsList, which is a list of CompressionAlgorithm objects. Application has methods to select the current algorithm, open a file and read its contents, and compress the data using the current algorithm.
In the main function, an instance of the Application class is created, and compression algorithms are added to the list. The third algorithm in the list is selected, and a dummy file is opened. Finally, the file is compressed using the selected algorithm, and the output is printed.
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Related Questions
What is the output for the following portion of a program? Assume the user enters 162.5.
strWeight = input("Enter your weight in pounds: ")
weight = float(strWeight)
print (weight)
162.5
O 162
O 163
O An error occurs.
Answers
If the user enters 162.5, the output will be 162.5
Answer:
162.5
Explanation:
just took this on edge. have a good one!
name instances in the past where social media has kept you informed about the latest news around the country
Answers
Logo Game:name the 10 social media logos you see in the picture below
Answers
1 twitter
2 Insta
4 g o o g le drive
5 Pinterest
6.Tumbir
7.WordPress
8.Reddit\
hope this helps i dont know a couple
Social media is an internet base platform that allows interactions among people while creating and sharing data.
The Logo in the picture is as follows:
1. T--witter
2. Ins--tagram
3. Friend--star
4. Go--ogle drive
5. Pin--terest
6. Tum--bir
7. Word--Press
8. Red--dit
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This is for career exploration, I need help please! <3 HELPPPP
Grant and Cara are coworkers at a design firm. Grant is so good at his job that he does not like to listen to the opinions of others. Cara is not as experienced as Grant and it takes her a little bit longer to complete design tasks, but she is a good listener and tries to make changes that her co-workers suggest. Which person would you rather work with? Give two reasons for your answer. Why might co-curricular, extra-curricular, career preparation, or extended learning experiences have been important in helping prepare the person you chose to have those qualities that are desirable in the workplace?
Answers
Answer: cara.
Explanation: i would pick cara because she would listen to you better and Luke try her best to get what you want!
Answer:
CARA
Explanation:
1. I would rather work with Cara because she would listen to me and understand me that in my opinion is a good co worker
List two examples of following types of communication
Answers
Non-Verbal Communication. What we do while we speak often says more than the actual words. ...
Answer:
Explanation:
sign language is communication
touch is communication
Which of the following statements is true? When opening a file, you can specify the name of the file only as a pointer-based string. When opening a file, you can specify the name of the file only as a string object. When opening a file, you can specify the name of the file as either a pointer-based string or a string object. None of these.
Answers
The statement that is true is when opening a file, you can specify the name of the file as either a pointer-based string or a string object.
What is a string object?The String object is known to be that which gives one the ability to work with a numbers of characters.
Note that The statement that is true is when opening a file, you can specify the name of the file as either a pointer-based string or a string object as it is the right option.
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Which programming paradigm is focused primarily on the data and how it is modeled and used?group of answer choicesobject-orientedimperative/proceduralservice orientedfunctional
Answers
The programming paradigm that is focused primarily on the data and how it is modeled and used is the object-oriented paradigm.
We have to give that,
To find the programming paradigm which is focused primarily on the data.
The programming paradigm that is focused primarily on the data and how it is modeled and used is the object-oriented paradigm.
Object-oriented programming (OOP) revolves around creating objects that encapsulate both data and the operations that can be performed on that data.
It emphasizes the organization and manipulation of data through objects and their interactions.
Hence, The programming paradigm that is focused primarily on the data and how it is modeled and used is the object-oriented paradigm.
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write a java program to display simple interest by taking input as assignment
Answers
Sure! Here's a Java program that takes user input for the principal amount, interest rate, and time period in years, and then calculates and displays the simple interest:
The Programimport java.util.Scanner;
public class SimpleInterest {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
// get input from user
System.out.print("Enter principal amount: ");
double principal = input.nextDouble();
System.out.print("Enter interest rate: ");
double rate = input.nextDouble();
System.out.print("Enter time period (in years): ");
double time = input.nextDouble();
// calculate simple interest
double interest = (principal * rate * time) / 100.0;
// display result
System.out.printf("Simple interest = %.2f", interest);
}
}
Here's an example of how to use the program:
Enter principal amount: 1000
Enter interest rate: 5
Enter time period (in years): 2
Simple interest = 100.00
In this example, the user enters a principal amount of 1000, an interest rate of 5%, and a time period of 2 years. The program calculates the simple interest as 100.00 and displays the result.
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a(n) is any piece of data that is passed iwhen a function is called by its name during the execution of a program, then it isto a function when the function is called.
Answers
An argument is any piece of data that is passed when a function is called by its name during the execution of a program, then it is to a function when the function is called. The correct option is b.
What is execution of a program?To execute a program in a computer is to run the program in the computer and, by extension, to start it up. People run programs in use, and systems execute them. A program is executed using system memory.
An argument allows you to provide additional information to a function. The function can then use that information as a variable while running.
To put it another way, when you write a function, you can pass data in the form of an argument, also known as a parameter.
Thus, the correct option is b.
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Your question seems incomplete, the missing options are:
a. global variable
b. argument
c. local variable
d. parameter
A _____ is a collection of (potentially) thousands of computers that can respond to requests over a network
Answers
Answer:
server or supercomputer
Explanation:
which is always true about java classes? a. a class can implement only one interface b. a class can extend from multiple classes c. an interface can implement multiple classes d. a class can implement multiple interfaces e. none of the above
Answers
The correct statement about Java classes is that a class can implement multiple interfaces. This means that a class can provide implementation for multiple sets of behaviors or functionalities defined by different interfaces.
However, a class can only extend from a single class in Java, which means it can inherit and reuse the properties and methods of only one parent class. This is because Java does not support multiple inheritance of classes to avoid the complexities and ambiguities that may arise from it. On the other hand, an interface in Java can only extend from one or more interfaces but cannot implement any class. It defines a contract of methods that a class implementing it must implement. Therefore, the correct option is d. a class can implement multiple interfaces. The other options are incorrect.
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1)Which tool can you use to find duplicates in Excel?
Select an answer:
a. Flash Fill
b. VLOOKUP
c. Conditional Formatting
d. Concatenation
2)What does Power Query use to change to what it determines is the appropriate data type?
Select an answer:
a.the headers
b. the first real row of data
c. data in the formula bar
3)Combining the definitions of three words describes a data analyst. What are the three words?
Select an answer:
a. analysis, analyze, and technology
b. data, programs, and analysis
c. analyze, data, and programs
d. data, analysis, and analyze
Answers
The tool that you can use to find duplicates in Excel is c. Conditional Formatting
b. the first real row of datac. analyze, data, and programsWhat is Conditional Formatting?Excel makes use of Conditional Formatting as a means to identify duplicate records. Users can utilize this feature to identify cells or ranges that satisfy specific criteria, like possessing repetitive values, by highlighting them.
Using conditional formatting rules makes it effortless to spot repeated values and set them apart visually from the other information. This function enables users to swiftly identify and handle identical records within their Excel worksheets, useful for activities like data examination and sanitation.
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External equity pay comparisons focus on: a. using job evaluation tools to determine a job's worth to other jobs in the organization. b. what individuals in the same organization doing the same job are paid. c. what other organizations pay for roughly the same job. d. what employees within the same organization but in different jobs are paid.
Answers
what other organizations pay for roughly the same job.External equity pay comparisons focus on comparing the pay levels of similar jobs in other organizations.
The purpose is to assess how an organization's compensation practices align with the external market and to ensure that employees' pay is competitive and in line with industry standards. By comparing pay rates for similar jobs in other organizations, employers can gather information about prevailing market rates and make adjustments to attract and retain talent. This process involves collecting data on compensation surveys and analyzing salary ranges, benefits, and other forms of remuneration provided by other employers for similar roles. The goal is to establish equitable pay structures that are competitive in the external job market and help attract and retain qualified employees.
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Non- intentional errors caused by computer users such as erase or overwrite data or through viruses passed from secondary storage devices or the internet
Answers
Answer: I think yes
Explanation: because of national computer errors I do think that secondary storage devices should be needed.
Write a function that takes the name of a file with a .csv extension (a comma-separated value file), and writes a new file that is equivalent (same name and same data) but with a .tsv extension (a tab-separated value file: like a CSV but with tabs instead of commas separating the elements of the file). Note: the character used to represent a tab is ‘\t’.
Answers
Answer:
import pandas as pd
def convert_to_tsv( csv_filename ):
df = pd.read_csv("csv_file")
df.to_csv("csv_filename.tsv", sep='\t')
Explanation:
The python program uses the pandas' module to read in the csv file in the function "convert_to_tsv". The file is saved as a tsv file with the pandas to_csv method and the " sep= '\t' " attribute.
(c) Explain these THREE (3) terms in product design and development: (i) Design for operations (DFO) (3 marks) (ii) Prototype development. (2.5 marks) (iii) Computer Aided Design (CAD) (2.5 marks)
Answers
Three terms explanation in Product design and development is:
(i) Design for Operations (DFO): DFO stands for Design for Operations. It is a phase of the design process in which a product is designed to be readily manufactured. The intent of DFO is to optimize a product design for ease of assembly, maintenance, and servicing.
DFO aids in the reduction of manufacturing costs, as well as the identification of the best materials and processes for a product. DFO is a vital component of design for manufacturing, which is a philosophy that stresses the importance of designing products that can be quickly and efficiently produced.
(ii) Prototype Development: Prototype development is the process of creating a model or prototype of a product. The goal of prototyping is to test a product's design and functionality before manufacturing begins.
Prototyping allows designers to refine a product's design and make necessary changes before committing to the costly manufacturing process. It also allows for the identification of any design flaws or areas of improvement before the final product is produced.
(iii) Computer-Aided Design (CAD): CAD, which stands for Computer-Aided Design, is a software tool used in product design and development. CAD software is used to create 2D and 3D models of products that can be easily modified and edited.
The software allows designers to visualize and manipulate product designs in a digital environment, reducing the need for physical prototypes. This makes the design process faster and more efficient, as well as allows for the exploration of multiple design options.
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TRUE OR FALSE 2. A branch instruction changes the flow of information by changing the PC.
Answers
True. A branch instruction changes the flow of information by altering the Program Counter (PC), which determines the next instruction to be executed in a program. This allows for conditional or unconditional jumps in the execution sequence.
A branch instruction is a type of instruction in machine language that changes the flow of execution in a computer program by altering the value of the PC (Program Counter) register. The PC register holds the memory address of the next instruction to be fetched and executed by the CPU (Central Processing Unit).When a branch instruction is encountered, the CPU calculates a new memory address for the next instruction based on the operand of the branch instruction, and updates the PC register with this new address. This causes the CPU to fetch and execute the instruction located at the new address, rather than the next sequential instruction.
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James entered into a public cloud computing arrangement without reviewing the standard contract carefully. What problem is he most likely to face as a result?
a) Unexpected cloud downtime
b) Insufficient storage capacity
c) Inadequate data security
d) Inflexible pricing structure
Answers
Unexpected cloud downtime is the most likely to face as a result.
Thus, A disruption in cloud-based services is known as cloud downtime. The migration of more businesses to the cloud means that any disruption in cloud services might be expensive.
According to Gartner, the average cost of cloud downtime is $300,000 per hour. Major cloud service companies appear to routinely report disruptions. These interruptions can endure for a few hours or several days. Three outages affected AWS in a single month in 2021.
An outage of any length can have a negative impact on the bottom line for businesses that are still working to incorporate cloud technology into their business strategy.
Thus, Unexpected cloud downtime is the most likely to face as a result.
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How do we know if we can believe the things on the internet?
Answers
Answer:
you have to check for reliability
Explanation:
Answer:
you can't always believe the internet some stuff is false are bended
Explanation:
yea
which of the following is the microsoft version of eap?
EAP-MS
MS-CHAP
PAP-MICROSOFT
AD-EAP
Answers
Microsoft's MS-CHAP eap variant.
Which access control model is the most limiting of the following?The most stringent access control type now in use is generally regarded as mandatory access control. Only the system's owner is able to manage and control access under this sort of access control, according to the rules established by the system's programmed parameters.
What three types of access control are there?Discretionary Access Control (DAC), Role Based Access Control (RBAC), and Mandatory Access Control are the three basic categories of access control systems (MAC). A particular kind of access control system called DAC grants access rights in accordance with rules that users specify.
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Help ASAP I’ll give brainliest
Answers
Explanation: I love you
How to call a variable as a tag in react native.
Answers
Explanation:
There is no need of adding template strings inside a <Text> component for adding strings in react-native. You can just use simple text and for variables, you can wrap it with curly braces
difference between electrical and electronic devices
Answers
Answer:
The differences between electrical and electronic devices is that electrical uses as energy for necessary purposes, while electronic devices are being manipulated by the electrons that are inside of the device's battery :3
Explanation:
:3
Could 13.5\text{ cm}, 8.0\text{ cm},13.5 cm,8.0 cm,13, point, 5, start text, space, c, m, end text, comma, 8, point, 0, start text, space, c, m, end text, comma and 3.5\text{ cm}3.5 cm3, point, 5, start text, space, c, m, end text be the side lengths of a triangle?
choose 1 answer:
Answers
Yes, they could be the side lengths of a triangle.
Yes, the side lengths 13.5 cm, 8.0 cm, and 3.5 cm can form a triangle. To determine if these lengths create a valid triangle, we can use the Triangle Inequality Theorem. The theorem states that for any triangle, the sum of the lengths of any two sides must be greater than the length of the remaining side. In this case:
1. 13.5 cm + 8.0 cm > 3.5 cm (21.5 cm > 3.5 cm)
2. 13.5 cm + 3.5 cm > 8.0 cm (17 cm > 8.0 cm)
3. 8.0 cm + 3.5 cm > 13.5 cm (11.5 cm > 13.5 cm)
All three conditions are satisfied, so the given side lengths can form a triangle.
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Which three pieces of information must you include in a project goals document? (Choose 3)
A) Target audience
B) Project deadline
C) Project purpose
D) Color palette
E) Hero image
Answers
Answer:
A) Target audience
B) Project deadline
C) Project purpose
Explanation:
The project goals document outlines the scope of the project, detailing what the project entails to everyone that is to work on the project such that the objectives to focused on, the tasks to be completed, the timeline and deadline of the project, the project participants, and audiences are known or understood, thereby placing everyone in the project team on track
The three pieces of information that must be included in a project are therefore; the target audience of the document, the deadline of the project, clearly stated, and the purpose of the project; what the project is going to accomplish
The three pieces of information you must include in a project goals document are:
A) Target audience B) Project deadline C) Project purposeAccording to the given question, we are asked to show the three pieces of information you must include in a project goals document and why they are important when making a project goal.
As a result of this, we can see when making a project goals document, it is important to include the target audience, project deadline and the project purpose because it gives the project a clear objective and deadline which can be achieved.
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A Document's Format is??
Answers
Answer:
A text or binary file format for storing documents on a storage media, especially for use by computers.
Explanation:
Answer:
The shape, size, design, and arrangement of its physical elements
Explanation:
Create a method that counts how many numbers are divisible by 3 in an int array. a. Create an overloaded method that finds how many numbers are divisible by 3 in a double array. b. In the main method, test out both methods by creating an integer array and a double array with numbers of your choosing.
Answers
Here's an example implementation of the method that counts how many numbers are divisible by 3 in an int array, along with an overloaded method that finds how many numbers are divisible by 3 in a double array:
java
Copy code
public class DivisibleByThree {
public static int countDivisibleByThree(int[] arr) {
int count = 0;
for (int num : arr) {
if (num % 3 == 0) {
count++;
}
}
return count;
}
public static int countDivisibleByThree(double[] arr) {
int count = 0;
for (double num : arr) {
if (num % 3 == 0) {
count++;
}
}
return count;
}
public static void main(String[] args) {
int[] intArr = {3, 6, 9, 12, 15};
double[] doubleArr = {3.0, 6.0, 9.0, 12.0, 15.0};
int countInt = countDivisibleByThree(intArr);
int countDouble = countDivisibleByThree(doubleArr);
System.out.println("Number of integers divisible by 3: " + countInt);
System.out.println("Number of doubles divisible by 3: " + countDouble);
}
}
In the countDivisibleByThree method, we loop through each element in the array and check if it is divisible by 3. If it is, we increment the count variable. The main method creates an integer array and a double array, and then calls the two versions of the countDivisibleByThree method to find how many numbers in each array are divisible by 3. Finally, it prints out the results.
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WHAT DOES THE SCRATCH CODE BELOW DO?
Answers
rotate object while holding the shift key. what does it do?
Answers
Answer:
It rotates it 45 degrees in a direction
num = int(input("Enter a number: "))
num = num % 4
if (num == 1):
print ("A")
elif (num == 2):
print ("B")
elif (num == 3):
print ("C")
elif (num == 4):
print ("D")
else:
print ("E")
If the user enters 5 what is output? _____________
Answers
So, 5 is intered.
Line 1: num will recieve the integer 5
Line 2: Blank
Line 3: num will recieve 1, wich is the remainer of the division of 5 by 4.
Line 4: will return true, since num is indeed equal to 1.
Line 5: Will print "A"
Line 6: Will return false
Line 7: Gets jumped
Line 8: Will return false
Line 9: Gets jumped
Line 10: Will return false
Line 11: Gets jumped
Line 12: Will return false
Line 13: Gets jumped
The only OUTPUT is "A".