In an earlier assignment you modeled an inheritance hierarchy for dog and cat pets. You can reuse the code for that hierarchy in this assignment. Write a program that prompts the user to enter data (name, weight, age) for several Dog and Cat objects and stores the objects in an array list. The program should display the attributes for each object in the list, and then calculate and display the average age of all pets in the list using a method as indicated below:
public static double calculateAverage( ArrayList list )
{
... provide missing code ...
}
previous code
chihuahua
public class Chihuahua extends Dog
{
public void bark()
{
System.out.println("Bow wow");
}
}
dog
public class Dog
{
private String name;
private double weight;
private int age;
public String getname(String n)
{
name = n;
return n;
}
public double getweight(double w)
{
weight = w;
return w;
}
public int getage(int a)
{
age = a;
return a;
}
public void bark()
{
}
}
import java.util.Scanner;
public class DogCatTest
{
public static void main( String [] args)
{
Scanner scan = new Scanner(System.in);
System.out.println("Enter name");
String name = scan.nextLine();
System.out.println("Enter weight");
double weight = scan.nextDouble();
System.out.println("Enter age");
int age = scan.nextInt();
Dog [] dogCollection = { new Chihuahua(), new GoldenRetriever()};
for( int i = 0; i < dogCollection.length; i++ )
dogCollection[ i ].getname(name);
System.out.println(name);
for( int i = 0; i < dogCollection.length; i++ )
dogCollection[ i ].getweight(weight);
System.out.println(weight);
for( int i = 0; i < dogCollection.length; i++ )
dogCollection[ i ].getage(age);
System.out.println(age);
for( int i = 0; i < dogCollection.length; i++ )
dogCollection[ i ].bark();
System.out.println("Enter name");
String cname = scan.nextLine();
System.out.println("Enter weight");
double cweight = scan.nextDouble();
System.out.println("Enter age");
int cage = scan.nextInt();
Cat1 [] catCollection = { new SiameseCat(), new SiberianCat() };
for( int i = 0; i < catCollection.length; i++ )
catCollection[ i ].getname(cname);
System.out.println(cname);
for( int i = 0; i < catCollection.length; i++ )
catCollection[ i ].getweight(cweight);
System.out.println(cweight);
for( int i = 0; i < catCollection.length; i++ )
catCollection[ i ].getage(cage);
System.out.println(cage);
for( int i = 0; i < catCollection.length; i++ )
catCollection[ i ].meow();
}
}
public class GoldenRetriever extends Dog
{
public void bark()
{
System.out.println("Bow wow");
}
}
public class SiameseCat extends Cat1
{
public void meow()
{
System.out.println("Meow");
}
}
public class SiberianCat extends Cat1
{
public void meow()
{
System.out.println("Meow");
}
}
public class Cat1
{
private String name;
private double weight;
private int age;
public String getname(String n)
{
name = n;
return n;
}
public double getweight(double w)
{
weight = w;
return w;
}
public int getage(int a)
{
age = a;
return a;
}
public void meow()
{
}
}
Answers
Java program that shows the use of inheritance hierarchy, the code reuses the attributes of the class objects.
Importance of applying inheritance:In this case of pets (dogs and cats), applying inheritance allows a much shorter and more structured code. Also, reusable since we can add classes of other pets such as birds, rabbits, etc., all of them also belonging to the Pet superclass.
Reserved words in a java code that enforces inheritance:extendsprotectedSuperHere is an example:
Java codeimport java. io.*;
import java.util.ArrayList;
import java.io.BufferedReader;
public class Main
{
// ArrayList of Pet objetspublic static ArrayList < Pets > arraypets = new ArrayList < Pets > ();
public static void main (String args[]) throws IOException
{
BufferedReader data =
new BufferedReader (new InputStreamReader (System. in));
//Define variablesString aws;
String str;
double w;
String n;
int a;
double average;
do
{
//Data entry System.out.println ("Pet species? ");System.out.println ("(1) Cat ");
System.out.println ("(2) Dog ");
aws = data.readLine ();
System.out.print ("Enter name: ");
n = data.readLine ();
System.out.print ("Enter weight: ");
str = data.readLine ();
w = Double.valueOf (str);
System.out.print ("Enter age: ");
str = data.readLine ();
a = Integer.valueOf (str);
if (aws.equals ("1"))
{
Cat cat = new Cat (n, w, a);
arraypets.add (cat);
average = cat.averageAges (a);
}
else
{
Dog dog = new Dog (n, w, a);
arraypets.add (dog);
average = dog.averageAges (a);
}
System.out.print ("Enter more data? (y/n)");
aws = data.readLine ();
aws = aws.toLowerCase ();
}
while (!aws.equals ("n"));
//Calculate average of pets ageaverage = average / arraypets.size ();
average = Math.round (average * 100.0) / 100.0;
// OutputSystem.out.println ("Attributes for each object in the list: ");
for (Pets arraypet:arraypets)
{
System.out.println (arraypet);
}
System.out.println ("Number of pets: " + arraypets.size ());
System.out.println ("Average age of all pets in the list: " + average);
}
}
class Pets
{
protected String Name;
protected double Weight;
protected int Age;
public Pets ()
{
}
public Pets (String name, double weight, int age)
{
this.Name = name;
this.Weight = weight;
this.Age = age;
}
//Returning values formatted by tostring methodpublic String toString ()
{
return "Nombre: " + this.Name + ", Peso: " + this.Weight + ", Edad: " +
this.Age;
}
public void CalculateAverage ()
{
}
}
class Dog extends Pets
{
public Dog ()
{
super ();
}
public Dog (String name, double weight, int age)
{
super (name, weight, age);
}
//Adding the ages of the pets double averageAges (double a){
a += a;
return a;
}
}
class Cat extends Pets
{
public Cat ()
{
super ();
}
public Cat (String name, double weight, int age)
{
super (name, weight, age);
}
//Adding the ages of the petsdouble averageAges (double a)
{
a += a;
return a;
}
}
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A user reports a laser jet printer is not printing properly. A technician prints a test page and notices the toner is smeared on the page. The technician confirms the toner cartridge is installed correctly and the paper in the tray is the right size. Which of the following printer components is the MOST likely cause of the problem
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A user reports a laserjet printer is not printing properly. A technician prints a test page and notices the toner is smeared on the page. The technician confirms the toner cartridge is installed correctly and the paper in the tray is the right size. Which of the following printer components is the MOST likely cause of the problem?
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Which of the following CSS3 properties configure the alignment of text within a table?
a. align
b. caption
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Answers
Text-align
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Accenture i one of everal hundred companie that ha igned on to the United Nation Global Compact (UNGC) Buine Ambition pledge
Answers
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Can anyone please answer this question?
What are the uses of a relational database?
Answers
Answer:
Explanation:
tool for storing various types of information that are related to each other in various ways. For example, a relational database for an online store might maintain customer data and maintain related information as well, such as their various addresses, wish lists, orders, etc.
To represent relationships, ________ are added to tables.
A. locking keys
B. value keys
C. entity keys
D. normalized keys
E. foreign keys
Answers
foreign keys, Tables are enhanced with foreign keys to represent relationships.
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You are working on a computer with a host name of nntp-9.BoutiqueHotel. What is the NETBIOS name of this computer
Answers
NetBIOS domain name: The DNS domain name is often the parent domain of the NetBIOS domain name. For instance, the NetBIOS domain name is contoso if the DNS domain name is contoso.com.
Windows 10: Where can I locate my NetBIOS name?You may verify NetBIOS and your Active Directory domain FQDN with a few straightforward command prompt commands. Information is seen when you type nbtstat -n. There will be numerous entries under Name, and one of the Group types will be NetBIOS.
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SQL is considered difficult to learn; its command set has a vocabulary of more than 300 words.
a. True
b. False
Answers
Answer:
Explanation:
a. True
SQL (Structured Query Language) is a programming language used to manage data in relational databases. While it is relatively easy to learn the basic concepts of SQL, it can become more challenging as you learn the more advanced concepts and try to write more complex queries.
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how to make the user input a word and a letter, and display the number of times the letter is in the number
Answers
Using while loops is the purpose of my code. The user-entered words and the number of letters in each word should be printed as the final result.
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How can I count the number of times a word appears in a Python string?The count() method can count how many times a substring appears in a longer string. The count() function in Python iterates across a string. The result is equal.
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You are purchasing a PC system that will be used as a file and print server in a small business. Which of the following hardware selection criteria is the MOST important for this system?
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RAID 1+0 array, 64-bit multi-core processor.
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A desktop computer does not have a lit link light on the back of the computer. Which of the following is the most likely reason for this
Answers
The desktop computer is not connected to a network cable, so there is no need for a link light.
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Which of the following can be described as an isolated guest operating system installed on top of a normal operating system?
Select one:
a. virtual machine
b. physical server
c. host computer
d. emulated PC
Answers
An isolated guest operating system that is put on top of a regular operating system is what is known as a virtual machine.
What advantages can virtual machines offer?
Data accessibility, sharing, backup, and recovery are made simple with the aid of virtual machine solutions, providing flexibility and mobility in company operations. This helps to ensure company continuity as well as the benefits of cooperation and enhanced productivity.
What are the workings of a virtual machine? It is what?
A computer file that mimics the operation of a real computer is called a virtual machine. Typically, these files are referred to as images. It can function as the entire computer experience for the user or operate in a window as a separate computing environment, typically using a different operating system.
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Which of the following is NOT a means used by an attacker to do reconnaissance on a network?
a. Smurf attack
b. DNS footprinting
c. TCP/IP Stack fingerprinting
d. Christmas tree attack
e. Banner grabbing
f. Port scan attack
Answers
Option A is corret, A Smurf attack is an attack where the attacker tries to flood the target with ICMP using spoofed ping messages. This creates a huge network traffic on victim’s network, making it work abnormally.
What is a smurf attack?Disabling computer networks is the goal of a Smurf assault, a sort of distributed denial of service (DDoS) attack. The Smurf malware achieves this by exploiting weaknesses in the Internet Control Message Protocol (ICMP) and the Internet Protocol (IP).
Why is it called a Smurf attack?The name refers to the idea of several, little attackers overpowering a much larger adversary (see Smurfs). Few networks are still subject to Smurf attacks since administrators may now render a network impervious to such misuse.
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___________ characters is the average character length that will appear on a mobile device for your email.
Answers
25 to 30 characters is the average character length that will appear on a mobile device for your email.
How much time is excessive for an email?The studies and guidance from industry professionals indicate that 125 words maximum is your best bet. However, you should limit it to between 75 and 100 words for optimum impact. This is not to mean that you must adhere to this guideline in every single instance for every email you send.
What is the ideal email character count?40–100 characters is the optimum length. Best practises: Keep in mind that some of your readers might open your emails on their mobile devices. By making your preheader text mobile-optimized, you can raise your open rates.
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To achieve server scalability, more servers may be added to a configuration and make use of:
Choose matching definition
1. Inbound packets are traversing the active firewall and return traffic is being sent through the passive firewall
2. load balancers
3. RAID
Clustering
Load balancing
Answers
To achieve server scalability, more servers may be added to a configuration and make use of: 2. load balancers
How does a load balancer operate?A load balancer serves as the "traffic cop" in front of your servers, distributing client requests among all servers equipped to handle them in a way that maximizes speed & capacity utilization and makes sure that no server is overloaded, which can result in performance degradation.
What is load balancing at Layer 4?Without needing to see the content of messages, Layer 4 load balancing controls traffic based on network metadata like protocols and application ports.
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write a program to calculate the sum of numbers 15and 10 and print the steps involved
Answers
Answer:
//In c++
#include<iostream>
using namespace std;
int main(){
int sum;
sum=15+10;
cout<<sum;
}
output: 25
Explanation:
Consider the following code segment. int[] nums = {10, 5, 8, 13}; for (int i : nums) { System.out.print(i + " "); } What is printed when this code segment is run?
Answers
Since the code section does not compile, the array newVals will be empty. A value that can be printed is not returned by the reset procedure.
What will happen to the program's output if the array's starting address is 65486?# Incorporate Stdio H void main () int arr [] 12 14 15 23 45; printf%U%U ARR &ARR);?
The array's base address is 65486, therefore arr, &arr points to the array's base address arr. As a result, the program's output is 65486, 65486.
How to use length () in C++ to determine an array's length?Thus, by simply dividing the array's size by the size each member of the same acquired, we can determine the total number.
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Jack wants to insert a Win/Loss sparkline in Excel. To do this, he can click on the cell he wants to insert a Sparkline in, then click Apps tab, select Win/Loss Sparkline from the Sparklines group and then click OK. (T/F)
Answers
In Excel, Jack wishes to add a Win/Loss sparkline. He may accomplish this by clicking in the cell where he wants to place the Sparkline, selecting the Apps tab, and then selecting the Given statement is True.
Where is the Sparklines group in Excel?
Simply click Sparklines on the Insert tab to choose the correct sparkline type. Due to your decision in step 1, you will notice that the first field in the Insert Sparklines dialog box is already populated.
The Sparklines crew where are they?
Follow these instructions to make a sparkline in Excel: Wherever you wish to add a sparkline, usually at the end of a row of data, choose a blank cell. the Sparklines group on the Insert tab.
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A directory includes the files a.py, b.py, and c.txt. Which command will copy the two files ending in .py to the /tmp/ directory?
A. cp !!.py /tmp/
B. cp *.py /tmp/
C. cp. \.py /tmp/
D. cp #.py /tmp/
E. cp $?.py /tmp/
Answers
The command that will copy the two files ending in .py to the /tmp/ directory is B. cp *.py /tmp/. The command cp !!.py /tmp/ uses the !! history substitution, it means that it will copy the last command which is not in this case the files that ends with .py, it could be any command.
The command cp. \.py /tmp/ it's not a valid command because cp. is not a valid option and \.py is not a valid file extension, it will return an error. the command cp #.py /tmp/ doesn't copy the files that ends with .py because # is used to reference the command number in history not the files, it will return an error. The command cp $?.py /tmp/ doesn't copy the files that ends with .py because $? is used to reference the exit status of the last command, it will return an error.
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URGENT: What questions would you ask a USER when in a requirements-gathering session? Multiple answers may be selected.
1. Are there any websites that you like or dislike?
2. What key information do you expect to find on the site?
3. What kind of security would you like to be implemented for the transactions you might do?
4. What might help you to navigate the sire?
Answers
The questions would you ask a user when in a requirements-gathering session are:
2. What key information do you expect to find on the site?
3. What kind of security would you like to be implemented for the transactions you might do?
What is a requirements-gathering session?The act of developing a list of requirements to explain what a project is about and its aim is known as requirement gathering. Stakeholders, whether clients, employee users, consumers, or vendors, can provide insights.
Requirement gathering is frequently used to create project blueprints. Developers, for example, adjust requirements between iterations.
Therefore, the correct options are 2 and 3.
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WILL GIVE BRAINLIEST!!! Please help me create an image filter in Python, for my Code HS assignment. I have tried everything and nothing will work.
Answers
Below is an example of a custom image filter that inverts the colors of an image:
from PIL import Image
def custom_filter(image):
width, height = image.size
pixels = image.load()
for x in range(width):
for y in range(height):
r, g, b = pixels[x, y]
pixels[x, y] = (255-r, 255-g, 255-b)
return image
# Usage example
original_image = Image.open("example.")
inverted_image = custom_filter(original_image)
inverted_image.save("inverted_example.")
What is the Image Filter about?The above filter uses the Python Imaging Library (PIL) to open an image file, iterate through each pixel, and invert the red, green, and blue color channels by subtracting each channel's value from 255. The resulting image will have inverted colors, like a negative film.
Therefore, You can use this as a starting point and experiment with different ways of modifying the pixels to create your own unique filter. Some ideas to try:
Modifying only a specific color channel in each pixelSwapping color channels in each pixelModifying pixels based on their brightness or saturationModifying pixels based on the pixels around them (e.g. blur, sharpen)Combining multiple modifications togetherLearn more about Filter from
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See transcribed text below
Create an Image Filter
In this project, you can pair up with a partner to develop a novel image filter that can be applied to any digital image of your choosing! You will describe your image filter, your development process, and embed your image filter along with its description on your personal portfolio website.
YOUR TASK:
Fill in the function custom_filter that takes in an Image as a parameter, and modifies the pixels in the image in some way to create a new image, then returns that modified Image!
Make your filter unique. Experiment with different ways of modifying each pixel in the image.
Here are some questions to help you brainstorm your custom filter:
• What happens if you only modify one specific color channel in each pixel (red, blue, or green)? • What happens if you swap color channels in each pixel?
• What happens if you only modify pixels if they have a certain amount of red, blue, or green? • What happens if you modify a pixel based on the pixels around it?
Have fun!
Which term is used to describe the overall structure the OS uses to name, store, and organize files on a drive
Answers
The term 'File System' is used to describe the overall structure the operating system uses to name, organize, and store files on a drive
An integral part of an operating system (OS) is known as a File System. A File System is a data structure that name, organize, and store data and information on storage devices ( such as hard drives, floppy disc, etc.), making them retrievable easily. FaT32 and NTFS are examples of file systems of operating systems. Different operating systems use different file systems, but all have similar features. Microsoft Windows is always installed on a disk volume that uses the NTFS file system.
Thus, the overall structure that an operating system uses to name, organize, and store files on a disk is called File System.
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Perfective maintenance usually is cost effective ____ the system's operational life.
A) early in
B) during the middle of
C) late in
D) all of the above
Answers
In the middle of the system's operational life, perfective maintenance is typically cost-effective.
Which kind of maintenance improves an existing system?An operating system receives improvements through adaptive maintenance, making it simpler to utilize the system. Contrary to corrective maintenance, adaptive maintenance is less urgent since business and technological changes may take time to materialize.
What is the procedure for managing modifications to the system requirements while the software is being developed?The Software Development Life Cycle (SDLC) is a procedure used in software engineering to systematically manage, coordinate, and regulate changes made to documents, codes, and other entities.
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To change rows for which a specific condition is true, use the ____ command
a. CHANGE b. MODIFY c. UPDATE d. ALTER
Answers
Use the update command to modify any rows for which a specified condition is true. As a result, choice (c) is the appropriate response to the question.
In what command are the rows modified?The existing records in a table can be changed using the SQL UPDATE query. To only update the chosen rows rather than all the data, we can use the WHERE clause with the UPDATE query.
What command should I use to change the data in a table?ALTER is a Data Definition Language (DDL) statement and a SQL command used in Relational DBMS. ALTER can be used to modify the database's table's structure (like add, delete, drop indexes, columns, and constraints, modify the attributes of the tables in the database).
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Elias wants to name his data in an Excel file. Each column of his data begins with a label. He follows these steps in order to create a name from labels.
1. Select the Formula tab.
2. Highlight any cell that includes the label.
3. In the Defined Names group, select “Create from Selection.”
4. Select “Top row” in the Create Names from Selection pop-up box.
Which step is incorrect?
Step 1: The Data tab should be selected since it contains the Defined Names section.
Step 2: The entire data range must be selected to create names from labels.
Step 3: “Create from Selection” should be selected in the Data Tools group.
Step 4: “Top column,” not “Top row,” should be selected in the pop-up box.
Answers
According to the scenario, the incorrect step is the top column,” not “Top row,” which should be selected in the pop-up box. Thus, the correct option for this question is D.
How do you name data in Excel?Select the range you want to name, including the row or column labels. Select Formulas. Create from Selection. In the Create Names from Selection dialog box, designate the location that contains the labels by selecting the Top row, Left column, Bottom row, or Right column check box. Select ok.
The Name Box in Excel is the fastest way to create a named range: -Select a cell or a range of cells that you want to name. -Type a name into the Name Box. -Press the Enter key.
Select the range you want to name, including the row or column labels. Click Formulas then create from Selection.
In the Create Names from the selection dialog box, select the checkbox (es) depending on the location of your row/column header. Click OK.
Therefore, the incorrect step is the top column,” not “Top row,” which should be selected in the pop-up box. Thus, the correct option for this question is D.
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True or False: A base register is used to transform physical addresses (generated by the program) into virtual addresses.
Answers
False, a base register is not employed to convert physically generated addresses into virtual addresses.
How does the base & bounds method translate virtual memory addresses?Each memory reference's virtual address and bound register are checked, and the result is added to the base register to create the physical address. An operating system trap is set off by a bound violation. The bound register appears to control the extent of a wholly private memory that is shared by all processes.
In an operating system, what does address translation mean?Translation of addresses The system converts the logical address into a physical address and creates an entry in the page table when allocating a frame to any page. This entry will be used throughout the execution of the application.
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Consider the following correct implementation of the selection sort algorithm public static void selectionsort(int[] elements) for (int j = 0; j < elements.length - 1; j++) { int minIndex = 1; for (int k = 1 + 1; k < elements.length; k++) { if (elements[k] < elements[minIndex]) minIndex - k; } > if (1 minIndex) int temp = elements[i]; elements - elements[minIndex); elements[minIndex] - temp; // Line 19 The following declaration and method call appear in a method in the same class as selectionsort. int[] arr - (9, 8, 7, 6, 5): selectionsort(arr); How many times is the statement elements[minIndex] - temp: in line 19 of the method executed as a result of the call to selectionsort The following declaration and method call appear in a method in the same class as selectionsort. int arr - 19, 8, 7, 6, 5): selectionsort(arr); How many times is the statement elements[minIndex] = temp: in line 19 of the method executed as a result of the call to selectionsort? 2 3 D 4 5
Answers
In line 19 the method executed as a result of the call to selection sort is 4. Option E is correct.
[5, 10, 2, 1, 12]
iteration 1:
Line 11 is executed 2
iteration 2:
Line 11 is executed 1
iteration 3:
Line 11 is executed 1
iteration 4:
Line 11 is executed 0
Line 11 is executed a total of 2+1+1 = 4 times
Answer: 4
The access specifier public indicates that the method can be accessed by anyone static. In this case, accessing static members is not reliant on the object. This indicates that the method returns nothing or void.
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You have configured a wireless access point to create a small network. For security, you have disabled SSID broadcast. From a client computer, you try to browse to find the access point. You see some other wireless networks in the area, but cannot see your network. What should you do
Answers
Create a profile on the wireless client and try to browse from a client computer to the access point. You notice a few additional wireless networks.
How do you set up a wireless access point so that a wireless client can connect to it?You can use a serial cable to connect a laptop or PC to the wireless access point's console port in order to configure the access point for your client. You can see access point setup panels using terminal software and modify particular settings, including radio channel and transmit power.
Which of the above items can be turned off to assist block access to a wireless network?Utilizing MAC address filtering, turning down DHCP, and deactivating SSID broadcast all aid in limiting illegal access to wireless networks.
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Which of the following is not an aggregate function that can be applied in a total row?
a. MAX
b. AVERAGE
c. COUNT
d. VLOOKUP
Answers
VLOOKUP is not a aggregation function that can be applied in a total row. Correct option is 'd' .
Aggregate functions perform calculations on a set of values and return a single value. This function ignores null values. Often used in the GROUP BY clause of SELECT statements.
All aggregate functions are deterministic. That is, aggregate functions return the same value each time they are called with a particular set of input values.
SQL does not have all as a built-in aggregate function. Average is used to find the average, MAX is used to find the maximum value and count is used to COUNT the number of values.
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There is no aggregation function in VLOOKUP.
A single value is returned by aggregate functions after they have performed calculations on a set of values. Null values are ignored by this function. frequently used the SELECT statements' GROUP BY clause.
They are all deterministic aggregate functions. In other words, when an aggregate function is run with a specific set of input values, it always returns the same result.
All is not a built-in aggregate function in SQL. The terms average, max, and count are used to determine the average, max, the maximum value, and count, the number of values.
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TRUE OR FALSE : with pointer variables you can access, but you cannot modify, data in other variables.
Answers
True, with pointer variables you can access, but you cannot modify, data in other variables.
Which regarding a pointer variable is true?
A pointer variable, also referred to as a pointer or just a pointer, functions similarly to other variables that can hold data. A pointer saves a memory address instead of a value like a conventional variable would (such as an int, double, or char). Similar to a regular variable, pointers must be declared before they may be utilized.
Why not use variables instead of pointers?
In essence, a pointer can be used to point to any variable of the same type (e.g. any integer, double, char, etc.).
The values of numerous distinct variables of the same type can be updated or changed using this method. Using pointers speeds up execution as well. More quickly can be accessed memory.
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