A hammer tool can only be used by one technician at a time to perform hitting. Accordingly, you have developed a Hammer class with a hit method. Objects of class Hammer are used to simulate different hammers, while threads are created to simulate users. Which situation needs to add the synchronized keyword to the hit method

Answers

Answer 1

Answer:

Explanation:

The synchronized keyword needs to be active on the hit method at any point where 2 or more threads (users) exists at any given moment. This is in order to prevent two or more users from trying to perform a hammer hit at the same time. This is what the synchronized keyword is used for. It prevents the more than one thread from calling the specific method at the same time. Instead it adds the action to a sequence so that the second thread calls the hit method only after the first thread's hit method finishes.


Related Questions

What was the main limitation of computer networking that the invention of the Robert website of the 1990s

Answers

Answer:

The TCP/IP protocol could only be used in universities, governments, and businesses. People around the world could not send data to one another.

Game Changer Technologies has four software teams. Each of them is developing four different examples of its new game app. Which software development methodology is used by the Game Changer teams

Answers

The software development methodology used by the Game Changer teams is called; Prototyping

We are given that;

- Game changer technologies has four software teams

- Each of the teams develops 4 different examples of the new game app.

Now, since each of them is developing four four different examples of its new game app, the method being used is called prototyping. This is because prototyping is referred to as the early approximation of the final system of a product whereby such a product is built, tested and rebuilt if required until an acceptable prototype is achieved.

When the acceptable prototype is gotten, then it will be used to develop its final game app.

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Which of the following is NOT an arithmetic operator?

Answers

Considering the available options, the choice that is NOT an arithmetic operator is "]."

What is Arithmetic Operator?

Arithmetic Operator is the term used in computer science to describe the mathematical function that takes two operands while making calculations.

Arithmetic Operators are generally used for arithmetic and sequential calculation.

Major Arithmetic Operators

+ (addition), - (subtraction), * (multiplication), / (division), % (modulo).++ Autoincrement−− Autodecrement

Hence, in this case, it is concluded that the correct answer is "]."

The available options are:

a.+

b.-

c. *

d. ]

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what is office course
how to learn office course

Answers

Answer:

It includes Word, to create, polish, and share documents; Excel, to analyze and visualize data; PowerPoint, to create, collaborate, and effectively present ideas; OneNote, to organize ideas into a digital notebook; Outlook, to organize email, coordinate schedules, and stay up to date with contacts; Access, to create .

Hope this helps you XD ✌️

how to count binary ? Help Better understand this question

Answers

Explanation:

For each row in the picture, you have to switch on some of the bits to create the number on the left.

Each bit has a value, a "weight" so to speak. By switching on the bit, you add that weight to the sum.

These "weights" are shown at the top row.

So to create 4, it's easy, you just switch on the '4' bit.

Same for 128, only one bit has to be switched on.

40 is a bit more involved, now you have to switch on 32 and 8, since 32+8 is 40.

For every number, there is exactly one combination of switched on bits to create that number. In the case of 40, the binary representation is:

00101000.

Provide your own examples of the following using Python lists. Create your own examples. Do not copy them from another source. Nested lists The “*” operator List slices The “+=” operator A list filter A list operation that is legal but does the "wrong" thing, not what the programmer expects Provide the Python code and output for your program and all your examples.

Answers

Lists are used in Python to hold multiple values in one variable

(a) Nested list

A nested list is simply a list of list; i.e. a list that contains another list.

It is also called a 2 dimensional list.

An example is:

nested_list = [[ 1, 2, 3, 4]  , [ 5, 6, 7]]

(b) The “*” operator

The "*" operator is used to calculate the product of numerical values.

An example is:

num1 = num2 * num3

List slices

This is used to get some parts of a list; it is done using the ":" sign

Take for instance, you want to get the elements from the 3rd to the 5th index of a list

An example is:

firstList = [1, 2 ,3, 4, 5, 6, 7]

secondList = firstList[2:5]

The “+=” operator

This is used to add and assign values to variables

An example is:

num1 = 5

num2 = 3

num2 += num1

A list filter

This is used to return some elements of a list based on certain condition called filter.

An example that prints the even elements of a list is:

firstList = [1, 2 ,3, 4, 5, 6, 7]

print(list(filter(lambda x: x % 2 == 0, firstList)))

A valid but wrong list operation

The following operation is to return a single list, but instead it returns as many lists as possible

def oneList(x, myList=[]):

   myList.append(x)

   print(myList)

oneList(3)

oneList(4)

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Write a description about this picture

Answers

Answer:

A cube which has holes in it, represented by circles and it has an oval/sphere on top of the figure

Explanation:

Answer: A Square with circular holes and a tall round circle/torus sticking out of the top circle hole in all there are 6 circular holes 1 square and 1 tall round circle/torus

Explanation:

Im sorry if this isnt what you meant if it isnt i can try again

Yvonne is matting a series of photos as an anniversary gift for her parents. She hopes that they will cherish this gift for years to come but is concerned because she can’t afford the really nice mat board. What is Yvonne MOST LIKELY worried about?

A.
that the mat will turn black

B.
that the mat will take over the picture

C.
that the mat will disintegrate

D.
that the mat will discolor and deteriorate

Answers

Answer:

That the mat will discolor and deteriorate

Explanation:

D

Yvonne will most likely worry that the mat will discolor and deteriorate. The correct option is D.

What is matting in photos?

Matting is a decorative border that surrounds the artwork. It is typically built of mat board, a type of board designed specifically for this purpose. After cutting the mat board to size, one or more holes (entries) are cut in the mat board to act as windows for displaying art.

Matting is the technique of separating an image's foreground and background components. Typically, the photos are of a frame or a video file. It adds a decorative edge to the print and a mechanism for hanging the photo.

Matting involves using a front or window mat to separate the image from the frame's glass and to give an extra border around the photo.

Therefore, the correct option is D. that the mat will discolor and deteriorate.

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a
2 A car is fitted with the latest GPS navigation system. This device is controlled
by an embedded system in the form of a microcontroller.
Describe the inputs needed by the embedded system and describe which
outputs you would expect it to produce.
b Since updates to the GPS device are required every six months, explain how
the device is updated without the need to take the car to the garage every six
months.

Answers

Answer:

It probaly connected to the internet in some way to resieve updates

Hope This Helps!!!

state the base of correct addition of 27 + 6 =34​

Answers

Answer:

9

Explanation:

lets do calculations with ONLY the rightmost digits, ie., 7 + 6 = 4, so we're ignoring the carry.

Then, following must be true as well:

7+5 = 3

7+4 = 2

7+3 = 1

7+2 = 0 <= this reveals our base 9

7+1 = 8

7+0 = 7

check image dont answer if you dont know please

Answers

Answer:

Explanation:

1-2nd option

2-1st option

3-last option

hope this helps!! have a good rest of ur day!! <3

what is the relationship between interrupt and buffer

Answers

Answer:

Operating systems have some code called an 'interrupt handler', which prioritises the interrupts and saves them in a queue. Buffers are used in computers as a temporary memory area, and they are essential in modern computers because hardware devices operate at much slower speeds than the processor.

You have just purchased a brand new Windows 8 computer. What should you do right away with the Administrator account?

Answers

The correct answer is:

Enable EFS for the account

Consider our authentication protocol 4.0, in which Alice authenticates herself to Bob, which we saw works well (i.e., we found no flaws in it.). Now suppose that at the same time that Alice authenticates herself to Bob, Bob must authenticate himself to Alice. Give a scenario by which Trudy, pretending to be Alice, can now authenticate herself to Bob as Alice.

Answers

According to protocol 4.0, the scenario can be defined in terms of Bob, Alice and Trudy as follows:

The communication is done between Bob and Alice only in whom they share a secret key KAB with each other. The Trudy is an intruder who wants to get the information that is being communicated between Alice and Bob. To do so, Trudy wants Bob to initiate the communication by authenticating herself her Alice. Thus, Trudy waits for the Bob to start in-order to make the Bob authenticate himself.

Here are the steps how the communication is done between the Bob and Trudy:

Step 1: Bob starts the communication by himself to other side and waits for the reply.

Step 2: Trudy starts to disguise as Alice herself and authenticate herself to Bob.

Step 3: After looking at the reply, Bob sends the nonce key to Trudy. At this step, still Trudy does not know the KAB(R) in-order to reply to Bob.

Step 4: At this point Trudy response to the step-1 while Bob still continuing to authentication. Trudy picks the nonce for the Bob to encrypt the message with the Bob sent nonce in the Step-3.

Step 5: Now Bob completes his own authentication to himself on the other side of encrypting the nonce he sent at step 4. Where, Trudy gets the nonce key KAB( R).

Step 6: Now, Trudy completes her authentication in responding to R that is sent by Bob in step 3. At this point, Trudy has responded properly, so Bob thinks that he is communicating with Alice(Trudy).

The actual scenario with respect to above steps, the communication is done as follows:

Bob: “I am Bob”

Trudy: “I am Alice”

Bob: “R”

Trudy: “R”

Bob: “KAB (R )” – Bob completes his authentication.

Trudy: Get the KAB (R ) – Trudy complete her authentication.

Thus, the communication is started between the Bob and Trudy instead of Bob and Alice according to protocol 4.0.

Buddys machine shop has a kiosk computer located in the lobby for customers to use. The kiosk computer has recently been updated to Windows 10 from Windows 7 and is not part of a domain. The local computer policy created for Windows 7 has been applied to Windows 10. This policy severely restricts the use of the computer, so that customers can only use the web browser.
Occasionally, an administrator needs to sign in to the kiosk computer to perform maintenance and update software. However, this is awkward because the administrator needs to disable settings in local policy be performing any task. Then, when the tasks are complete, the administrator needs to re-enable the settings in the local policy. Explain how this system can be improved upon.

Answers

If your PC's are in an Active Directory domain, you can leverage Active Directory Group Policies to deploy the appropriate settings. Be sure to include the below settings in your Group Policy for the user accounts and workstations that will be running as a Kiosk. After creating this Group Policy, you can test by running gpupdate /force and then restarting the PC.

User Configuration
Administrative Templates
Start Menu and Taskbar
Change Start Menu power button (enabled) - set to "Lock" (I know this sounds weird, but Windows 7 won't completely disable Logoff if the Start Menu power button is defaulting to the Logoff action).
Remove Logoff on the Start Menu (enabled)
Remove and prevent access to the Shut Down, Restart, Sleep and Hibernate commands (enabled)
System
Ctrl+Alt+Del Options
Remove Lock Computer (enabled)
Remove Logoff (enabled)
Computer Configuration
Administrative Templates
System
Logon
Hide entry points for Fast User Switching (enabled)
For Windows PCs not in a Domain Environment

If your PC's are not in an Active Directory domain, then you'll need to make the below changes manually at each Kiosk PC. Note that you may be able to automate the changes via the use of operating system imaging tools and local mandatory user profiles - leave a comment below if you have interest in those steps.

Login at each Kiosk PC using a user account that will ultimately be used to run the Kiosk desktop applications.
Launch the Windows Registry Editor (REGEDIT.EXE) and make the following changes to the registry (note that you may need to temporarily grant local Administrative access to your Kiosk user account to do this if it is already in a very locked down state)
HKEY_CURRENT_USER
SOFTWARE
Microsoft
Windows
CurrentVersion
Policies
Explorer

list 3 things needed in order to complete mail merge process.



pls help me!​

Answers

There are three documents that are involved in the mail merge process:

1- the main document
2- the data source
3- the merged document.

During boom times, which of the
following is true?
A. less tax revenue is being paid by businesses
B. less tax revenue is being paid by consumers
C. more tax revenue is being collected from businesses
and consumers
D. tax increases are causing unemployment and job
loss

Answers

During boom times, the option that was true is that less tax revenue is being paid by businesses.

How does the taxation system can boom a economy?

The use of taxation is one that affect incentives, as taxes can influence supply and demand factors.

Note that by lowering marginal tax rates on wages and salaries, can bring about the zeal for people to work more and earn more.

Therefore, During boom times, the option that was true is that less tax revenue is being paid by businesses.

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Filtering is a function of _____.

Answers

The answer is: switches.

Explanation:

Filtering is a function of switches.

Consider the following declaration:
String s = "cat";
Which of the following statements assigns the number of characters in s to k?

A. int k = s.length;
B. int k = s.length();
C. int k = s.size;
D. int k = s.size();

Consider the following declarations:
String s1 = "apple";
String s2 = "apple";
What is the result of s1.compareTo(s2)?

A. true
B. false
C. 0
D. 1

Consider the following declarations:
String s1 = "apple";
String s2 = "APPLE";
Which of the following expressions is true?

A. s1.equals(s2) && s1.equalsIgnoreCase(s2)
B. !s1.equals(s2) && s1.equalsIgnoreCase(s2)
C. s1.equals(s2) && !s1.equalsIgnoreCase(s2)
D. !s1.equals(s2) && !s1.equalsIgnoreCase(s2)

Answers

Answer:

B, C, B

Explanation:

According to my understanding of these questions, these are in Java.

For the first one, there is a built in function called .length() for a string, so it's answer B.

For the second one, this should come out as C, 0 since compareTo compares the ascii values of the characters.

The third one's answer should be B. s1.equals(s2) for characters that are caps and not caps comes out with false, so ! would negate it. s1.equalsIgnoreCase(s2) would come out as true, ignoring the cases of APPLE.

List the four types of computer cases

Answers

Answer:

full-tower, mid-tower, mini-tower, and SFF(Small Factor Form).

I hope it helps.

This is the answer. Hope it’s helpful

A user is following the instructions of a help desk technician and is attempting to launch System File Checker from the command-line interface. Each time the user types sfc /scannow and presses Enter, the utility fails to run, and an error appears stating the command must be run using an elevated command prompt.

Answers

The user must open the command-line interface using Run as administrator.


• R7.9 Write enhanced for loops for the following tasks.
a. Printing all elements of an array in a single row, separated by spaces.
b. Computing the maximum of all elements in an array.
2. Counting how many elements in an array are negative.

Answers

Answer:

a is the correct answer

Explanation:

correct me if I'm wrong hope it's help thanks

A hybrid data mart ________ data from a data warehouse as well as other data collection systems. It incorporates a top-down approach, end-user inputs, and enterprise-level integration. g

Answers

Answer:

Hybrid Data Marts

A hybrid data mart allows you to combine input from sources other than a data warehouse. This could be useful for many situations, especially when you need ad hoc integration, such as after a new group or product is added to the organization.

We can use a hybrid data mart to mix data from sources other than a data warehouse, and the further discussion can be defined as follows:

Hybrid Data Marts:

It could be useful in a variety of scenarios, particularly when informal integration is required, like when a new group or product is added to the organization.

We can use a hybrid data mart to combine data from various sources other than a data warehouse. It's a structure or access pattern that retrieves client-specific data in data warehouse environments. This data mart is a subset of a data warehouse that is typically focused on a particular business line or functional area.

Therefore, the final answer is "separates".

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Write a program that simulates applying a "boost" to a spaceship in a spaceship race game.
A spaceship makes progress by getting a "boost" value between 0 and 10. The boost value
is determined from generating a random number between 0 and 10. Assuming the starting
distance of the spaceship is 0, the program will output the boost value and the total
distance travelled by the spaceship after applying the boost. (Note: Two newlines are output
after the final output of the program).
When a random seed value of 2 is used, the output of the program will look like:
Boost: 6
Distance travelled: 6

Answers

Programming languages can be used to simulate several scenarios; in this case, the "boost"

The simulating program in C++ where comments are used to explain each line is as follows:

#include<iostream>

#include<cstdlib>

#include<ctime>

using namespace std;

int main() {

 // This sets the seed to time(0)

 srand(time(0));

 // This generates a random number between 0 and 10, to represent the boost

 int boost = rand()%10;

 // This prints the required outputs

 cout << "Boost: " << boost;

 cout << "\nDistance travelled: " << boost;

 return 0;

}

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state an application that would be better to write c++ than java and give a rationale for your answer

Answers

Microsoft Visual Studio is the best deal

Add comma(s) where needed, if needed.


My birthday October 31 2005 is on Halloween.


My birthday October 31 2005 is on Halloween. (no change)


My birthday October 31, 2005, is on Halloween.


My birthday October 31, 2005 is on Halloween.


My birthday, October 31, 2005, is on Halloween.

Answers

Answer:

My birthday, October 31, 2005, is on Halloween.

Explanation:

The correct option with commas is "My birthday, October 31, 2005, is on Halloween."

Why is this correct?

The revised sentence "My birthday, October 31, 2005, is on Halloween." correctly uses commas to separate the date from the year and to set off the date as an appositive.

This improves clarity and follows proper punctuation rules.

Hence,. The correct option with commas is "My birthday, October 31, 2005, is on Halloween."

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Write a program that generates 100 random numbers and keeps a count of how many of those random numbers are even and how many of them are odd.

Answers

Answer:

import random

numbers = []

even = 0

odd = 0

for i in range(100):

   numbers.append(random.randint(1, 200))

for i in range(100):

   if numbers[i] % 2 == 0:

       even += 1

   else:

       odd += 1

print("Even:", even)

print("Odd:", odd)

Explanation:

Gg ez.

write a short paragraph (three to four sentences) that explains how it works for computers and internet communications in relation to cybersecurity.

Answers

Answer:

Public and private keys form the basis for public key cryptography, also known as asymmetric cryptography. In public key cryptography, every public key corresponds to only one private key. Together, they are used to encrypt and decrypt messages. If you encode a message using a person’s public key, they can decode it using their matching private key.

Explanation:

Change up the wording.

how many MB are there in 1000 KB?

Answers

Answer:

1 megabyte

Explanation:

Ok so there should be 1

1. Import it into Eclipse. Open the file in Eclipse 2. Edit the file to add comments to identify the instance variables, constructors headings and method headings 3. Edit the file to build and add the UML in the Header comment of the code. You must do a very thorough job and be sure to pay attention to the details. 4. Save your Flower.java file. 5. Upload your updated Flower.java file here.package during_class_session;public class Flower{private String NameofFlower;private double PriceofFlower;public Flower() {this.setNameofFlower("No name yet");this.setPriceofFlower(0.0);}public Flower(String nameofFlower_initial, double priceofFlower_initial) {this.setNameofFlower(nameofFlower_initial);this.setPriceofFlower(priceofFlower_initial);}public String getNameofFlower() {return NameofFlower;}public void setNameofFlower(String nameofFlower) {NameofFlower = nameofFlower;}public double getPriceofFlower() {return PriceofFlower;}public void setPriceofFlower(double priceofFlower) {PriceofFlower = priceofFlower;}}

Answers

Answer:

/

Explanation:

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Find the slope of the line that passes through (-2, -44) and (-1, -70). I'll put this as random but you can answer it... ill give yall 10 points if yall do it! If disposable income increases, people will decide to ________ saving, the supply of loanable funds will ________ and the real interest rate will ________. Is a chair a frame structure what is an atom plz answer to get 10 points +brainliest Rewrite the expression as only multiplication and evaluate.21 - what is the value of 7 Which of these would make text on a slide difficult to read?Ohigh contrast between text and backgroundOlow contrast between text and backgroundO a sans serif fontO a large font when the presentation is in a large room Cooper Toy Company has designed a new toy that uses a spring that follows asinusoidal curve after you wind it up and start it. At t = 5 seconds, the end ofthe spring is at its highest point, 18 cm above the ground. Four seconds later,the spring is at its lowest point, which is 6 cm above the ground. Find anequation that will determine the height of the spring at any time t.a) Find the height of the spring after 26 seconds.b) Find the first time the height of the spring reaches 16 cm above the ground. 3rd Reasoning( at least two sentences) for does the influence of gravity extend out forever in space exploration What factors help blood move through veins? "After improving his diet, Carl felt better."Is it compound , complex, simple? The tools used to craft chairs in a furniture factory are an example of which factor of production? ASAP!!!a. entrepreneurshipb. laborc. capitald. land Find all solutions of cos()=1/2 on the interval [ What is the chemical formula for iron(ii) hydroxide? femc033-1. Jpgoh fe(oh)mc033-2. Jpg feohmc033-3. Jpg feoh. Which of the following correctly sequences the continuum from language family to dialect? Select the graph of the equation y + x + 3 = 0. the idea of popular sovereignty originated as a justification for 5 : 1/3 in its simplest form please help with this math question