The remove() method in the Queue interface ________.
A. retrieves, but does not remove, the head of this queue, returning null if this queue is empty
B. retrieves and removes the head of this queue, or null if this queue is empty
C. retrieves, but does not remove, the head of this queue, throwing an exception if this queue is empty
D. retrieves and removes the head of this queue and throws an exception if this queue is empty
Answer:D. retrieves and removes the head of this queue and throws an exception if this queue is empty
Explanation:In Java, the Queue interface is found in the java.util package and inherits from the Collection interface. It is used to store elements which are processed in the order in which they are inserted. This means that the first element will be processed first.
The Queue interface has many methods. Some of them are;
i. add(): allows elements to be added to the queue.
ii. remove(): retrieves and removes elements from the head of the queue. The head of the queue points to the first element of the queue. If the queue is empty, the remove() method throws an exception called the NoSuchElementException
iii. poll(): retrieves and removes the element at the head of the queue. Unlike the remove() method, if the queue is empty, a null is returned.
iv. peek(): retrieves but does not remove the element at the head of the queue. Just like the poll() method, a null is returned if the queue is empty.
What is a benefit of using a client/server network?
Cheap to maintain
Easy to install
Has a central, powerful computer
Unable to share files
Answer:
Has a central powerful computer
Explanation:
When operating a client - server network, a certain access mediun is created such that clients can access information, materials and services from a central computer, this poses great advantage in the area of security and control. Clients would be able to gain access from this central computer using either a local or wide area network. The accessibility provided through this powerful, central computer allows the the network to monitor what actions are being performed and make appropriate restrictions on the network, hence, preventing the invasion of malware and viruses. Hence, the central control is a great feature of a client - server network.
True or False: Microsoft Publisher allows you to click and drag an element anywhere on the page.
Answer:
True
Explanation:
State two pieces of information that need to be labeled on the idea development sketch. 1 .________________________________________________. 2 .___________________________________________.
Answer:
Design drawings should show details on layout, measurements, plan, cross-sectional and vertical profiles. This information is prepared as scale drawings of the works to be constructed. they are legible they include all information from previous revisions and updates.
Explanation:
To prevent certain columns from being displayed when printing a worksheet, _______ the columns.
erase
hide
highlight
remove
You provide desktop support for a small company. The company has two locations in the same city, but they are several miles away. You get a call from a user who is having problems installing a new device. You try to tell the user how to update the driver for the device over the phone, but he is having a hard time understanding your directions and is becoming frustrated.
What should you do?
A. Tell the user to wait until you are scheduled to be in that location.
B. Escalate the call to another technician or your supervisor.
C. Drive to the other location as soon as possible and update the driver.
D. Establish a Remote Desktop connection and update the driver.
Answer:
The answer is "Option D".
Explanation:
It is a desktop platform that helps a "client" computer can join from a remote location to a "host" computer. Clients can then manage and then use apps and files anywhere on network protocols.
This technology enables users to link from the remote location to a specific machine as if they were sitting beside it. Once this connection is established, users can carry out a variety of tasks as if they actually use the computer directly.
A small business utilizes a SOHO router and wishes to secure its existing wireless infrastructure. The business has fewer than ten devices, which are a mixture of old and new machines. Due to the varying ages of the machines, the latest wireless encryption methods may not be supported on all devices. Which of the following would be the MOST cost-effective method to add a layer of security while allowing all machines to connect?
A. MAC filtering
B. 802.1X
C. WPA2
D. EAP-FAST
Answer:
C
Explanation:
WPA2 builds on its predecessor, WPA, and is specifically designed to meet the most demanding enterprise security needs. ... Furthermore, because WPA2 is backwards- compatible with WPA, organizations that have already implemented the WPA standard can migrate to WPA2 at their own pace.
write an algorithm to find perimeter of circle
Answer:
Explanation:
Algorithm:
step 1 : Start
step 2 : Read r
step 3 : POC = 2*22/7 *r POC = perimeter of circle
step 4 : display POC
step 5 : Stop
17.35 ma of current is flowing though a brown-red-brown resistor,what is v
Answer:
2.1V
Explanation:
brown-red-brown = 120Ω
V = I·R = 17.35 · 120 = 2.082V
However, the tolerance of the resistor is at least 10%, so you can't express the voltage that accurate.
A Python keyword ______________.
can be user defined
cannot be used outside of its intended purpose
can only be used in the comments section
can be used anywhere in a Python program
Answer:
cannot be used outside of its intended purpose.
Explanation:
In many programming languages, keywords are special and reserved words that are used for specific and specified purposes. They have special meanings and cannot be used outside their intended purposes.
Keywords cannot be used as variable names, identifiers or functions.
In Python, some of such keywords include;
i. True
ii. False
iii. for
iv. while
v. break
vi. continue
vii. if
viii. else
ix. def
x. pass
write a program to enter RADIUS of a CIRCLE and PRINT AREA of TRIANGLE using Q Basic. (class 8)
Answer:
The program is as follows:
10 INPUT RADIUS, BASE, HEIGHT
20 CIRCLE = 3.142* RADIUS * RADIUS
30 TRIANGLE = 0.5* BASE * HEIGHT
40 PRINT CIRCLE
50 PRINT TRIANGLE
60 STOP
Explanation:
The program description doesn't tally;
In other words, it is impossible to calculate the area of a triangle using the radius of a circle.
So, I designed the program to get input for radius, base and height.
Get input for radius, base and height
10 INPUT RADIUS, BASE, HEIGHT
Calculate area of circle
20 CIRCLE = 3.142* RADIUS * RADIUS
Calculate area of triangle
30 TRIANGLE = 0.5* BASE * HEIGHT
Print area of circle
40 PRINT CIRCLE
Print area of triangle
50 PRINT TRIANGLE
End of program
60 STOP
Which is an example of a table style option?
O banded columns
O shading
O borders
O pen color
PLEASE HELP ASAP
Which is an example of a table style option?
O banded columns ✅
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what is the basic unit of measuring storage capacity of computer?
Answer:
All data are stored on 1s and 0s computers (bits). We explain how much data we store using conditions such as kilobytes and megabytes.
Explanation:
Storage devicesAll are stored in 1s and 0s on a computer. One of only 1 0 is called 'bit' in a computer. It takes 8 1s and 0s if we save a character in a computer, so we could say it needs 8 bits to store a character.
Computer and memory storage is frequently measured in megabytes and gigabytes (GB). A medium-sized novel includes approximately 1 MB of information. One MB is 1024 kilobytes, not a million bytes, or 1,048,576 bytes (1024x1024).
Similarly 1 GB is 1.024 MB (1024x1024x1024) bytes, or 1.073.741.824 bytes.
it is used to hold screws, jumpers, fasteners, and other small parts and prevent them from getting mixed together
Answer:
Cable ties
Explanation:
Used to bundle cables neatly inside and outside of a computer. It is used to hold screws, jumpers, fasteners, and other small parts and prevent them from getting mixed together.
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[tex]\boxed{Parts\: organizer}[/tex] is used to hold screws, jumpers, fasteners, and other small parts and prevent them from getting mixed together.
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Investigate the many ways that hardware and software can cause an interrupt to occur. Are ALL interrupts treated equally or do some have priority over others?
Answer:
Following are the responses to the given question:
Explanation:
This list is based mostly on the processor. Then you'll be ordered. An interrupt of a particular cable (wire) is produced for PC-ish CPUs (IRQ 0 - 31 for some intel processors). The bigger challenge is a lower number.
Strange factors have included a system clock, power business, 0, some reserved for use by CPU testing, serial/parallel/... ports and also some terminated/error/state/new devices requests device Thus a key touch on the keyboards could create an interrupt that was direct on old devices.
can you plz answer me from the photo
What are the uses of DVD Ram
Answer:
Like ordinary random access memory (RAM), it can be repeatedly read, written to, and erased. Intended mostly for removable computer storage, DVD-RAM provides the capabilities of Rewriteable CD (CD-RW) - users can run programs from the discs, copy files to them and rewrite or delete them.
explain why the computer is powerful working tool???
Answer:
here ya go
Explanation:
A computer is a powerful tool because it is able to perform the information processing cycle operations (input, process, output, and storage) with amazing speed, reliability, and accuracy; store huge amounts of data and information; and communicate with other computers.
help,any question answer
Answer:
true
false
true
true
Explanation:
I took the paper
The cultivation in mountain areas, with their scattered plots of usable land at various altitudes with different climates, landscapes and little margin for mechanization, are managed by family farms in the most efficient and effective way.
Answer:
Mountain farming
Explanation:
Mountain farming is done in hilly areas of the mountains. It is mainly family farming. The mountain farming is mainly done in the mountains where the paddy fields are scattered and the limited use of the usable lands are available.
It is cultivated in different types of climatic conditions or landscapes with limited use of mechanization or machines. The mountain farming is maintained by the family farms in an effective way.
For what purpose do the hackers create the zombies army?
A. DDoS Attacks
B. DoS Attacks
C. Warm Attacks
Answer:
A. DDoS Attacks
Explanation:
A zombie, in computer terminology, is a hacker, computer worm, trojan horse, or virus compromised internet connected computer, which can be remotely directed to perform malicious tasks
E-mail spams and denial-of-service, DoS attacks are spread and launched by botnets of zombie computers
Botnets which are also known as "zombie army", are used by hackers mainly for spam and distributed-denial-of-service, DDoS, attacks
While a DoS attack involves one machine, while a DDoS attack consist of multiple computing devices and machines
A botherder is the originator of a botnet and common botnets include Mr Black. Pushdo, and cyclone
Name the function for output in python.
Answer:
We use the print() function to output data to the standard output device (screen). We can also output data to a file, but this will be discussed later. An example of its use is given below.
Answer:print()
Explanation:As said above. Print is what we use in python (:
A current divider is to be designed using a 2mA DC current source and 1K resistors, the specification that the current is 1.5mA.
Answer:
The solution of the given query is described below throughout the explanation segment.
Explanation:
Given:
DC current,
= 2mA
Resistors,
= 1K
According to the question,
⇒ [tex]i=\frac{(1K+1K+1K)\times 2mA}{1K+1K+1K+1K}[/tex]
⇒ [tex]= \frac{3}{4}\times2mA[/tex]
⇒ [tex]=1.5mA[/tex]
I copied my friend's homework... give me some excuses to get out of it!!
Answer:
Tell the teacher that you will pee in her coffee cup if they don't forget about what you did
Explanation:
Answer:
Explanation:
Depends on the homework, but
"We worked together on it and came to similar conclusions."
"We checked answers with each other when we finished to make sure we got the problems correct and did the problems correctly."
The size (number of bytes) of a structure-type variable can be changed by the following factors. Select all that apply. Group of answer choices changing the orders of the members in the structure. adding a member into the structure. changing an int-type variable to a pointer-type variable. changing the computer from a 32-bit to a 64-bit processor.
Answer:
A, B, and D
Explanation:
Considering the available options, the size (number of bytes) of a structure-type variable can be changed by the following factors:
A. changing the orders of the members in the structure.
B. adding a member into the structure.
D. changing the computer from a 32-bit to a 64-bit processor.
benefits of Internet as method of information transmission
Answer:
The Internet enables effective global communication around the world and has changed the way people socialize and consume media via social networks, and has facilitated teleworking, distance learning and e-learning. The Internet has given rise to new e-commerce companies and industries, and knocked out other traditional players, but also contributed to the development of the IT bubble and burst at the turn of the millennium. To counter piracy of music and movies over the internet, new streaming services have been developed since the 00's and cut out distribution lines. Web magazines and social media have competed with many traditional media, especially the local press, and reduced the labor market for journalists. Social media may have been a tool (but not a catalyst) for revolutions such as the Arab Spring and of significance for an explosive increase in the spread of fake news and misinformation since the 2000s. Social media is believed to have had an impact on election results, but it is debatable whether fake news has had it.
how to prevent water pollution
Answer:
Here is your answer
Explanation:
1. pick up litter and throw it away in a garbage can.
2. use environmentally household products such as washing powder, household cleaning agents
3. wash your car or outdoor equipment where it can flow to a gravel or grassed area instead of a street.
4. don't throw waste at ocean it will harm the animals and create tocsin.
_________________________ are people, places, and materials, either printed or non-printed, that can provide answers to inquiries.
Answer:
Information/knowledge resources
Explanation:
The process of looking for answers to questions that will lead to improved knowledge about a subject is known as an inquiry. The theories of enquiry includes abduction, induction, and deduction
An inquiry can provide the reasoning behind observation by making use of the theories of inquiry and sources that provide answers (information) about the (interrelated) events of the inquiry
Therefore, information and knowledge resources are the people, materials, and places, which can be in the printed, verbal, appearance form that have the capacity to proffer answers to inquiries
how is a trade off best described ?
dilema
compromise
demand
complication
What is Adobe Dreamweaver ? What is it used for ? Name and describe its major components and features in detail
Answer:
Part A
Adobe Dreamweaver is a computer application used for building websites and other types of web development, as well as mobile content development for both the intranet and the internet, on the Apple OS X and Windows Operating System Platforms
Part B
Adobe Dreamweaver is used for designing, building, and coding websites and mobile contents by developers and designers and by mobile content developers
Part C
i) Adobe Dreamweaver allows rapid flexible development of websites
The simplified engine on which Adobe Dreamweaver is based makes it easy to adapt web standards including CSS, and HTML for personalized web projects, thereby aiding learning of the web standards and fast (timely) web development
ii) The time between starting development and deployment is shorter when using Adobe Dreamweaver due to the availability of customizable templates that serve wide range of user web interfaces, including e-commerce pages, newsletters, emails and blogs
iii) Building of websites that adapts to the screen size of the device from where the site is accessed is possible with Adobe Dreamweaver
Explanation:
A customer in a store is purchasing five items. Write a program that asks for the price of each item, and then displays the subtotal of the sale, the amount of sales tax, and the total. Assume the sales tax is 7 percent. Display all results, properly labeled, as numbers with two digits after the decimal point.
Answer:
Program approach:-
Using the header file.Using the standard namespace I/O.Define the main function.Display the enter price of 5 terms.Explanation:
Program:-
//header file
#include<iostream>
#include<iomanip>
//using namespace
using namespace std;
//main function
int main(){
const double SALES_TAX=0.07;
double subTotal=0,total=0,taxAmount = 0,x;
cout<<"Enter price of 5 items"<<endl;
for(int j=0;j<5;j++){
cin>>x;
subTotal += x;
}
taxAmount = subTotal * SALES_TAX;
total = taxAmount + subTotal;
cout<<fixed<<setprecision(2)<<endl;
cout<<"Sub total: "<<subTotal<<endl;
cout<<"Sales Tax: "<<taxAmount<<endl;
cout<<"Total: "<<total<<endl;
}