how is a pointer different from a reference variable? and please give a code example.
Answers
A pointer is a variable that stores the memory address of another variable, while a reference variable is a variable that refers to another variable.
A pointer can be changed to point to a different variable, while a reference variable cannot be changed to refer to a different variable. A pointer can be null, while a reference variable cannot be null. A pointer can be used for pointer arithmetic, while a reference variable cannot be used for pointer arithmetic.
Here's an example of a pointer and a reference variable in C++: int x = 10; int* p = &x;// Pointerint& r = x;// Reference variable. In this example, p is a pointer that points to the memory address of x, while r is a reference variable that refers to x.
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Related Questions
Consider a non-rival and non-excludeable public good. The government decides whether or not to provide the good based upon a majority vote. If the good is provided all citizens pay an equal share of the cost. Evaluate the following two statements.
(i) The good WILL NOT be provided if it is NOT efficient to do so.
(ii) The good will be provided if it is efficient to do so.
a. Neither (i) nor (ii) is always true.
b. Only (i) is always true.
c. Only (ii) is always true.
d. Both (i) and (ii) are always true.
Answers
The correct answer is c. Only (ii) is always true.
In the given scenario, where the government decides whether or not to provide a non-rival and non-excludable public good based on a majority vote and equal cost sharing, statement (ii) is always true. If a public good is deemed efficient, meaning that its benefits exceed the costs, it will be provided because all citizens share the cost equally. Therefore, efficiency in the provision of the good guarantees its provision. On the other hand, statement (i) is not always true. Even if a public good is not efficient to provide, it can still be provided if the majority of voters choose to do so. The decision to provide the good is based on a majority vote, not solely on efficiency. Therefore, statement (i) does not hold in all cases.
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you can use ____ to convert two or more basic disks to dynamic disks
Answers
In Windows, you can use the Disk Management tool to convert basic disks to dynamic disks. Disk Management is a built-in Windows utility that allows users to manage hard disks, partitions, and volumes.
When you have two or more basic disks in Windows, you can use the Disk Management tool to convert them to dynamic disks. Converting a basic disk to a dynamic disk has a few benefits. First, you can create volumes that span multiple disks, which can help you make use of all the storage space you have. Second, you can use the Disk Management tool to create fault-tolerant volumes, such as mirrored volumes and striped volumes. Finally, dynamic disks can have more than four partitions, which can be useful if you need to create many partitions.
To convert two or more basic disks to dynamic disks, follow these steps:
1. Open Disk Management. You can do this by right-clicking on the Start button and selecting Disk Management from the menu that appears.
2. In Disk Management, locate the disks that you want to convert to dynamic disks.
3. Right-click on each basic disk and select Convert to Dynamic Disk.
4. Follow the prompts to complete the conversion process. Note that you may need to reboot your computer for the changes to take effect. When the conversion process is complete, you should see your disks listed as dynamic disks in Disk Management. You can then create volumes that span multiple disks or create fault-tolerant volumes as needed.
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if you're a business owner that wants to analyze how users arrive at your website and app, as well as the user journeys across both of these platforms, what should you use to generate insights?
Answers
If you are a business owner and want to analyze how users arrive at your app and website, as well as the user journeys over both of these platforms. You should use the Go-ogle Analytics tool to generate insights.
Go-ogle Analytics is a tool by which data is collected from your apps and websites in order to generate reports that provide you with useful insights into your business. The Go-ogle Analytics tool tracks your customer’s journey which not only helps you to gain valuable insights into the experiences of customers across the usage of sites but also facilitates you to discover key moments, and identify what works best for you, and your business.
Therefore, companies use Go-ogle Analytics tool to generate insights into journey of customers visiting their apps and website.
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Select all the ways in which business professionals might use a spreadsheet in their jobs.
editing graphics
creating a graph for a presentation
tracking financial information
organizing numeric data
conducting a query
making calculations
writing business letters
Answers
Answer:
By making calculation.
Explanation:
Because spreadsheet is a calculation type software.
write a html code to display the exact output in the picture
Answers
A HTML code to display the given text is given below:
<ul style=“list-style-type:Zero Hunger"/>
<ul style=“list-style-type:Gender Equality"/>
<ul style=“list-style-type:Women Empowerment"/>
<ul style=“list-style-type:No Poverty"/>
<ul style=“list-style-type:Life on Land"/>
<h1> Zero Hunger </h1>
<p>Sustainable Development........,.</p>
Hence, it can be seen that there is the use of the unordered list code in HTML to replicate the bullet list used and then the header and paragraph tag for the subsequent text.
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Select the correct answer. In which item is energy stored in the form of gravitational potential energy? A. a slice of bread B. a compressed spring C. an apple on a tree D. a stretched bow string
Answers
Answer:
C. an apple on a tree
Explanation:
Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;
a. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.
b. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.
Mathematically, gravitational potential energy is given by the formula;
\( G.P.E = mgh\)
Where;
G.P.E represents gravitational potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per seconds square.
h represents the height measured in meters.
In an apple on a tree, energy is stored in the form of gravitational potential energy.
Which is NOT a benefit of using visual aids?
Answers
Increase time spent looking at an image is NOT a benefit of using visual aids.
HELP ME PLEASE ASAP
Which file format would be best for transferring contacts from one program to another?
1. The .cnt format
2. The .exl format
3. The .pst format
4. The .csv format
Answers
Answer:
csv
Explanation:
got it right on edge
Answer:
csv and pst
Explanation:
Which 2 tools are useful to remote employees and coworkers.
Answers
which of the following energy conversions occurs inside a battery?
Answers
Answer:
chemical energy is changed into electrical energy.
Explanation:
to gain a deeper understanding of a text, students should
Answers
Answer:
Should explain what they learned, be able to explain what is happening in great detail, and if its an informational text, then they should use what they learn and apply it in real life.
Explanation:
If we use the square wave to transmit digital data (0s and 1s), what will be the data rate. Note data rate is the bits per second. (if two bits contain in one period) 2. Then, if we use the first three components to represent square wave, what is the bandwidth? (Refer to lecture) 3. Consider a noiseless channel with a bandwidth of 3000 Hz transmitting a signal with two signal levels. What can be the maximum bit rate?
Answers
After thoroughly evaluating a supplier, many organizations summarize evaluations using a supplier ____ matrix-a type of weighted scoring model.
Answers
After thoroughly evaluating a supplier, many organizations summarize evaluations using a supplier evaluation matrix-a type of weighted scoring model.
What is evaluation matrix?This is a tool, used to measure proposals, submitted by suppliers. It is basically meant to rank proposals based on defined criteria so that the best can be chosen.
In evaluation matrix, a score is assigned to each criteria that was considered under different categories and then the supplier with the highest score is selected to do business with.
Using evaluation matrix assess the suitability of suppliers to the business, who can work with the business for a long time hence, an essential tool for planning and organizing an evaluation.
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Create a query, using the football database that will show those teams who were shut out or had a score of 0. include in the result set the game date, home team, visitor team winning team and the score.
Answers
When there is a goal, my SQL statement works. In some games, a side will not score or concede a goal, hence there will be no 'Goal' item in the action column.
For example, Team A has played 5 games and has scored 4 goals, 2 goals, 0 goals, 0 goals, and 1 goals. It calculates the average as 7/3 when it should be 7/5 because it does not see games without goals.
def averageFor(team_id, action):
cur.execute("""SELECT count(espn.actions.action_name)/count(DISTINCT espn.game_details.game_id)
FROM espn.game_details
INNER JOIN espn.actions
ON espn.game_details.game_id = espn.actions.game_id
WHERE (home_team = (%s) OR away_team = (%s))
AND action_name = (%s)
AND espn.actions.team_id = (%s)""", (team_id, team_id, action, team_id))
data = cur.fetchall()
return data
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Which line indicates that robots plan?
Phil, an AI scientist, loves to collect as well as create robots that make his life easier. When introduced to a new place, one of his robots calculates the area of that location before beginning its tasks. His robot vacuum cleaner moves toward dusty places and cleans them up. The air conditioner in his house adjusts the cooling according to the change in temperature. Another robot clears the table after Phil has breakfast.
Will mark brainliest for correct answer, if answered 10-30 minutes after post.
Answers
Note that the line that indicates that robots plan is ""One of his robots calculates the area of that location before beginning its tasks"
Why are robots important?Because robots can operate in hazardous areas, they eliminate risky employment for people. They are capable of lifting big loads, handling dangerous chemicals, and doing repeated jobs. This has assisted businesses in preventing many mishaps while also saving time and money.
Because of robots' automation potential, many workers are expected to be displaced by AI and robotics technology. Indeed, machines are anticipated to displace 85 million jobs by 2025, as workforces become more human-machine hybrid.
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which type of computer networks are bigger as well as smaller than a MAN?
the answer is LAN for the first blank and WAN for the second blank.
(hope that helped)
Answers
Answer:
which type of computer networks are bigger as well as smaller than a MAN?
the answer is LAN for the first blank and WAN for the second blank.
(hope that helped)
Explanation:
which type of computer networks are bigger as well as smaller than a MAN?
the answer is LAN for the first blank and WAN for the second blank.
(hope that helped)
Do you think that the United States would have been able to win world war l and world war ll without the help of code talkers?
Answers
Code talkers helped US to win both the world wars. As the code talkers were the persons who are experts in delivering secret messages in both regional languages and English.
A name, code talker, was given to American Indians who used their regional language to convey secret messages in the warzones.
Type 1 code was the first code created. Code talkers had a tough task of keep moving because there was always a threat to the transmitted messages.
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A significant improvement since moving from GTK to Qt is that Wireshark provides a native interface for macOS that doesn't require the use of _____.
A. MATE
B. X11
C. Transum
D. Capinfos
Answers
A significant improvement since moving from GTK to Qt is that Wireshark provides a native interface for macOS that doesn't require the use of The right response is B. X11.
Since switching from the GTK+ widget toolkit to Qt, Wireshark has been able to offer a native macOS interface without the need for X11, a third-party software package that enables the display of graphical user interfaces for Unix applications on the Mac.
The user interface of Wireshark on macOS is now quicker, more responsive, and more seamlessly integrated with the operating system thanks to the removal of the need for X11. Users are no longer required to independently install X11 or handle any potential compatibility concerns.
The switch to Qt also makes it simpler for programmers to maintain and improve the codebase while enabling Wireshark to deliver a uniform user experience across many platforms, including Windows and Linux.
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A type of topology in which all the systems a connected a main cable
Answers
Answer:
Bus topology uses one main cable to which all nodes are directly connected. The main cable acts as a backbone for the network. One of the computers in the network typically acts as the computer server. The first advantage of bus topology is that it is easy to connect a computer or peripheral device.
What is the key sequence to copy the first 4 lines and paste it at the end of the file?
Answers
Press Ctrl+C after selecting the text you want to copy. Press Ctrl+V while holding down the cursor to paste the copied text.
What comes first in the copy and paste process for a slide?Select the slide you wish to copy from the thumbnail pane, then hit Ctrl+C on your keyboard. Move to the location in the thumbnail pane where you wish to paste the slide, then hit Ctrl+P on your keyboard.
What comes first in the copying process of a segment?The secret to copying a line segment is to open your compass to that segment's length, then mark off another segment of that length using that amount of opening.
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Joshua needs to store all of his music (over 2 GB), his movies (4GB), and his pictures (1GB). He wants to be able to access his media wherever he goes. He needs a cheap storage solution. Which type of storage would be best for Joshua?
Answers
Answer:Cloud storage
Explanation:I think that the cloud storage would be his best choice, because there are free cloud storages for use and all you need is access to the internet to upload or download files from them.
SCI material can be processed on SIPRNET if the content is Secret/SCI. True.False.
Answers
False. If indeed the content is Secret/SCI, it can be handled on SIPRNET.
Why do we hold Siprnet training every year?This yearly SIPRNET refresher training's goal is to make sure that everyone using the MEDCOM SIPRNET is aware of their duties in protecting sensitive information and systems in line with applicable Army rules and MEDCOM policies on SIPRNET Security Protocols.
Which of the following doesn't fall under the category of restricted unclassified information?Simply put, no material that has been classified in accordance with the Atomic Energy Regulations and Executive Orders No. 13526 may be regarded as CUI.In other words, CUI cannot be applied to any classified information that has the designations "classified," "secret," or "top-secret."
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an advantage of cloud computing is
Answers
An advantage of cloud computing is services can be leased for a limited time on an as-needed basis, No software to install or upgrades to maintain, and can scale to numerous users easily. The correct option is A, b, and c.
What is cloud computing?The term “cloud computing” refers to a technology in which users can use computing resources online as needed. You can use a private, public, or hybrid cloud. Its size can change as well.
Therefore, the correct options are A) Services can be leased for a limited time on an as-needed basis. B) No software to install or upgrades to maintain. C) Can scale to a large number of users easily.
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The question is incomplete. The full question is given below:
Which of the following are the advantages of cloud computing? (select all that apply)
A) Services can be leased for a limited time on an as-needed basis.
B) No software to install or upgrades to maintain.
C) Can scale to a large number of users easily.
D) More secure than locally managed applications
Cheng, a student, is researching a company's profile on a professional networking website. In what way will this kind of research benefit her
most?
OA
getting recommendations from teachers
O B.
preparing for an interview
O C. upgrading her knowledge
O D.
building her brand profile
Answers
The way that this kind of research benefit her is by upgrading her knowledge.
What is research?Research is known to be a kind of making of new knowledge through the use of (or not) of previous knowledge in a novae and creative way.
Note that The way that this kind of research benefit her is by upgrading her knowledge as it will help her to have and get new concepts, methodologies and also have good understandings.
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true or false,ICMP can be best described as the second part of a three-way TCP handshake sent in response to a SYN
Answers
False. ICMP (Internet Control Message Protocol) is a network layer protocol that is used for network maintenance and management, such as error and echo messages. It is not part of the TCP (Transmission Control Protocol) handshake process.
ICMP cannot be best described as the second part of a three-way TCP handshake sent in response to a SYN. ICMP is an internet protocol that sends messages to the source when there are errors or issues with the communication process. It stands for Internet Control Message Protocol. The messages generated by ICMP are transmitted to the source IP address of the communication where the issue occurred in order to notify the source that the communication cannot be processed as intended. ICMP packets cannot be transmitted as payload data; instead, they are encapsulated within IP datagrams.
A three-way handshake is a method for establishing a network link between two network nodes that is also referred to as a TCP handshake. This is accomplished by a three-step process, as the name implies. The three phases of a three-way handshake are as follows:SYN - Sender sends an SYN message to request a communication session from the recipient.ACK - Recipient acknowledges that the sender's request was accepted and that it is ready to communicate. The SYN message is answered with an ACK message.SYN-ACK - The sender acknowledges the recipient's acceptance of the request by sending an SYN-ACK message.ICMP can be used in tandem with TCP, but it cannot be referred to as the second part of a three-way TCP handshake sent in response to a SYN.
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Are DVD players, USBs, printers/scanners, guitar amps, satellite dishes, headphones, dishwashers, radios, and modern cars considered computers?
Answers
Answer:
yes
Explanation:
um ik for sure that a printer/scanner is a computer in a way^^
Answer:
yes they are considered!
Explanation:
they are conisdered computers due to having an interioir machine, which has been engineered to perfrom certain tasks, just like a computer.
write any two uses of word processing software
Answers
Answer:
Editing , saving and printing document
Word processing software is a multi-purpose tool with several uses. Here are two examples:
Document Creation: Word processing software is largely used for document creation and editing.
It has an easy-to-use interface with features including formatting settings, spell checking, and the ability to integrate photos, tables, and other multimedia components.
Word processing software encourages collaboration by allowing numerous people to work on the same document at the same time.
Thus, it allows for real-time editing, commenting, and monitoring of changes, making team collaboration on projects easier.
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Use the data reporte following question. B. Mary and Kevin; Pat: Johnnie; Sarah c. Pat and Mary; Sarah; Kevini Johnnie D. Mary and Sarini, Kevin; Johnnie; Pat - Mary is a new graduate who was hired whille she was a student to start a job in August. 2. How will the labor force change if the following events occur? - Johnnie quit his band in June, has no job in July, and is 1. Sarah starts a second job not looking for.work. 2. Pat finds a good job and is hired. 3. Mary takes a job at McDonald's whille she waits to start her new job. A. Events 1,2, and 3 will not change the labor force. B. Event 1 will decrease the labor force while 2 and 3 will increase it. c. Event 1 will increase the labor force, but events 2 and 3 will decrease it. D. Event 1 will not change the labor force, 2 will increase it and 3 will decrease
Answers
Event 1, where Johnnie quits his band and remains jobless, will decrease the labor force. Event 2, where Pat finds a good job and gets hired, will increase the labor force.
The labor force refers to the total number of people who are employed or actively seeking employment. Based on the given events, we can determine their impact on the labor force:
1. Event 1: Johnnie quits his band and remains jobless. This means that Johnnie is not employed and not actively seeking employment. As a result, he is no longer counted as part of the labor force, leading to a decrease in the labor force.
2. Event 2: Pat finds a good job and gets hired. This indicates that Pat was previously unemployed and actively seeking employment but has now secured a job. Therefore, Pat is added to the labor force, resulting in an increase.
3. Event 3: Mary takes a job at McDonald's while waiting to start her new job. In this case, Mary is employed at McDonald's and is part of the labor force. Even though she is waiting to start her new job, her employment status does not change, so the labor force remains unaffected.
Considering the impact of each event, we can conclude that Event 1 decreases the labor force, Event 2 increases it, and Event 3 has no effect. Therefore, the correct answer is option D: Event 1 will not change the labor force, Event 2 will increase it, and Event 3 will decrease it.
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You have a small home network that uses 192.168.1.0 with the default subnet mask for the network address. The default gateway address is 192.168.1.254, and the router is providing DHCP on the network. The Wrk2 computer has been assigned the IP address of 192.168.1.55. Which of the following is considered the loopback address for the Wrk2 computer
Answers
In this scenario, the loopback address for the Wrk2 computer is 127.0.0.1. It is used for local network testing and communication within the device itself.
The loopback address for the Wrk2 computer in the given scenario is 127.0.0.1.
The loopback address is a special IP address used to test network connectivity on a local machine without actually sending data over a physical network. It allows a device to communicate with itself.
In IPv4, the loopback address is defined as 127.0.0.1 and it is reserved for this purpose. When a device sends data to the loopback address, it is looped back to the device itself without going out to the network.
In the given scenario, the Wrk2 computer has been assigned the IP address 192.168.1.55. This IP address belongs to the local network, and it can be used to communicate with other devices on the same network. However, if the Wrk2 computer wants to test its own network connectivity, it can use the loopback address 127.0.0.1.
For example, if the Wrk2 computer wants to check if its network stack is functioning properly, it can ping the loopback address. By sending a ping to 127.0.0.1, the Wrk2 computer will receive a response from itself, confirming that its network stack is working correctly.
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Write an LMC program as follows instructions:
A) User to input a number (n)
B) Already store a number 113
C) Output number 113 in n times such as n=2, show 113
113.
D) add a comment with a details exp
Answers
The LMC program takes an input number (n) from the user, stores the number 113 in memory, and then outputs the number 113 n times.
The LMC program can be written as follows:
sql
Copy code
INP
STA 113
INP
LDA 113
OUT
SUB ONE
BRP LOOP
HLT
ONE DAT 1
Explanation:
A) The "INP" instruction is used to take input from the user and store it in the accumulator.
B) The "STA" instruction is used to store the number 113 in memory location 113.
C) The "INP" instruction is used to take input from the user again.
D) The "LDA" instruction loads the value from memory location 113 into the accumulator.
E) The "OUT" instruction outputs the value in the accumulator.
F) The "SUB" instruction subtracts 1 from the value in the accumulator.
G) The "BRP" instruction branches back to the "LOOP" label if the result of the subtraction is positive or zero.
H) The "HLT" instruction halts the program.
I) The "ONE" instruction defines a data value of 1.
The LMC program takes an input number (n) from the user, stores the number 113 in memory, and then outputs the number 113 n times.
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