what is a dangling/stale pointer? and please give a code example.
Answers
A dangling or stale pointer is a pointer that points to a memory location that has been deleted or deallocated, making it invalid for use. This situation can lead to undefined behavior or program crashes if the pointer is used.
Here's a code example to illustrate a dangling pointer:
c
#include
#include
int main() {
int *ptr = (int*) malloc(sizeof(int)); // Allocate memory for an integer
*ptr = 10; // Assign a value to the allocated memory
printf("Value at ptr: %d\n", *ptr); // Output: Value at ptr: 10
free(ptr); // Deallocate the memory
// At this point, 'ptr' becomes a dangling pointer because it still points to the deallocated memory.
// Using 'ptr' now is not safe and can lead to undefined behavior or crashes
printf("Value at ptr after deallocation: %d\n", *ptr); // Undefined behavior
return 0;
}
In this code example, we first allocate memory for an integer and assign a value to it. Then, we deallocate the memory using free(ptr). After deallocating the memory, the pointer 'ptr' still holds the address of the deallocated memory, making it a dangling or stale pointer. Accessing or using this pointer after deallocation can lead to undefined behavior or crashes.
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Related Questions
can someone help me, please
Answers
Answer:
eeeee
Explanation: flamingo youtooz
Communications PLC:
2. Which OSI Layers that is connected for communications
established and released
Answers
In communications, the establishment and release of connections involve multiple layers of the OSI (Open Systems Interconnection) model. The primary layers involved are the transport layer and the session layer.
What is the job of the transport layer?The transport layer (Layer 4) is responsible for establishing and releasing connections between end-to-end communication endpoints. It ensures reliable delivery of data and manages flow control, error correction, and congestion control.
The session layer (Layer 5) provides the mechanism for establishing, managing, and terminating communication sessions between applications. It handles session establishment and teardown, synchronization, and checkpointing.
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Explain briefly what would happen if marketing research is not conducted before a product is developed and produced for sale.
Answers
Neglecting to do market research can result in indecision and inaction, fear of risk or the truth, and/or too many options, which can lead to paralysis. ... When launching a new product, effective market research will help you narrow down your true market potential and your most likely customers.
how do i create a robot
Answers
Answer:
with your hands
Explanation:
type of keyboard that uses a touch screen as the input device. group of answer choices virtual wireless pda traditional
Answers
The type of keyboard that uses a touch screen as the input device is a virtual keyboard.A virtual keyboard is an on-screen keyboard that works by detecting and tracking the user's finger movements on a touch screen. It allows users to type on a digital screen by tapping on the keys with their fingers.
It is a type of input device that is commonly found on smartphones, tablets, and other mobile devices.The virtual keyboard is different from the traditional keyboard in that it doesn't have any physical buttons. The keys on a virtual keyboard are displayed on the screen and can be customized to suit the user's needs. Some virtual keyboards come with features such as predictive text, auto-correct, and swipe-to-type functionality, making it easier and faster for users to type.Virtual keyboards can also be used on wireless devices, such as laptops, and can be connected through Bluetooth or Wi-Fi. They are also commonly found on PDAs (personal digital assistants), which are handheld devices that are used for personal organization, communication, and computing tasks.
In summary, a virtual keyboard is a type of keyboard that uses a touch screen as the input device. It is commonly found on mobile devices, but can also be used on wireless devices and PDAs.
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A user can add color to a database to highlight a modification. To do this with a macro, which command screen would you access on the Property Sheet?
A.Code Builder
B.Visual Builder
C.Macro Builder
D.Expression Builder
Answers
The command screen would you access on the Property Sheet is Code Builder
Who is a Code Builder?This is known to be a kind of Visual Studio Code that is made to be running fully in a browser and it is one that is enhanced or backed up by a good cloud-hosted developer environment.
Conclusively, Note that a Visual Studio Code, it can be used by a person to be able to access on the Property Sheet is Code Builder
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Answer:
Its A
Explanation:
how many bits and bytes are occupied by six long variables
Answers
Answer:
24 bytes = 192 bits
Explanation:
A long is typically 4 bytes or 4*8 = 32 bits
However, on some 64 bit systems, a long is defined as 64 bits so the answer is not universal.
If someone want to type race with me :
https://play.typeracer.com?rt=21mvsi61s8
Let's improve our typing speed.
Reccomendation:(Use computer)
Answers
why wont my chromebook stay charging while im using it
Answers
Answer:
Explanation:
Well, it is probly because your chromebook is broken or the carger and/or is it working when you are not using it?
True or False? Application software is written to solve problems in the real world.
Answers
True. Application software is written to solve problems in the real world. It is designed to perform specific tasks or functions that are required by users, businesses, or organizations.
Application software, also known as an "app" or simply "application", is a type of computer software designed to perform specific tasks or functions for users, businesses, or organizations. It is different from system software, which is responsible for managing the computer's hardware and providing a platform for application software to run on. Application software can be created for a variety of purposes, including productivity, communication, entertainment, education, and more. Examples of application software include word processors, email clients, web browsers, multimedia players, gaming software, and many others. Application software can be installed on a computer, downloaded from the internet, or accessed through a web browser or mobile device.
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The statement "Application software is written to solve problems in the real world" is generally true.
Application software refers to computer programs that are designed to perform specific tasks or solve specific problems for users. These tasks can range from basic functions, such as word processing and spreadsheet creation, to more complex operations, such as inventory management or financial analysis.
The purpose of application software is to provide users with tools that can help them solve real-world problems and make their work more efficient and effective. For example, a project management software can be used to manage tasks, timelines, and resources for a complex project, while an accounting software can be used to manage financial records and transactions for a business.
Developers write application software with the goal of meeting the needs and requirements of users in various fields and industries. This often involves extensive research, analysis, and testing to ensure that the software is effective, user-friendly, and reliable.
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Is this statement true or false?
When copying a pie chart from Calc or Excel to Impress or PowerPoint, once the chart has been pasted, it cannot be edited.
A. true
B. false
C. It depends on what paste option was selected.
Answers
True
pls Mark as brainlist
A hyperlink with the _____ scheme may cause a web browser on a mobile device to initiate a phone call.
Answers
Answer:
tel; scheme
This is a function found in Java script that is used to initiate phone-calls per a given number.
-learning code and computers with potato
Write a program to convert centigrade to Kelvin. It should display value in centigrade and then the value in Kelvin just as you displayed squares in the previous question. The range to be followed for this conversion is from 50-100 degree celsius.
So, it should look like this:
1. Centrigrade: 50 --> Kelvin: 323.15
2. Centrigrade: 51 --> Kelvin: 324.15
3. Centrigrade: 52 --> Kelvin: 325.15
etc.
Answers
Answer:
for degree in range(50, 101):
kelvin = degree + 273.15
print("Centrigrade: {} --> Kelvin: {}".format(degree, kelvin))
Explanation:
*The code is in Python.
Create a for loop that iterates from 50 to 100 (Note that the starting value is included, but the ending value is not included in the range method. That is why you need to write range(50, 101) to iterate from 50 to 100)
Convert the centigrade to kelvin using formula (Note that the degree variable represents the each centigrade degree from 50 to 100 and you need to add 273.15 to convert it to Kelvin)
Print the result as in requested format
The name of the author who created the presentation is included in ____. a. the presentation evaluation b. metadata c. the off-slide content
Answers
The name of the author who created the presentation is included in the b) metadata.
Metadata is the information that describes the data or content of a file. In the case of a presentation, metadata includes details about the author, title, date created, and other relevant information. This information is used to help organize, search, and manage files.
Including the author's name in the metadata is important for giving credit and acknowledging the original creator of the presentation. It also helps to establish credibility and authority for the presentation, especially in academic or professional settings.
On the other hand, presentation evaluation refers to the process of assessing the quality and effectiveness of the presentation. It usually involves feedback from the audience or reviewers and can include criteria such as content, delivery, organization, and visuals.
The off-slide content, on the other hand, refers to any additional information that is not directly included in the slides, such as speaker notes, handouts, or references.
Therefore the correct option is b. metadata
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Complete the following sentence.
Some manufactured dams produce BLANK power in addition to retaining water.
Answers
Answer:
Some dams produce renewable hydroelectric power
Explanation:
hydroelectric is power from water
Answer:
hydroelectricExplanation:
The correct answer is hydroelectric. Dams are structures created to serve as a barrier and to retain water. Some dams are also used to produce hydroelectric power.
When troubleshooting an obscure network problem, what physical conditions should be reviewed to make sure the network device is operating correctly?
Answers
When troubleshooting an obscure network problem, there are several physical conditions that should be reviewed to ensure that the network device is operating correctly. Here are some key areas to consider:
1. Cables and Connections: Check the physical connections between the network device and other devices, such as switches, routers, or computers. Ensure that the cables are securely plugged in and not damaged.
2. Power Supply: Verify that the network device has a stable power source. Check if the power adapter or cable is functioning properly. Also, ensure that the device is receiving the appropriate voltage.
3. Lights and Indicators: Pay attention to the lights and indicators on the network device. They can provide valuable information about its status. Look for any unusual blinking patterns or error messages displayed on the device.
By reviewing these physical conditions, you can identify any potential issues that may be impacting the operation of the network device.
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Ive accidently said yes to a 30 day free trial for amazon music and i have cancelled it but i went on my alexa abd it still plays unlimited music?? Plz someone help!!
Answers
Answer:
It might take some time to cancel
My learning platform says I have 9 new messages. It goes up when I have new ones but after I read all of them, It goes back to 9, It's always like that, WHYY?
Someone, PLS HELP
Answers
Answer:
have you told anyone about it? like a teacher or something?
Explanation:
I think it's just a glitch
Answer:
Click Archive to remove the message from the inbox list and file it away to the Archived list. See "Archived messages" on page 56. You can filter your inbox to only see unread or read messages.
Can someone help me write a code in python to find the sum of all the odd numbers from 1-301.
In which python makes a list of all the odd numbers and uses a loop
Answers
arr = [] #an empty array
for i in range(302):
arr.append(i) if i%2 != 0 else None #add a new element, if its odd, else - nothing
print(sum(arr)) #printing the sum of elements
In Scratch, you have to choose backdrops from a limited number in the Scratch image library.
Group of answer choices
True
False
Answers
Answer:
True
Explanation: im Awsome
Think about how you view your emails—either the email service you use yourself or an email service you would choose to use. Describe that email service and then explain whether you use POP3 or IMAP to access your email. How do you know it’s POP3 as opposed to IMAP?
Answers
Answer:
and POP3, followed in later years. POP3 is still the current version of the protocol, though this is often shortened to just POP. While POP4 has been proposed, it's been dormant for a long time.
IMAP, or Internet Message Access Protocol, was designed in 1986. Instead of simply retrieving emails, it was created to allow remote access to emails stored on a remote server. The current version is IMAP4, though most interfaces don't include the number.
The primary difference is that POP downloads emails from the server for permanent local storage, while IMAP leaves them on the server while caching (temporarily storing) emails locally. In this way, IMAP is effectively a form of cloud storage.
Think about how you view your emails is either the email service you use yourself or an email service you would choose to use POP3, followed in later years.
What is POP3?POP3, followed in later years as the POP3 is still the current version of the protocol, though this is often shortened to just POP. While POP4 has been proposed, it's been dormant for a long time.
IMAP, or Internet Message Access Protocol, was designed in 1986. Instead of simply retrieving emails, it was created to allow remote access to emails stored on a remote server. The current version is IMAP4, though most interfaces don't include the number.
The primary difference is that POP downloads emails from the server for permanent local storage, while IMAP leaves them on the server while caching (temporarily storing) emails locally. In this way, IMAP is effectively a form of cloud storage.
Therefore, Think about how you view your emails is either the email service you use yourself or an email service you would choose to use POP3, followed in later years.
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why is computer called an information processing device ?
Answers
Since, the computer accepts raw data as input and converts into information by means of data processing, it is called information processing machine (IPM).
Computer is called information processing machine because it gives you meaningful information after processing raw data......
A PIN is easier for the account owner to use and remember because it is shorter than a password. However, a PIN can only be used once. However, it is also easier for hackers to steal. However, a password can safely be stored. However, it is more difficult for hackers to steal.
Answers
Answer:
Pin
Explanation:
Pin number works for me.
The Event Viewer (Microsoft Windows) or Console (Apple Mac OS X) is used for what purpose?
to view and manage events scheduled in one or more user calendars
to configure system security features such as firewalls and antivirus scanners
to view incidents recorded in the Application, Security , and System logs
to manage user names and passwords on a network
Answers
Answer: Its C
Explanation:
The Event Viewer is a practical heritage feature in Windows 10 that collects event logs from programs and system components into a simple structure that you can then examine to diagnose and repair software or hardware issues with your computer. Thus, option C is correct.
What Event Viewer role in Microsoft and macOS?A monitoring application called Microsoft Windows Server Event Viewer displays a log of events and can be used to diagnose problems on Windows-based systems. Information concerning application-related, security-related, system-related, and setup events is shown in the Event Viewer.
Crescendo is a real-time event viewer for macOS that leverages the ESF to display process executions and forks, file events, share mounting events, kernel extension loads, and IPC event data.
Therefore, to view incidents recorded in the Application, Security , and System logs is used for purpose.
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Travis just got promoted to network administrator after the previous administrator left rather abruptly. There are three new hires that need onboarding with user accounts. When Travis looks at all the existing account names, he notices there is no common naming system. Where should he look to try to give the new hires user accounts with proper naming conventions
Answers
Answer:
The company's account policy
Explanation:
If there's no common naming system, It's best to go with the company's account policy.
What is HDD in computer and technology
Answers
Answer:
Hard Disk, also called hard disk drive or hard drive. It used as Storage.
Storage devices like hard disks are needed to install operating systems, programs and additional storage devices, and to save documents.
Storage Capacity:16 GB, 32 GB and 64 GB. This range is among the lowest for HDD storage space.120 GB and 256 GB. This range is generally considered an entry point for HDD devices such as laptops or computers.500 GB, 1 TB and 2 TB. Around 500 GB and above of HDD storage is typically considered decent for an average user. More than 2 TB. Anything over 2 TB of HDD space is suitable for users who work with high-resolution files, Currently, the highest capacity HDD is 20 TB.Name any two operating systems you know.
Answers
Answer:
software and hardware
Should Microsoft bring paid ads to its X-Box gaming space in light of the new activision deal? Is Microsoft moving to slow with it acquisition based strategy and should they look to develop solutions in house?
Answers
Key factors to keep in mind when utilizing paid advertisements within the box gaming domain, as well as effective methods for gaining new customers is User Experience.
What is the gaming spaceThe addition of advertisements that require payment within the box gaming world has the potential to adversely affect the user experience. Most gamers usually desire unbroken gaming and might react unfavorably towards advertisements that are intrusive or that cause disruptions.
To increase revenue on the box platform, Microsoft may consider implementing paid advertisements as a form of monetization. By making use of advertising income, there is a potential to acquire additional funds that can be utilized for various endeavors such as enhancing platform development, etc.
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Define a class Sphere to input radius of a sphere and compute the volume of it. Volume = πr3 (where π=3.14)
Answers
Lets use Python
Program:-
\(\tt r=(float(input("Enter\:the\:radius\:of\:Sphere=")))\)
\(\tt V=4/3*3.14*r**3\)
\(\tt print("Volume\:of\:the\:sphere=",V)\)
Output:-
\(\tt Enter\:the\:radius\:of\:the\:sphere=3\)
\(\t Volume\:of\:the\:Sphere=103.4\)
1.13 suppose a new standard, the iddd-643 standard, is developed for storing numbers in a string of 16 bits. the first bit is used for the sign of the number (0 if positive and 1 if negative). the next five bits store the exponent plus the bias, and the remaining 10 bits store the mantissa. the bias is 15 and no bits are reserved for any special purposes. what is the smallest exponent that can be stored?
Answers
The smallest exponent that can be stored in the iddd-643 standard is 8.
In the given scenario, the iddd-643 standard is used for storing numbers in a 16-bit string. The first bit is used for the sign, the next five bits for the exponent plus the bias, and the remaining ten bits for the mantissa. The bias is 15, and no bits are reserved for any special purposes. To determine the smallest exponent that can be stored, we need to understand the range of the exponent and how the bias is applied.
The exponent is represented using 5 bits, so it can have a total of 2^5 = 32 different values. However, since one bit is reserved for the sign, the actual number of distinct values that can be represented for the exponent is reduced to 2^4 = 16.
The bias is added to the actual exponent value to determine the stored exponent. In this case, the bias is 15. Bias is used to enable the representation of both positive and negative exponents. By applying a bias, the range of the stored exponent can be shifted.
Since the smallest exponent value must be stored, we want the stored exponent to be as small as possible. To achieve this, we need to subtract the bias from the minimum possible value of the actual exponent.
The minimum possible value for the actual exponent can be calculated using the formula: -(2^(n-1) - 1), where n is the number of bits available for the exponent. In this case, n is 5.
Using the formula, we can calculate the minimum possible value for the actual exponent as -(2^(5-1) - 1) = -(8 - 1) = -7.
To obtain the stored exponent, we add the bias to the actual exponent: -7 + 15 = 8.
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