1.16 direct memory access is used for high-speed i/o devices in order to avoid increasing the cpu's execution load. How does the cpu interface with the device to coordinate the transfer?
Answers
The CPU interfaces with the device to coordinate the transfer using a technique called Direct Memory Access (DMA).
Here is how it works:
1. The CPU initiates the DMA transfer by issuing a command to the DMA controller, specifying the source and destination addresses in the memory.
2. The DMA controller takes control of the bus and requests access to the system memory.
3. Once granted access, the DMA controller transfers the data directly between the I/O device and the memory, bypassing the CPU.
4. The CPU is free to perform other tasks while the DMA transfer is in progress.
5. Once the transfer is complete, the DMA controller signals the CPU to indicate that it has finished.
6. The CPU can then perform any necessary processing on the transferred data.
In this way, DMA offloads the data transfer tasks from the CPU, reducing its execution load and allowing it to focus on other critical tasks. This enables high-speed I/O devices to transfer data efficiently without burdening the CPU with unnecessary overhead.
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Related Questions
What is the purpose of this diamond shape in a flowchart?
Answers
Answer:
To represent a decision making step.
Explanation:
for example, assume that you need to display 'pass' if the total marks are greater than 50 and 'fail' if it's less than 50
Then, after calculating the total, you should draw a diamond and inside it write, 'is total ∠ 50?'
after that you can continue your flowchart taking one decission as 'yes' and the other decission as 'no'
The rectangular shape stands for a task or course of activity. In the flowchart sequence, the diamond shape represents a question or a branch.
What is flowchart?A flowchart is a diagram that shows a process' individual steps in their proper order.
It is a general tool that may be customised for a wide range of uses and used to define a variety of processes, including a project plan, an administrative or service process, or a manufacturing process.
These four typical forms are excellent for outlining organisational structure, how various departments interact, and economic, industrial, or administrative operations.
In a process, a decision point is represented by a diamond. Usually, the statement in the symbol will call for a "yes" or "no" response and, in accordance, branch to other locations in the flowchart.
Thus, this is the main use of diamond symbol in a flowchart.
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It shows a larger thumbnail of the selected design and any available settings can be changed.
A. Margin guides
B. Customizable guides
C. Guides
D. Task pane
Answers
Answer:
customizable guides
thank u ❤
Why is special code needed for <?
Answers
Browser software can be set to update automatically, or require manual intervention. Which is preferred
Answers
A browser, also known as web browser is used to surf the internet.
Automatic and manual updates of the web browsers are based on the user preference
Updating one's browser implies that the user wants to have the latest software experience of the browser, provided by the software developer.
Automatic or manual update of the web browser is usually based on the user preference, and several other factors such as:
Network switches.System vulnerability.Unreliable updatesProvision to revert to a previous update.The above factors and few others can influence one's decision of software updates.
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In data analytics, a model is a group of elements that interact with one another.a. Trueb. False
Answers
a. True. In data analytics, a model refers to a mathematical representation of a real-world phenomenon, system, or process.
In data analytics, a model is a mathematical representation of a real-world phenomenon, system, or process. The purpose of a model is to explain and predict certain behaviors or outcomes based on certain inputs or variables.
A model is typically made up of a set of elements, such as variables, that describe different aspects of the situation or system being modeled. These variables interact with each other in a specific way, which is defined by the model. For example, in a linear regression model, the variables interact linearly with one another, with each variable having a corresponding weight or coefficient that determines the strength of its contribution to the model's predictions.
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At work, Ashley is given the task of connecting a printer to a user's computer. Which two ports would most likely be used to connect the printer
to the computer?
Accelerated Graphics Port
HDMI
DisplayPort
USB-C port
Thunderbolt
Answers
Answer:
USB-C port
Thunderbolt
Explanation:
The other ones are all display related.
Answer: the person above me is correct.......
:)
Explanation:
which of the following is a typical medium for interactive design? group of answer choices typography title sequences posters websites next
Answers
Answer:
Websites
Explanation:
Find values of $a$, $b$, and $c$ so that the program:
1. a = # fill in
2. b = # fill in
3. c = # fill in
4. for i in range(a,b,c):
5. print(i, end=' ')
outputs:
6 10 14 18 22 26 30
Answers
We can get started by looking at the output value pattern. We can see that the output is made up of multiples of 4, with a common difference of 4, ranging from 6 to 30 (inclusive).
How can you determine a list's range in Python?When range() is used, the list of even numbers in the input range is returned. With the start, stop, and step parameters set to 2, 20, and 2, respectively, range() will increase the values by 2 and produce even integers up to stop-2.
What does Python's range Len ()) do?One of the built-in functions in Python is len(). It returns an object's length. It can, for instance, return the quantity of items in.
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Which of the following updates should be performed on a regular basis to ensure the OS has the latest security patches?
A. Anti-malware updates
B. Driver updates
C. Windows updates
D. Firmware updates
Answers
Of the following updates should be performed on a regular basis to ensure the OS has the latest security patches. The correct answer is C. Windows updates.
Regularly performing Windows updates is crucial to ensure that the operating system (OS) has the latest security patches. Windows updates are provided by Microsoft and include important security fixes, bug fixes, and feature enhancements for the Windows OS. Security patches are specifically designed to address vulnerabilities and weaknesses that could potentially be exploited by malicious actors. These vulnerabilities could allow unauthorized access, data breaches, or the execution of malicious code on the system. By keeping the OS up to date with the latest security patches, users can minimize the risk of security breaches and protect their systems from various threats. While anti-malware updates are also important for protecting against specific types of malicious software, such as viruses and malware, they primarily focus on detecting and removing known malicious code. Driver updates and firmware updates, on the other hand, are specific to hardware components and peripherals and may improve performance or fix compatibility issues but are not directly related to the security of the OS. In summary, performing regular Windows updates ensures that the OS receives the latest security patches, reducing the risk of vulnerabilities and enhancing the overall security of the system.
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Using at most 20 knots and the cubic spline routines Spline3 Coef and Spline3 Eval, plot on a computer plotter an outline of your:a. School’s mascot. b. Signature. c. Profile.
Answers
The task requires using the cubic spline routines Spline3 Coef and Spline3 Eval, along with a maximum of 20 knots, to plot the outline of a profile.
Cubic splines are mathematical functions commonly used for interpolation and smoothing. The Spline3 Coef routine calculates the coefficients of the cubic spline, and the Spline3 Eval routine evaluates the spline at specific points.
By choosing option C, plotting the outline of a profile, we can utilize the cubic spline routines to represent the shape of a person's profile. This could involve capturing key points along the outline of the profile, such as the forehead, nose, chin, etc., and using these points as knots for the spline. With the computed coefficients and evaluation routine, we can generate a smooth curve that represents the profile's outline.
Option C is the correct answer for plotting the outline of a profile using the given cubic spline routines and 20 knots.
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The variable myFirstName needs to store a user's first name. What data type should it be
initiated as?
Answers
Answer:
In terms of the data type it would most likely be a String and not a Boolean and or a Number.
T/F: analyzes the network over time to find what nodes are the most frequent transmitters or recipients of data.
Answers
The statement "analyzes the network over time to find what nodes are the most frequent transmitters or recipients of data" is True. This type of analysis is useful for identifying important nodes and potential bottlenecks within the network.
Analyzing the network over time can indeed help identify the nodes that are the most frequent transmitters or recipients of data.
By monitoring and collecting network traffic data, it becomes possible to track the flow of data within the network and determine which nodes are actively transmitting or receiving the most data.
Network analysis techniques, such as flow analysis, packet inspection, or log analysis, can be used to analyze the network over time and identify the nodes that are responsible for a significant portion of the data transmission or reception.
This information can be valuable for various purposes, such as identifying network bottlenecks, optimizing network performance, or detecting anomalies or suspicious activity. So, the statement is True.
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Write a program in java to input N numbers from the user in a Single Dimensional Array .Now, display only those numbers that are palindrome
Answers
Using the knowledge of computational language in JAVA it is possible to write a code that input N numbers from the user in a Single Dimensional Array .
Writting the code:class GFG {
// Function to reverse a number n
static int reverse(int n)
{
int d = 0, s = 0;
while (n > 0) {
d = n % 10;
s = s * 10 + d;
n = n / 10;
}
return s;
}
// Function to check if a number n is
// palindrome
static boolean isPalin(int n)
{
// If n is equal to the reverse of n
// it is a palindrome
return n == reverse(n);
}
// Function to calculate sum of all array
// elements which are palindrome
static int sumOfArray(int[] arr, int n)
{
int s = 0;
for (int i = 0; i < n; i++) {
if ((arr[i] > 10) && isPalin(arr[i])) {
// summation of all palindrome numbers
// present in array
s += arr[i];
}
}
return s;
}
// Driver Code
public static void main(String[] args)
{
int n = 6;
int[] arr = { 12, 313, 11, 44, 9, 1 };
System.out.println(sumOfArray(arr, n));
}
}
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what is output? dict1 = {1: 'hi', 2: 'bye'} dict2 = {2: 'yes'} dict1.update(dict2) dict3 = {3: 'no'} dict1.update(dict3) print(dict1)
Answers
The output of the code will be :
{1: 'hi', 2: 'yes', 3: 'no'}
In the given Python code, the output will be a dictionary that includes the key-value pairs of all three dictionaries. The code can be explained step-by-step:
Firstly, two dictionaries, dict1 and dict2, are defined. The keys of dict1 are 1 and 2, and their values are 'hi' and 'bye' respectively. The key of dict2 is 2, and its value is 'yes'.
{1: 'hi', 2: 'bye'}{2: 'yes'}
Then, the dict2 dictionary is merged with dict1 using the update() method. The key-value pairs of dict2 are added to dict1. Since both dicts have the same key 2, the value in dict1 is overwritten with the value from dict2. Hence, the updated dictionary is:
{1: 'hi', 2: 'yes'}{2: 'yes'}
Then, a third dictionary, dict3, is defined with the key 3 and value 'no'.
{3: 'no'}
Finally, dict3 is merged with dict1 using the update() method. The key-value pairs of dict3 are added to dict1. Since dict1 does not have the key 3, the key-value pair from dict3 is simply added to dict1. The final dictionary after the update is:
{1: 'hi', 2: 'yes', 3: 'no'}
Therefore, the output of the code will be:
{1: 'hi', 2: 'yes', 3: 'no'}
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Which of the following is a difference between Table Design view and Table Datasheet view?
Table Datasheet view does not display data.
Table Design view displays table relationships.
Table Design view does not display data.
Table Datasheet view does not allow
Answers
The main difference between the Table Design view and Table Datasheet view is that the former is used to design and structure the table, and the latter is used to view, enter, and modify the data within the table.
How can this be explained?The Table Design view in database systems like MS Access is used to structure the table, define field names, types, and attributes but it doesn't display data.
In contrast, the Table Datasheet view presents the data within the table in a spreadsheet-like format allowing data entry and modification, but it doesn't allow structural changes to the table.
While the Design view focuses on setting up the table structure, the Datasheet view is for interacting with the data. Note that table relationships aren't managed in either view, they're usually handled in a separate relationship diagram.
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The web can be modeled as a directed graph where each web page is represented by a vertex and where an edge starts at the web page a and ends at the web page b if there is a link on a pointing to b. This model is called the web graph. The out-degree of a vertex is the number of links on the web page. True False
Answers
The given statement is true.The web graph is a model for a directed graph that helps to represent the web. This model is important because the internet is a vast and complex network of web pages that are linked together. Each web page is represented by a vertex in the graph, and an edge that starts at vertex a and ends at vertex b is created if there is a link on a that points to b.
In other words, each vertex is a webpage, and each directed edge represents a hyperlink from one webpage to another. The out-degree of a vertex is the number of links that point away from it. This means that the number of edges that originate from a vertex is equal to its out-degree. Therefore, the main answer is True. :We can define web graph as follows: The web graph is a model for a directed graph that helps to represent the web. This model is important because the internet is a vast and complex network of web pages that are linked together.
Each web page is represented by a vertex in the graph, and an edge that starts at vertex a and ends at vertex b is created if there is a link on a that points to b.In other words, each vertex is a webpage, and each directed edge represents a hyperlink from one webpage to another. The out-degree of a vertex is the number of links that point away from it. This means that the number of edges that originate from a vertex is equal to its out-degree. Therefore, the main answer is True.
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The index is the ____________ of a piece of data. in python
Answers
The index is the position numbers of a piece of data in python.
What does Python's data index mean?Indexes, slices, column headers, and condition-based subsetting may all be used in Python to retrieve specific data subsets. Python utilises 0-based indexing, which assigns a value of 0 to the index of the first member in a list, tuple, or other data structure.The index attribute of a DataFrame returns its index information. The row labels are contained in the index information.The index property produces a RangeIndex object with the start, stop, and step values if the rows do not include any named indexes.Each item in a list will be identified by a specific location.To learn more about Python refer to:
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When a condition is tested in a Visual Basic program, this is a possible outcome:
a. the condition is true b. the condition is false c. the condition is constant d. the condition cannot be determined
Answers
The correct outputs for testing a condition in a Visual Basic program are options (a) and (b).
In Visual Basic, what is a conditional statement?Different actions are carried out in response to various decisions using conditional statements. There are four conditional statements in VBScript: If statement: When a condition is met, a set of instructions is run. If...Then... Choose which of the two sets of lines in the else statement to run.
What is a conditional statement used for?Boolean expressions in the form of logical if/else statements and then statements that determine if a statement is true or untrue are used to create conditional statements. The action is possible if the described condition is met in the given circumstance. Your computer's password is an illustration of this kind of statement.
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what significant cloud coverage is reported by this pilot report? kmob ua/ov 15nw mob 1340z/sk ovc-top025 / ovc045-top090
Answers
According to the pilot report, the significant cloud coverage is overcast, with cloud tops at 2500 feet and 4500 feet.
The pilot report is written in a specific format that provides information about weather conditions and other factors relevant to aviation. In this report, the cloud coverage is described using the abbreviations "ovc-top025" and "ovc045-top090," which indicate that the clouds are overcast and that their tops are at 2500 feet and 4500 feet, respectively.
Overcast conditions mean that the sky is completely covered by clouds, and the sun is not visible.
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What is pollution?
the introduction of harmful substances into the environment
the removal of waste from landfills and other waste collection areas
the addition of organic materials in order to clean dirty air and water
the combination of specific chemicals to decompose garbage
Answers
Answer:
other guy is correct it is A.
Explanation:
Did the quiz and got 100%. Edge 2021
The term pollution is the the introduction of harmful substances into the environment.
What is pollution?Pollution is known to be the bringing in of contaminants into any natural environment that may lead to adverse change.
Therefore we can say that The term pollution is the the introduction of harmful substances into the environment and thus it is correct.
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the apple ecosystem is often promoted as a cohesive user-friendly computing environment by design with seamless interaction between apple products for users. what is the mostly likely outcome, for users, as a consequence of the ecosystem.
Answers
When it comes to providing a coherent and strategically forward-looking product portfolio, no company can compete with Apple.
Computers that are so big that built-in handles are necessary are marketed next to smaller, lighter ones that can be worn on the person. Even more remarkably, each of these products is made to function flawlessly with the others.
According to The Grand Unified Theory of Apple Products, each of Apple's main product categories is intended to help users make technology more personal by lowering existing barriers.
Products are made to complete activities that formerly required their more powerful siblings. Then, new form factors are capable of doing new duties in distinctive and various ways. It is the attempt to personalize technology that ultimately fails.
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In_______each processor has its own individual distributed) memory and communicate and coordinate through an interconnection network.
Answer Choices:
a. Multiprocessor Parallelism
b. Multicomputer Parallelism
c. Pipeline Parallelism
Answers
In Multicomputer Parallelism each processor has its own individual distributed) memory and communicate and coordinate through an interconnection network.
In multicomputer parallelism, each processor has its own individual memory and communicates and coordinates with other processors through an interconnection network.
Multiprocessor parallelism, on the other hand, involves multiple processors working together within a single shared memory system. This means that all processors can access and share a common memory space.
Pipeline parallelism refers to a technique where a computational task is divided into smaller stages or steps, and each stage is executed by a dedicated processor.
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write an algorithm to find perimeter of circle
Answers
For a circle with radius r, the formula for the circumference C is
=2
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
Match each of the following network types to its definition: I. HAN II. MAN III. LAN IV. PAN V. WAN A. confined to a small geographic location beyond the home B. services a residence C. used to communicate among devices near an individual D. covers a city E. a network that covers the greatest distance
Answers
Answer:
I. ===> B
II. ===> D.
III ===> A
IV ===> C
V ===> E.
Explanation:
PAN is the smallest network. Then comes then HAN then LAN.
MAN covers a city and WAN covers the greatest distance.
A) None of these B) size, expressed as an integer C) contents D) name E) value of the first. 1. What will the following code display? int numbers[4] = { 99, 87 };
Answers
The code will display the output "99 87" when executed.
What output will be displayed by the given code?When the code is executed, an integer array named "numbers" is created with a size of 4. However, only the first two elements of the array are explicitly initialized with the values 99 and 87, respectively. The remaining elements of the array are automatically initialized to 0 by default.
In the output, the elements of the "numbers" array are displayed sequentially. Since only the first two elements have explicit values assigned, the output will be "99 87".
In C++, when initializing an array with fewer elements than its size, the remaining elements are automatically set to default values. In this case, the array "numbers" has a size of 4 but only the first two elements are explicitly initialized. The remaining elements are assigned the default value of 0.
It is important to note that accessing uninitialized elements in an array may lead to undefined behavior. In this scenario, the uninitialized elements will be displayed as 0 since they were not explicitly assigned any other value.
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The code " int numbers[4] = { 99, 87 };" will display the value of the first element in the array "numbers," which is 99. Therefore, the correct option is E) value of the first.
In the given code, an array named "numbers" is declared with a size of 4 elements and initialized with the values 99 and 87. Since the code does not specify any specific element to be displayed, the default behavior is to display the value of the first element in the array. Therefore, when the code is executed, it will display the value 99, which is the value of the first element in the "numbers" array.
Option E is answer.
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Regarding backups, you want the most efficient restoral process possible after whatever disaster confronts your organization. You want to avoid having to restore from multiple tapes but time constraints prevent you from doing daily full backups. Apart from your weekly full backup, which of the following backup method BEST meets these requirements
Answers
The most space-effective type of backup is incremental backup. However, recovery and restoration procedures can be time-consuming when using incremental backups.
Which database backup method is the most effective?For the majority of scenarios, using differentials results in a higher level of data protection with a smaller increase in storage capacity and faster restore times. Because of this, employing a strategy that combines weekly full backups with daily differential backups is a wise choice for many businesses.
What constitutes a sound data backup plan?According to the 3-2-1 backup strategy, you must maintain: at LEAST THREE copies of your data; data backups across TWO different storage media; data offsite, at least ONE copy.
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A human subject’s photographs show two catchlights in each eye that are unwanted by the photographer. What is the most likely cause of this problem?
Answers
I use the wrap text feature in Excel daily. What is the difference in how this behaves or is used in Excel versus Word? Please explain in detail the differences and similarities.
Answers
The wrap text feature is an essential tool used to format text, particularly long texts or data within a cell in Microsoft Excel. In this question, we need to explain the difference between how wrap text behaves in Microsoft Excel versus how it is used in Microsoft Word.
Wrap Text in Microsoft Excel: Wrap text in Excel is a formatting option that is used to adjust text or data within a cell. When the text entered exceeds the size of the cell, it can be hard to read, and this is where wrap text comes in handy. Wrap text in Excel automatically formats the data within the cell and adjusts the text size to fit the cell's width. If a cell contains too much data to fit in the column, the cell's text wraps to the next line within the same cell.
To wrap text in Excel, follow these simple steps:
Select the cell or range of cells containing the text that needs wrapping. Right-click on the selected cell and click Format Cells. In the Format Cells dialog box, click on the Alignment tab. Click the Wrap text option and then click OK.Wrap Text in Microsoft Word: In Microsoft Word, the Wrap Text feature is used to format text around images and graphics. It is used to change the way the text flows around the image, allowing users to position images and graphics in the document. Wrap Text in Microsoft Word does not adjust the font size of the text to fit the width of the cell like in Excel.
To wrap text in Microsoft Word, follow these simple steps:
Insert the image in the document. Select the image and go to the Picture Format tab. Click on Wrap Text, and you can choose how you want the text to wrap around the image.The main difference between the use of Wrap Text in Microsoft Excel and Microsoft Word is that Wrap Text in Excel is used to format long data and adjust text size to fit the width of the cell while Wrap Text in Microsoft Word is used to format text around images and graphics.
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How would Netflix calculate the revenue per paying subscriber for each year?
Answers
Answer:
Graphic 3 displays the three different Netflix pricing plans with different monthly prices primarily differentiated by number of users simultaneously streaming per account and HD content. Prices were raised in January 2019. The average annual revenue per paying membership is the Total Streaming Revenue divided by the Number of Paid Members ($11,242,216,000 / 110,644,000 = $101.61), Figure 4 cell C13.
Describe why direct memory access (DMA) is considered an efficient mechanism for performing I/O.
Answers
Direct memory access (DMA) is considered an efficient mechanism for performing I/O because it allows data to be transferred between peripherals and memory without involving the CPU. This means that the CPU can continue to perform other tasks while the data transfer is taking place, improving overall system performance.
What is Direct memory access (DMA)?
Direct Memory Access (DMA) is a technique used in computer systems to transfer data between the main memory and peripheral devices without involving the CPU. DMA enables faster and more efficient data transfer by allowing devices to read from or write to the memory directly, bypassing the CPU and freeing it for other tasks.
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