Which of the following code will create an index named stu_sub on the columns roll_no and subject of the stu_subjects table?
A. create index stu_sub from stu_subjects(roll_no, subject);
B. create index stu_subjects on stu_sub(roll_no, subject);
C. create index stu_sub on stu_subjects(roll_no, subject);
D. create index stu_sub on stu_subject(roll_no, subject);
Answers
The code to create an index named stu_sub on the columns roll_no and the subject of the stu_subjects table is: CREATE INDEX stu_sub ON stu_subjects(roll_no, subject; So, the correct answer is C.
An index is a database structure that enhances the speed of operations on database tables. When you create an index, you define a relationship between one or more columns in a table and an index structure that improves query efficiency. The syntax for creating an index in SQL is given below:
CREATE INDEX index_name
ON table_name (column1, column2, ...)
WHERE condition; To create an index named stu_sub on the columns roll_no and the subject of the stu_subjects table, the correct syntax is: create index stu_sub on stu_subjects(roll_no, subject);
Hence, option C is the correct answer.
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Related Questions
in ipv6 terminology nodes on the same local network are referred to as these.
Answers
In IPv6 terminology, nodes on the same local network are referred to as "link-local" or "on-link" nodes.
In IPv6, a link-local address is an address assigned to a network interface on a specific link or network segment. It is used for communication between devices within the same local network. Link-local addresses are automatically generated based on the MAC (Media Access Control) address of the network interface, ensuring uniqueness within the local network.
Nodes on the same local network, which share the same link-local address range, are considered "on-link" nodes. This means that they can directly communicate with each other without the need for routing through intermediate network devices. They can send IPv6 packets to each other using link-local addresses, bypassing the need for a global or unique local address.
On-link nodes are typically located within the same physical or logical network segment, such as a local area network (LAN) or a VLAN (Virtual LAN). They can discover and communicate with each other using link-local addresses, facilitating local network communication and enabling services and applications to interact within the same network segment.
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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.
in a one-one relationship, the _____ key is often placed in the table with fewer rows. this minimizes the number of _____ values.
Answers
In a one-one relationship, the FOREIGN key is often placed in the table with fewer rows. This minimizes the number of NULL values.
In a database, a one-one relationship occurs when one row in a table is linked with one row in another table. Each record in the first table links to one record in the second table, and each record in the second table links to one record in the first table. The relationship's properties indicate that each row in a table is related to only one row in the other table. A foreign key is used to represent a one-to-one relationship.When a relationship is one-to-one, a FOREIGN key is frequently placed in the table with fewer rows. This is to reduce the number of NULL values. A NULL value is a field with no value assigned to it, and it's permitted in a relational database table. When a relationship is one-to-one, one row in one table can match only one row in the other table. As a result, the remaining rows must be NULL, which can waste database space.The primary key is used to represent the primary entity in a relationship. It's a unique identifier that's often used to link to foreign keys in other tables. The FOREIGN key in a relationship is a reference to the primary key in another table. It's a column in one table that corresponds to the primary key of another table.
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What is the problem with using strict alternation as a synchronization mechanism?
Answers
The problem with using strict alternation as a Synchronization mechanism is that it can lead to a situation called "starvation".
In strict alternation, threads or processes take turns executing their critical sections one after another. However, if one thread consistently gets priority over others, it can cause starvation for the other threads. This means that the starved threads are not able to make progress and execute their critical sections, leading to delays or even deadlock.
Strict alternation also does not provide any fairness guarantee. If a higher-priority thread continuously arrives, it can monopolize the resource, causing lower-priority threads to wait indefinitely. This can result in unfairness in resource allocation and potential performance degradation.
To avoid these issues, synchronization mechanisms like semaphores, locks, or condition variables can be used instead. These mechanisms provide better control over resource access and ensure fairness among threads.
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Question Workspace Check My Work The concepts and methods of OM can be used _____. a. only for internal customers. b. only for external customers. c. in any job. d. in any job, as long as it involves supply chains.
Answers
The concepts and methods of Operations Management (OM) are applicable in any job, regardless of whether the customers are internal or external.
OM is concerned with designing, implementing, and controlling processes that transform inputs into outputs, with the ultimate goal of adding value to the customer. This could involve manufacturing products, delivering services, or managing supply chains. Therefore, OM can be applied to any industry or sector, from healthcare and education to transportation and hospitality.
In the context of internal customers, OM can be used to improve the efficiency and effectiveness of internal processes, such as hiring, training, and performance evaluation. For example, by using the principles of Lean Management, a company can eliminate waste and streamline its hiring process, which will ultimately benefit both the internal customers (employees) and the external customers (clients).
Similarly, in the context of external customers, OM can be used to enhance the quality, speed, and reliability of the products or services being offered. For instance, by using Total Quality Management (TQM), a company can continuously improve its products or services based on customer feedback, which will increase customer satisfaction and loyalty.
Overall, OM is a versatile field that can be applied in any job, as long as it involves processes that can be improved or optimized. By using OM concepts and methods, organizations can achieve operational excellence, which translates into improved performance, profitability, and customer satisfaction.
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What is the term for the psychology, reasoning, and history behind a character's reactions in certain situations?
Answers
Most teenagers operate off of social-cultural psychology, primarily because of propaganda on TV, family traditions, etc.
Psychological factors like cognition could serve as a trait for situations.
Biological traits like testosterone, bipolar disorder, etc. It can affect these situations.
computer system allows three users to access the central computer simultaneously. Agents who attempt to use the system when it is full are denied access; no waiting is allowed. of 28 calls per hour. The service rate per line is 18 calls per hour. (a) What is the probability that 0,1,2, and 3 access lines will be in use? (Round your answers to four decimal places.) P(0)= P(1)= P(2)= P(3)= (b) What is the probability that an agent will be denied access to the system? (Round your answers to four decimal places.) p k
= (c) What is the average number of access lines in use? (Round your answers to two decimal places.) system have?
Answers
In the given computer system scenario, there are three access lines available for users to access the central computer simultaneously. The arrival rate of calls is 28 per hour, and the service rate per line is 18 calls per hour.
We are required to calculate the probabilities of different numbers of access lines being in use, the probability of an agent being denied access, and the average number of access lines in use.
(a) To calculate the probabilities of different numbers of access lines being in use, we can use the formula for the probability of having k lines in use in a system with three lines, given by P(k) = (1 - p) * p^(k-1), where p is the utilization factor. The utilization factor can be calculated as p = λ / μ, where λ is the arrival rate and μ is the service rate per line.
Using the given values, we can calculate the probabilities as follows:
P(0) = (1 - p) * p^2
P(1) = (1 - p) * p^0
P(2) = (1 - p) * p^1
P(3) = p^3
(b) The probability of an agent being denied access is equal to the probability of all three access lines being in use, which is P(3) = p^3.
(c) The average number of access lines in use can be calculated using the formula for the average number of customers in a system, given by L = λ / (μ - λ). In this case, since there are three lines available, the average number of access lines in use would be L / 3.
By plugging in the values and calculating the probabilities and average number of access lines, we can obtain specific numerical answers.
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Help! Will add the brainliest.
Which of the following is a tip for getting a good pet photograph?
A. Always stand when taking the picture to keep the pet away from the camera.
B. Show the pet's personality.
C. Avoid having others with you.
D. All of the above
Answers
Answer:
Show the pet's personality
Explanation:
You want to get to know an animal when you look at their photo. If they are smiling then that will show how happy they are! Also, A is incorrect because sometimes you want to be on the same level as your animal. So crouch down and take that close up! And C is wrong because sometimes it is helpful for someone else to be there.
Elliot keeps spreadsheets of the expenses required to keep his stationary store in business. One keeps track of the month rent, electric bill, water bill, and internet bill. Which cells would it make sense for Elliot to lock
Answers
rent and internet bill
i just did the test!
Answer:
Rent and internet bill
What prevents someone who randomly picks up your phone from sending money to themselves using a messenger-based payment?
Answers
Answer:
Explanation:
There are various safety features in place to prevent such scenarios from happening. For starters phones usually have a pin code, pattern code, or fingerprint scanner which prevents unauthorized individuals from entering into the phone's services. Assuming that these features have been disabled by the phone's owner, payment applications usually require 2FA verification which requires two forms of approval such as email approval and fingerprint scanner in order for any transactions to go through. Therefore, an unauthorized individual would not have access to such features and would not be able to complete any transactions.
The feature which prevents someone who randomly picks up your phone from sending money to themselves using a messenger-based payment is:
Security features like passwords or authentication codesIn a messenger-based payment system, there exists various safety features which prevents unauthorised use of the system to send money fraudulently. Some of these features include:
PasswordsPersonal Identification Number (PIN)Two factor authentication (2FA)As a result of this, we can see that these features prevent someone from making unauthorised money transfers.
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Define function print_popcorn_time() with parameter bag_ounces. If bag_ounces is less than 3, print "Too small". If greater than 10, print "Too large". Otherwise, compute and print 6 * bag_ounces followed by "seconds". End with a newline. Remember that print() automatically adds a newline.
Answers
Answer:
In Python:
def print_popcorn_time(bag_ounces):
if bag_ounces < 3:
print("Too small")
if bag_ounces > 10:
print("Too large")
else:
print(str(6 * bag_ounces)+" seconds")
Explanation:
This defines the function
def print_popcorn_time(bag_ounces):
This checks if bag_ounces < 3
if bag_ounces < 3:
If yes, it prints too small
print("Too small")
This checks if bag_ounces > 10
if bag_ounces > 10:
If yes, it prints too big
print("Too large")
If otherwise,
else:
Multiply bag_ounces by 6 and print the outcome
print(str(6 * bag_ounces)+" seconds")
Answer:
Explanation:
def print_popcorn_time(bag_ounces):
if bag_ounces < 3:
print("Too small")
elif bag_ounces > 10:
# Use of 'if' for this portion, will only yield a test aborted for secondary tests
print("Too large")
else:
print(str(6 * bag_ounces)+" seconds")
user_ounces = int(input())
print_popcorn_time(user_ounces)
How do i fix this? ((My computer is on))
Answers
Answer:
the picture is not clear. there could be many reasons of why this is happening. has your computer had any physical damage recently?
Answer:your computer had a Damage by u get it 101 Battery
and if u want to fix it go to laptop shop and tells him to fix this laptop
Explanation:
the importance of computer software has grown overtime. what is considered to be the major driving force behind this change?
Answers
Indispensable for all aspects of life, personal and professional is considered to be the major driving force behind this change in importance of computer software.
Option B is correct.
What is the significance of computer software?Software not only enables your computer hardware to carry out crucial functions, but it can also assist your company in working more effectively. Even new ways of working can be created with the right software. Because of this, it is an essential business asset, and you should select your software carefully to ensure that it meets your requirements.
What are the primary purposes that computer software serves?The programs that are required to carry out the activities of information systems' input, processing, output, storage, and control are referred to as software. There are typically two main categories of computer software: application software and system software.
Incomplete question :
The importance of computer software has grown overtime. What is considered to be the major driving force behind this change?
A.Radical change in older technologies
B.Indispensable for all aspects of life, personal and professional
C.Indispensable for business, science, and engineering
D.Increase in personal computers
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invalid plugin detected. adobe acrobat reader will quit
Answers
Answer:
Need more information to help
Explanation:
There is an issue in the plugin folder of Acrobat which is why it is not loading...
Lee can hold a phone up to a museum exhibit and, on the screen, is more information about the exhibit overlaid on top of a picture of the exhibit. What is this program called?
Answers
Answer:
Augmented reality
Explanation:
augmented reality because I was doing a test looked at the answers and this answer didn’t make since so I looked up the definitions of all of them and it is augmented reality.
Describe the CIA triad principles and also the Parkerian hexad principles that are affected in the following situation: Using the medical office which has been used as our example in the slides, they are sending a backup disk of personal and payment information for their customers that is encrypted to an off sight location. The disk is being transported via a carrier to the storage facility is lost.
Answers
The loss of the backup disk has affected several principles of information security, including confidentiality, integrity, and availability from the CIA triad and possession, utility, and authenticity from the Parkerian Hexad principles.
The CIA triad comprises three key principles: Confidentiality, Integrity, and Availability. They are vital in ensuring information security. The Parkerian Hexad extends the CIA triad to include three additional components: Possession, Utility, and Authenticity. They help to expand the CIA triad by addressing other aspects of information security in different environments.The scenario described in the situation has affected both the CIA triad principles and Parkerian Hexad principles in the following ways:Confidentiality is affected as personal and payment information for their customers is on the backup disk that has been lost.
The medical office must ensure that customer data remains confidential and not released to unauthorized individuals. There is a risk of customers' data getting exposed to unintended persons who may use it for malicious purposes. The principle of confidentiality involves maintaining the privacy of data, and it is one of the CIA triad principles that are essential for maintaining the security of information.Integrity is also affected because the backup disk was encrypted, but the information is lost. The medical office must ensure that the data is consistent and accurate. In the context of information security, integrity refers to ensuring the data is complete, accurate, and unchanged.
Loss of data may lead to inaccurate information being used, causing harm to customers or the organization itself. The principle of integrity is essential in maintaining the accuracy of information and ensuring the data is trustworthy.Availability is also affected because the medical office has lost critical information about their customers. The backup disk was stored off-site in a secure location to prevent the data from being lost or damaged. However, the carrier lost the disk, and now the medical office has to find ways to recover the lost data. Availability is one of the CIA triad principles that ensure information is available when required.
When information is lost, it may cause delays, leading to loss of revenue and reputation.The Parkerian Hexad principles that have been affected include Possession, Utility, and Authenticity. Possession is the assurance that an authorized individual or system has control over the information. In this scenario, the loss of the backup disk means that possession of the information is no longer within the medical office's control. This puts the data at risk of being accessed by unauthorized individuals.Utility refers to ensuring that the information is useful for authorized users.
The medical office stored the backup disk in an off-site location to ensure that the data is available when required. However, the loss of the backup disk has caused the medical office to lose access to critical customer information, leading to a reduction in the data's utility.Authenticity is the principle of ensuring that the data is genuine and can be trusted. The medical office had encrypted the backup disk to prevent unauthorized access to customer information. However, the loss of the backup disk means that the authenticity of the data cannot be verified, leading to a breach of trust and loss of reputation.
To summarize, the loss of the backup disk has affected several principles of information security, including confidentiality, integrity, and availability from the CIA triad and possession, utility, and authenticity from the Parkerian Hexad principles.
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If the system has a mechanical advantage of 5 and the load of 350N.What effort is needed to lift the weight? Provide your answer in newtons
Answers
Answer:
Effort = 70 N
Explanation:
A machine is a device that can be used to overcome a load by the application of a minimal effort. For a practical machine, mechanical advantage (MA) is the ratio of the load (L) overcome to the effort (E) applied.
i.e MA = \(\frac{Load}{Effort}\)
In the given question, MA = 5 and the load = 350 N. So that;
5 = \(\frac{350}{E}\)
E = \(\frac{350}{5}\)
= 70
The effort applied to the machine is 70 N.
One the line below, Write the macimum number of columns you can sort by in the sort dialog box
Answers
Answer:
64
Explanation:
You can sort by up to 64 columns. Note: For best results, the range of cells that you sort should have column headings.
part of the hr renewal, multi-infotype scenarios allows employee data maintenance that involves multiple infotypes. in sap hcm, this was accomplished using
Answers
In SAP HCM (Human Capital Management), the capability of maintaining employee data involving multiple infotypes, as part of the HR renewal and multi-infotype scenarios, was accomplished using **SAP Personnel Actions**.
Personnel Actions in SAP HCM are predefined sets of actions that enable the processing of various HR-related activities for employees. These actions combine multiple infotypes, which are data structures in SAP HCM that store specific types of employee information.
When performing personnel actions, such as hiring a new employee, changing personal details, or updating job information, the user would select the appropriate action, which triggers the system to display a screen with relevant infotypes. The user can then enter or update the necessary data across these infotypes in a single transaction.
By using personnel actions, SAP HCM allowed for streamlined and integrated data maintenance involving multiple infotypes. It provided a standardized and efficient way to manage employee data within the HR processes and workflows. This approach facilitated consistent and accurate data entry, reduced manual effort, and ensured data integrity across different HR functions.
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how does a programmer use digital waves to transfer sound?
Answers
An analogue sound wave is picked up by a microphone and sent to an analogue to digital converter which converts the electrical signals into digital values which can be stored on a computer.
What is analogue to digital (ADC)?Analogue to Digital (ADC) is refer to as a system which converts an analog signal, such as a sound picked up by a microphone or light entering a digital camera, into a digital signal.
Once in a digital format that can edit sounds with programs such as audacity. To play digital audio convert the sound from digital values into analogue electrical signals using the DAC, these signals are then passed to a speaker that vibrating the speaker cone, moving the air to create sound waves and analogue noise.
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Answer pls pls pls pls pls
Answers
Answer:
identify materials to create a prototype
you have been asked to design a network for a large company that needs redundancy and has a large budget. which topology do you choose?
Answers
I would recommend using a mesh topology for this network. A mesh network allows for multiple paths for data to travel, providing redundancy in case of a failure in one path.
Additionally, the large budget would allow for the implementation of redundant hardware, such as multiple routers and switches, further increasing the reliability and availability of the network. A design network is a type of artificial neural network that is trained to generate or manipulate visual designs, such as images, logos, or user interfaces. These networks typically use a combination of convolutional layers, recurrent layers, and generative models to learn patterns in visual data and generate new designs based on that knowledge. Some examples of design networks include Generative Adversarial Networks (GANs) and Variational Autoencoders (VAEs).
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The sun has been up for several hours, and it has been shining on these trees.
What can the trees do because they are in sunlight? What does this mean for the number of energy storage molecules in the trees?
The trees can . . .
A. give off carbon to the air. Giving off carbon allows them to make energy storage molecules.
B. give off carbon to the air. Giving off carbon uses up energy storage molecules.
C. take in carbon from the air. The carbon is used to make energy storage molecules.
D. take in carbon from the air. The carbon is used to break down energy storage molecules.
Answers
For some hours now, the light has been beaming on these trees. Because they are in sunlight, The trees can "take in carbon from the air. The carbon is used to make energy storage molecules." (Option C).
What is the above process called?The above process is called Photosynthesis. Photosynthesis is the process through which plants convert sunlight, water, and carbon dioxide into oxygen and sugar energy.
Photosynthesis is the process through which plants and other organisms convert light energy into chemical energy, which is subsequently released to fuel the organism's activities through cellular respiration.
Photosynthesis has the following characteristics: It is a process that happens only in plants that have the green pigment chlorophyll, which is utilized to manufacture food. Sunlight, water, and oxygen are required, and two processes occur, one light-dependent and one light-independent.
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how would you configure the extended acl for scalability? in other words, how could you set up the extended acl to avoid having to modify the acl every time you add a new host?
Answers
The way to configure the extended ACL for scalability is
Using the ip access-list extended command, an extended named ACL can be configured. In Extended numbered ACL configuration and Extended numbered ACL configuration, the options at the ACL configuration level and the syntax for the ip access-group command are discussed.Extended ACLs – what are they?The guardians of your network are Extended Access Control Lists (ACLs). Depending on the protocol, port, source, destination, and time frame, they either allow or deny traffic. Customization options are abundant.
Hence, The standard ACLs require that the ACL number fall between 1 and 1999, or between 1 and 1999. An interface must be given the access list after it has been made.
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What would be the purpose of grouping worksheets in a workbook?
All formatting would be done on all sheets at once.
All header rows would be shared on all sheets at once.
All data entered would be entered on all sheets at once.
All formulas entered would be entered on all sheets at once.
Answers
Answer: A
Explanation:
Here is one way to reduce hazards to human health.Use fewer harmful chemicals,or use chemicals in a more responsible way.
Answers
Answer:
The answer is below
Explanation:
A hazard is an agent that can cause severe damage to the health of people. property or the environment at large when being exposed to the hazard.
Here are some ways in which hazard can be prevented:
Make sure that the required personal protective equipment are worn at all times.Chemicals should be used and disposed in a safe manner.There should be barriers between people and barriers such as radiation.Machines should be used to lift heavy equipment.Write a program that prompts the user to input two POSITIVE numbers — a dividend (numerator) and a divisor (denominator). Your program should then divide the numerator by the denominator, and display the quotient followed by the remainder.
Hint: If you use division (/) to calculate the quotient, you will need to use int() to remove the decimals. You can also use integer division (// ), which was introduced in Question 10 of Lesson Practice 2.3.
Once you've calculated the quotient, you will need to use modular division (%) to calculate the remainder. Remember to clearly define the data types for all inputs in your code. You may need to use float( ) , int( ), and str( ) in your solution.
float( ): Anything inputted by a user should be transformed into a float — after all, we are accepting ALL positive numbers, integers and those with decimals.
int( ): When you divide the numerator and the divisor using /, make sure that the result is an integer.
str( ): After using modular division, you can transform the quotient and remainder back into strings to display the result in the print() command.
Answers
Answer:
yes
Explanation:
(C++) Write code to complete RaiseToPower(). Sample output if userBase is 4 and userExponent is 2 is shown below. Note: This example is for practicing recursion; a non-recursive function, or using the built-in function pow(), would be more common.4^2 = 16Given: #nclude using namespace std;int RaiseToPower(int baseVal, int exponentVal){int resultVal = 0;if (exponentVal == 0) {resultVal = 1;}else {resultVal = baseVal * //your solution goes here;}return resultVal;}int main() {int userBase = 0;int userExponent = 0;userBase = 4;userExponent = 2;cout << userBase << "^" << userExponent << " = "<< RaiseToPower(userBase, userExponent) << endl;return 0;}
Answers
Answer:
Following are the code to this question:
RaiseToPower(baseVal, exponentVal-1);//calling method RaiseToPower and in second parameter we subtract value
resultVal = baseVal * RaiseToPower(baseVal, exponentVal-1);//defining resultVal variable that calculate baseVal and method value
Explanation:
In the above-given code inside the "RaiseToPower" method is defined that accepts two parameters, which are "baseVal and exponentVal" and inside the method, an integer variable "resultVal" is defined, that holds a value that is 0.
In the next step, if the conditional statement is used, in if the block it checks the "exponentVal" variable value that is equal to 0, if it is true it assigns value 1 in "resultVal" otherwise it will go to else block in this block, the "resultVal" variable holds "baseVal" variable value and call the "RaiseToPower" method, and multiply the baseVal and method and store its value in resultVal and return the value. Inside the main method, two integer variable userBase, userExponent is defined that holds a value and calls the above method and prints its return value.please find the attachment of the code file and its output.
Which word should a programmer use to describe what should happen when the condition of an if statement is NOT met?
A.
iterative
B.
when
C.
else
D.
also
Answers
The word that should a programmer use to describe what should happen when the condition of an if statement is NOT met is option C. else.
Why are conditional statements used in programming?When a condition is true or false, a conditional statement instructs a program to take a certain action. If-then or if-then-else statements are frequently used to represent it. The preceding example is a block of code that employs a "if/then" conditional statement.
Therefore, the else statement is used, "to indicate what should happen when the condition of an if statement is not fulfilled," is the proper response since the otherwise statement is typically used when computations are still necessary when a condition in an if and else-if statement is not met.
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apache spark is a general-purpose data processing engine designed to extract and process big data for a wide range of applications. what is one of its key use cases?
Answers
Answer: for streaming data, graph data, machine learning, and artificial intelligence (AI) applications
Explanation: