Every non-trivial functional dependency involving any subset of A must also have A on its left-hand side.
This means that all functional dependencies are trivial and R is in BCNF.
Therefore, the correct answer is (D) BCNF.
If (A) is the only candidate key of R(A, B, C, D), then we can see that each non-prime attribute (i.e., B, C, and D) is fully functionally dependent on A, since A is the only candidate key.
To determine the normal form of R, we need to check for functional dependencies that violate each normal form's definition.
1NF: R is in 1NF by definition since it has a primary key, and each attribute contains only atomic values.
2NF: R is in 2NF if and only if it is in 1NF and every non-prime attribute is fully functionally dependent on the candidate key.
As we have already seen, this is the case for R, since all non-prime attributes are fully functionally dependent on A, which is the only candidate key.
Thus, R is in 2NF.
3NF: R is in 3NF if and only if it is in 2NF and there are no transitive dependencies.
Since there is only one candidate key (A), there can be no transitive dependencies.
Thus, R is in 3NF.
BCNF: R is in BCNF if and only if for every non-trivial functional dependency X → Y, X is a superkey of R.
Since A is the only candidate key, it is also a superkey of R.
Therefore, every non-trivial functional dependency involving any subset of A must also have A on its left-hand side.
This means that all functional dependencies are trivial and R is in BCNF.
Therefore, the correct answer is (D) BCNF.
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Write code to define a function named mymath. The function has three arguments in the following order: Boolean, Integer, and Integer. It returns an Integer. The function will return a value as follows: 1. If the Boolean variable is True, the function returns the sum of the two integers. 2. If the Boolean is False, then the function returns the value of the first integer - the value of the second Integer.
Answer:
public class Main
{
public static void main(String[] args) {
Main m=new Main();
System.out.println(m.mymath(true,5,2)); // calling the function mymath
}
public int mymath(boolean a,int b,int c) // mymath function definition
{
if(a==true)
{
int d=b+c;
return d;
}
else{int e=b-c;
return e;
}
}
}
Assume that $s0 is initialized to 11 and $s1 is initialized to 22. Suppose you executed the code below on a version of the pipeline described in the class that does not handle data hazards. What would the final values of registers $s2 and $s3 be
The final values of registers $s2 and $s3 be $s2 = 33 and $s3 = 6.
Given MIPS instructions:I1: addi $s0, $s1, 5 #$s0 = (22 + 5) = 27
I2: sub $s2, $s0, $s1
value of register $s0 will be updated in clock cycle-5 but this instruction read value of register $s0 in clock cycle-3.$s2 = (11 + 22) = 33
I3: addi $s3, $s0, -5
value of register $s0 will be updated in clock cycle-5 but this instruction read value of register $s0 in clock cycle-4.$s3 = (11 - 5) = 6
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Intrusion detection and prevention systems can deal effectively with newly published attacks or variants of existing attacks.
Intrusion detection and prevention systems can deal effectively with newly published attacks or variants of existing attacks is False statement.
Why use an intrusion detection and prevention systems?A network intrusion detection system (NIDS) is known to be one that is very vital for network security due to the fact that it helps you to be able to know or detect and also be able to respond to any form of a malicious traffic.
Note that the primary gains of an intrusion detection system is to make sure that IT personnel are notified if an attack or network intrusion has taking or is taking place.
Hence, Intrusion detection and prevention systems can deal effectively with newly published attacks or variants of existing attacks is False statement.
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Intrusion detection consists of procedures and systems that identify system intrusions and take action when an intrusion is detected.
A) True
B) False
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14.0% complete Question The latest web application, using default settings, is currently accepting application programming interface (API) calls over HyperText Transfer Protocol (HTTP). The environment has a moderate key management system. Even with basic server security, the API connection is vulnerable to which of the following
The API connection that is vulnerable to:
Key discovery.Improper error handling.What is improper error handling?The term Improper Error Handling is known to be seen as a kind of a flaws that takes place if or when an error message that is known to be shown to an end user gives clues about how an application or website is running.
Hence, Since the environment has a moderate key management system, the API connection that is vulnerable to:
Key discovery.Improper error handling.Learn more about web application from
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If the conditional expression in a switch statement does not match any of the case values, the _________ statement executes g
Answer:
Default
Explanation:
in programming, default block executes when there are no matching
Alina is using a small database that uses just one table to store data. What type of database is Alina using?
A.
flat file database
B.
relational database
C.
hierarchical database
D.
wide column database
Alina is using a small database that uses just one table to store data and this is known to be option A: a flat file database.
What is a database with one table called?This is known to be a Flat file database. A flat file database is known to be a kind of a type of database that saves data in a single table.
Note that it is one that are generally seen in plain-text form, and it often one where each line holds only one record.
Note also that this databases is made up of a single table of data that is said to have no interrelation and thus Alina is using a small database that uses just one table to store data and this is known to be option A: a flat file database.
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A(n) ________ is the association between tables where both tables contain a common field.
A) link.
B) data model.
C) relationship.
D) share point.
Answer: Relationship
Explanation: A relationship is an association between two tables where the tables contain a common field of data.
When you use the Check Constraints dialog box, all of the constraints are created at what level so they can refer to any of the columns in the table
All of the constraints are at the table level so they can refer to any of the columns in the table.
What is Constraints dialog box?The Constraint Definition dialog box is known to be the box that a person can select from in regards to the the Radius and Diameter or Fix option.
The definition of a constraint is known to be that thing that is known to imposes what we call a limit or a form of a restriction that tends to hinder or prevents a thing from happening.
Hence, All of the constraints are at the table level so they can refer to any of the columns in the table.
Hence, option d is correct.
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When you use the Check Constraints dialog box, all of the constraints are at the which level so they can refer to any of the columns in the table?
a.
value
b.
column
c.
database
d.
table
Suppose a computer's login mechanism first asks for a user name, and then for the password, regardless of whether or not the login name is that of a valid user. Herman the Hacker has a list of 10,000 commonly used login names, and a list of 100,000 commonly used passwords. On this computer, there are 100 accounts that have both a login name on the first list and a password on the second list. For simplicity, assume that no other accounts have either a login name or password on these lists.
Herman has written code that can attempt 1000 logins per second on this computer. This program repeatedly chooses a random login name from the first list and a random password from the second list. Compute the expected number of seconds it will take Herman to break into some account on the machine, and identify that number from the list below.
Hint: Since names and passwords are chosen randomly, repetitions are possible. It may indeed be easier to forget what names/passwords have been tried than to keep a list of what has been tried and avoid duplicate attempts. As a result, there is an easy formula for the expected number of tries. If the probability of success on any given try is p, then the expected number of tries until the first success is exactly 1/p.
A. 1.1
B. 100.1
C. 10,000
D. 1000.1
The expected number of seconds it will take Herman to break into (or hack) some account on the machine is 1.1 seconds. (Option A) See the explanation below.
What does it mean to hack a machine?The act of subverting digital systems and networks by gaining unauthorized access to a computer system or account is a popular definition of hacking.
Although hacking is not always harmful, it is most frequently linked to online crime and data theft by cybercriminals.
What is the explanation for the above answer?With 10,000 login names available, we can assume that 100 of them are accurate, as the question suggests.
The likelihood of receiving the proper login name is therefore
P 1 = 100 10,000
P1 = 0.01
In the same vein, among 100,000 password we can assume that only 100 are correct, therefore, the probability of getting the right password is.
P 2 = 100 ÷ 100,000
P2 = 0.001
That that where the probability of success on any given try is p, then the expected number of tries until the first success is exactly 1 ÷ P.
Therefore, the expected number of trials before the first successful login name is = 1÷ P11
= 1 ÷ 0.01
= 100
The above also works for the password:
1÷ P2
= 1 ÷ 0.001
=1000
Therefore, it will take 100+ 1000 = 1100 attempts to finally get the initial login name and password.
Given that Henrietta created programming that allows this computer to try 1000 logins every second.
Therefore, 1100 x 1000 sec = 1.1 sec is the anticipated time it will take Henrietta to gain access to a machine account.
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The expected number of seconds that will take to Herman to break into some account on the machine is 10.000. So Letter C.
Firstly, the probability of finding a correct login name (100) out of first list (1000) = 100/1000 = 1/100.
Second, After finding a login name, exactly one password will correspond to the found login name. As both the events are independent, hence:
Probability(p) = 1/100 x 1/100000 = 1/10000000.
Therefore, expected numbers of tries = 1/p = 10000000.
The code can attempt 1000 tries per second. So the expected numbers os seconds that will take to Herman break into some account will be:
10000000/1000 = 10.000.
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What are the main advantages of the d-step tuning of 2023 murano’s xtronic cvt®?.
The main advantages of the d-step tuning of 2023 Murano's xtronic cvt is that:
It gives room for the transmission to quickly change ratios in regards to quick acceleration.When at higher rpm, it help one to stepped acceleration via the use of linear acceleration feel.What kind of transmission does a Nissan Murano have?It is known to have a continuously variable automatic transmission (CVT) and it is one whose only engine is said to give about a 3.5-liter V-6 that helps to bring about a lot of power.
Note that the main advantages of the d-step tuning of 2023 Murano's xtronic cvt is that:
It gives room for the transmission to quickly change ratios in regards to quick acceleration.When at higher rpm, it help one to stepped acceleration via the use of linear acceleration feel.Learn more about cars from
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Question In an existing company database, the customers table contains the following columns: CustomerId, FirstName, LastName, Company, Address, City, State, Country, PostalCode, Phone, Fax, Email, and SupportRepId.
Using the knowledge in computational language in SQL it is possible to write a code that existing company database, the customers table contains.
Writting the code in SQL:SELECT FirstName,
LastName,
HireDate,
(STRFTIME('%Y', 'now') - STRFTIME('%Y', HireDate))
- (STRFTIME('%m-%d', 'now') < STRFTIME('%m-%d', HireDate))
AS YearsWorked
FROM Employees
WHERE YearsWorked >= 15
ORDER BY LastName ASC
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What is a method for confirming users’ identities?
Answer: Authentication
Explanation:
A video production company uploads large video files to s3 buckets using multipart upload. To which aws cloud best practice does this adhere?
The think parallel is the AWS cloud best practice that this adheres to.
What is the AWS cloud practice?This is the term that is used to refer to Amazon cloud services. It is one of the most popularly known cloud service around the world. It helps by giving the opportunity for the delivery of IT based services and other technologies through the pay as you go basis.
It helps by providing the use of different forms of processing capabilities and other forms of services that are useful to business.
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Error: At least one of the class levels is not a valid R variable name; This will cause errors when class probabilities are generated because the variables names will be converted to X0, X1 . Please use factor levels that can be used as valid R variable names (see ?make.names for help).
Using the knowledge in computational language in JAVA it is possible to write a code that use factor levels that can be used as valid R variable names
Writting the code in JAVA:method = "repeatedcv"
, number = 10
, repeats = 1
, verboseIter = TRUE
, summaryFunction = fivestats
, classProbs = TRUE
, allowParallel = TRUE)
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A technician needs to upgrade the RAM in a database server. The server's memory must support maintaining the highest levels of integrity. Which of the following type of RAM should the technician install
If the technician needs to upgrade the RAM in a database server, the type of RAM that the technician need to install is ECC (Error correction code).
What is the server about?An error correcting code (ECC) is known to be a kind of an encoding scheme that moves messages as a kind of a binary numbers.
Note that it often does this in a way that the message is one that can be gotten back even if a little or some bits are said to be erroneously flipped.
Hence, If the technician needs to upgrade the RAM in a database server, the type of RAM that the technician need to install is ECC (Error correction code).
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A technician needs to upgrade the RAM in a database server. The server's memory must support maintaining the highest levels of integrity. Which of the following type of RAM should the technician install?
ECC (Error correction code)
Parity
Non-parity
SODIMM
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Unlike linux and mac systems, on a windows system, the ping command sends how many echo requests?
Unlike Linux and mac systems, on a windows system, the ping command sends how many echo requests: 4 echo requests.
What is an Echo Request?This refers to the computer protocol that is used to send requests to another computer network until an acknowledgment has been received and is used to check for the availability of another system.
Hence, we can see that on the Linux and mac systems, the echo requests are sent until a ping is received, but with a Windows system, there is only 4 echo requests used.
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How can you ensure that your internet search is happening over a secure network connection?.
A person can you ensure that your internet search is happening over a secure network connection by the use of:
By Renaming your Routers and Networks.The use of a strong passwords.Do Turn on encryption.The use of multiple firewalls.What is secure network connection?A secure connection is known to be a kind of a connection that is known to be one that is often encrypted by the use of a single or a lot of security protocols to make sure that the security of data that is known to be passing between two or more nodes.
Therefore, based on the above scenario, A person can you ensure that your internet search is happening over a secure network connection by the use of:
By Renaming your Routers and Networks.The use of a strong passwords.Do Turn on encryption.The use of multiple firewalls.Learn more about internet search from
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There are many different ways to ensure search engine optimization. Select the three that are included in the list.
a. Use keywords in Flash or JavaScript directed text. b. Use your keywords when writing descriptions of hyperlinks. c. Include as many pictures and videos as possible. d. Ask visitors to bookmark your site.
Include a < meta > tag in your header. Include a < meta > tag in your header.
The many ways to ensure search engine optimization SEO are options A, B and E:
Use your keywords when writing descriptions of hyperlinks.Use keywords in Flash or JavaScript-directed text.Include a < meta > tag in your header.What is search engine optimization?This is known to be the process of maximizing the number of visitors to a particular website by ensuring that the site appears high on the list of results returned by a search engine.
As SEO is the process of improving the quality and quantity of website traffic to a website or a web page from search engines, so is the process of ensuring that it works important.
Metadata gives a summary of basic information about data which makes finding & working with particular information much easier.
Hence, the correct answers are options A, B and E.
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Answer:
THREE ANSWERS
b. Use your keywords when writing descriptions of hyperlinks.
d. Ask visitors to bookmark your site.
e. Include a < meta > tag in your header.
define the term spread sheet
Answer:
A spreadsheet is a computer application for computation, organization, analysis and storage of data in tabular form. Spreadsheets were developed as computerized analogs of paper accounting worksheets. The program operates on data entered in cells of a table.
Explanation:
What is the purpose of the package dependencies, such as those we declare in pubspec.yaml?
The purpose of the package dependencies is to provide additional functionality, which are usually downloaded from pub.
What are Package dependencies?This is referred to another package that your package needs in order to work thereby increasing its functionality. This therefore denotes a direct relationship between the both of them in this type of scenario.
It is also usually downloaded from pub and are specified in the pubspec thereby making its ability to provide additional functions due to the presence of the other and is therefore the most appropriate choice in this type of scenario.
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Which types of attacks are thwarted by complex passwords that are combinations of upper and lower case letters, numbers, and special characters
The types of attacks that are known to be thwarted by complex passwords that are combinations of upper and lower case letters, numbers, and special characters are said to be Brute Force Attacks.
What is Brute Force Attacks?
This is known to be an attack that is said to be a very crude type of attack and it is often seen as a brute-force attack.
Note that is one that does not depend on lists of passwords, but it is one that often tries all the very possible combinations of permitted character types.
Hence, this type of attack was known to be historically seen as ineffective, and it is said to be The types of attacks that are known to be thwarted by complex passwords that are combinations of upper and lower case letters, numbers, and special characters are said to be Brute Force Attacks.
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For developing a mis in your business organization, you intend to launch a new is department or team. how the is function will support your business? what roles will you assign to different hired/reassigned members of the is-team. (budget is not be considered)
The function will support my business because it will help in decision making.
What is the importance of Management Information System?Management Information System can be described as the collection of Organized data that can help the organization in decision making.
Making a good decision , it will help the company to compete excellently with great profit.
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We wish to compute the laziest way to dial given n-digit number on a standard push-button telephone using two fingers. we assume that the two fingers start out on the * and # keys, and that the effort required to move a finger from one button to another is proportional to the euclidean distance between them. design and analyze an algorithm that computes in time o(n) the method of dialing that involves moving your fingers the smallest amount of total distance
Answer:
R(i, k) + dist(d[k], d[i+1]) over all k < i
Explanation:
In a(n) _____ access file structure, records can be accessed in any order, regardless of their physical locations in storage media
In a(n) random access file structure, records can be accessed in any order, regardless of their physical locations in storage media.
What is random access file structure?A Random file access is known to be a form of a superimposed method that is used in a lot of Java code so that one can be able to access specific records directly and fast without searching via records in the file.
Therefore, In a(n) random access file structure, records can be accessed in any order, regardless of their physical locations in storage media.
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Consider the following method. public boolean checkIndexes(double[][] data, int row, int col) { int numRows
The variable declaration and initialization, that appears in a method in the same class as checkIndexes is checkIndexes(table, 4, 5).
What is declaration of a variable?Declaration of a variable is known to be a function or work that is seen in computer programming language.
This is known to be a form of a statement that is known to be often used to state or specify the variable in regards to its name and that of its data type.
Note that the Declaration is known to be one that informs the compiler about the presence of an entity in that program and where one can find it.
Hence, The variable declaration and initialization, that appears in a method in the same class as checkIndexes is checkIndexes(table, 4, 5).
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Consider the following method.
public boolean checkIndexes(double[][] data, int row, int col)
{
int numRows = data.length;
if (row < numRows)
{
int numCols = data[0].length;
return col < numCols;
}
else
{
return false;
}
}
Consider the following variable declaration and initialization, which appears in a method in the same class as checkIndexes.
double[][] table = new double[5][6];
Which of the following method calls returns a value of true ?
A checkIndexes(table, 4, 5)
B checkIndexes(table, 4, 6)
C checkIndexes(table, 5, 4)
D checkIndexes(table, 5, 6)
E checkIndexes(table, 6, 5)
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When you log into a website that uses a directory service, what command authenticates your username and password?
When you log into a website that uses a directory service, The Bind command authenticates your username and password.
What is the Bind command?The Bind command is known to be seen as the Bash shell builtin command.
Note that this is a term that is often used to set Readline key bindings and also that of its variables.
Note that the keybindings are seen as the keyboard works or actions that are said to be bound to a function.
Note also that it can be used to alter how the bash will act to keys or combinations of keys and thus, When you log into a website that uses a directory service, The Bind command authenticates your username and password.
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A network designer wants to run a 10 gigabit backbone between two switches in buildings that are 75 m (246 feet) apart. What is the main consideration when selecting an appropriate copper cable?
The main consideration when selecting an appropriate copper cable is that:
At that given distance, one can use some kinds of shielded or screened cat 6A or one can use a cable which is said to be needed for the installation to be in line with Ethernet standard 10GBASE-T.
What are the types of copper cables?Copper cable are known to often electrical signals to transmit data between some or a given networks.
Note that there are three types of copper cable which are:
coaxial, unshielded twisted pair shielded twisted pair.Copper is said to be a kind of electrical conductor in a lot of categories of electrical wiring and so The main consideration when selecting an appropriate copper cable is that:
At that given distance, one can use some kinds of shielded or screened cat 6A or one can use a cable which is said to be needed for the installation to be in line with Ethernet standard 10GBASE-T.
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Why does the use of passwords put the overall security of the network in jeopardy?
You have been asked to configure a client-side virtualization solution with three guest oss. Each one needs internet access. How should you configure the solution in the most cost-effective way?
The most cost-effective way to configure a client-side virtualization solution is by using one (1) physical NIC, three (3) virtual NICs, and one (1) virtual switch.
What is virtualization?Virtualization refers to the creation of an abstraction layer over computer hardware through the use of a software, in order to enable the operating system (OS), storage device, server, etc., to be used by end users.
In this scenario, the most cost-effective way to configure a client-side virtualization solution is by using one (1) physical network interface card (NIC), three (3) virtual network interface cards (NICs), and one (1) virtual switch.
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Which principle is in effect when an analyst has a lower level of access than a client account lead (cal) working on the same project?
The The Principle of Least Privilege is known to be the principle that is in effect when an analyst has a lower level of access than a client account lead (cal) working on the same project.
What is the Principle of Least Privilege?The Principle of Least Privilege is known to be one that tells that a subject is one that need to be given only those privileges that are said to be required for it to complete its task.
Note that If a subject is not able to or do not need an access right, the subject is one that need not to have that right. hence, the function of the subject should be the one that will control the assignment of rights.
Therefore, in regards to the above, The The Principle of Least Privilege is known to be the principle that is in effect when an analyst has a lower level of access than a client account lead (cal) working on the same project.
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