All lowercase letters should be used in variable names, and underscores should be used to separate words. These accepted stylistic principles aid in readable coding.
What conventions should be adhered to while naming variables?A variable name must be preceded by a letter or the underscore symbol ( ). No name for a variable can begin with a number. Only underscores (_), a-z, A-Z, 0-9, and alphanumeric characters are permitted in variable names. Variable names are case-sensitive (age, Age and AGE are three different variables)
What is the standard Java naming convention for the identifier ?Each and every identifier must start with a letter (from A to Z or a to z), a dollar sign ($), or an underscore ( ). Identifiers can have additional characters after the first one.
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Which of the following describes a codec? Choose all that apply.
a computer program that saves a digital audio file as a specific audio file format
short for coder-decoder
converts audio files, but does not compress them
Answer:
A, B
Explanation:
What is the difference between an information system and a computer application?
Answer:
An information system is a set of interrelated computer components that collects, processes, stores and provides output of the information for business purposes
A computer application is a computer software program that executes on a computer device to carry out a specific function or set of related functions.
What is a foreign key? a security key to a database that stores foreign data a security key to a database located in another country a field in a table that uniquely identifies a record in a relational database a field in a table that links it to other tables in a relational database
Answer: a field in a table that links it to other tables in a relational database
A - a security key to a database that stores foreign data
examples of pop in computer
Answer:
Short for Post Office Protocol, POP or POP mail is one of the most commonly used protocols used to receive e-mail on many e-mail clients. There are two different versions of POP: POP2 and POP3. POP2was an early standard of POP that was only capable of receiving e-mail and required SMTP to send e-mail. POP3 is the latest standard and can send and receive e-mail only using POP, but can also be used to receive e-mail and then use SMTP to send e-mail.
Before hard disk drives were available, computer information was stored on:
Floppy Disks
Cassette Tapes
Punch Cards
All of the Above
This lab was designed to teach you more about using Scanner to chop up Strings. Lab Description : Take a group of numbers all on the same line and average the numbers. First, total up all of the numbers. Then, take the total and divide that by the number of numbers. Format the average to three decimal places Sample Data : 9 10 5 20 11 22 33 44 55 66 77 4B 52 29 10D 50 29 D 100 90 95 98 100 97 Files Needed :: Average.java AverageRunner.java Sample Output: 9 10 5 20 average = 11.000 11 22 33 44 55 66 77 average = 44.000 48 52 29 100 50 29 average - 51.333 0 average - 0.000 100 90 95 98 100 97 average - 96.667
Answer:
The program is as follows:
import java.util.*;
public class Main{
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
String score;
System.out.print("Scores: ");
score = input.nextLine();
String[] scores_string = score.split(" ");
double total = 0;
for(int i = 0; i<scores_string.length;i++){
total+= Double.parseDouble(scores_string[i]); }
double average = total/scores_string.length;
System.out.format("Average: %.3f", average); }
}
Explanation:
This declares score as string
String score;
This prompts the user for scores
System.out.print("Scores: ");
This gets the input from the user
score = input.nextLine();
This splits the scores into an array
String[] scores_string = score.split(" ");
This initializes total to 0
double total = 0;
This iterates through the scores
for(int i = 0; i<scores_string.length;i++){
This calculates the sum by first converting each entry to double
total+= Double.parseDouble(scores_string[i]); }
The average is calculated here
double average = total/scores_string.length;
This prints the average
System.out.format("Average: %.3f", average); }
}
SOMEONE PLS HELP?!?!!
Answer:
B. To continuously check the state of a condition.
Explanation:
The purpose of an infinite loop with an "if" statement is to constantly check if that condition is true or false. Once it meets the conditions of the "if" statement, the "if" statement will execute whatever code is inside of it.
Example:
//This pseudocode will print "i is even!" every time i is an even number
int i = 0;
while (1 != 0) //always evaluates to true, meaning it loops forever
i = i + 1; // i gets incrementally bigger with each loop
if ( i % 2 == 0) //if i is even....
say ("i is even!"); //print this statement
To add musical notes or change the volume of sound, use blocks from.
i. Control ii. Sound iii. Pen
How was the first computer reprogrammed
Answer:
the first programs were meticulously written in raw machine code, and everything was built up from there. The idea is called bootstrapping. ... Eventually, someone wrote the first simple assembler in machine code.
Explanation:
Write a SELECT statement that displays each product purchased, the category of the product, the number of each product purchased, the maximum discount of each product, and the total price from all orders of the item for each product purchased. Include a final row that gives the same information over all products (a single row that provides cumulative information from all your rows). For the Maximum Discount and Order Total columns, round the values so that they only have two decimal spaces. Your result
Answer:
y6ou dont have mind
Explanation:
Create a recursive procedure named (accumulator oddsum next). The procedure will return the sum of the odd numbers entered from the keyboard. The procedure will read a sequence of numbers from the keyboard, where parameter oddsum will keep track of the sum from the odd numbers entered so far and parameter next will (read) the next number from the keyboard.
Answer:
Explanation:
The following procedure is written in Python. It takes the next argument, checks if it is an odd number and if so it adds it to oddsum. Then it asks the user for a new number from the keyboard and calls the accumulator procedure/function again using that number. If any even number is passed the function terminates and returns the value of oddsum.
def accumulator(next, oddsum = 0):
if (next % 2) != 0:
oddsum += next
newNext = int(input("Enter new number: "))
return accumulator(newNext, oddsum)
else:
return oddsum
Animation timing is does not affect the
speed of the presentation
Select one:
True
False
Answer:
True
Explanation:
I think it's true.....
Discuss the relationship of culture and trends?
Which of the following techniques is a direct benefit of using Design Patterns? Please choose all that apply Design patterns help you write code faster by providing a clear idea of how to implement the design. Design patterns encourage more readible and maintainable code by following well-understood solutions. Design patterns provide a common language / vocabulary for programmers. Solutions using design patterns are easier to test
Answer:
Design patterns help you write code faster by providing a clear idea of how to implement the design
Explanation:
Design patterns help you write code faster by providing a clear idea of how to implement the design. These are basically patterns that have already be implemented by millions of dev teams all over the world and have been tested as efficient solutions to problems that tend to appear often. Using these allows you to simply focus on writing the code instead of having to spend time thinking about the problem and develop a solution. Instead, you simply follow the already developed design pattern and write the code to solve that problem that the design solves.
An example of a host-based intrusion detection tool is the tripwire program. This is a file integrity checking tool that scans files and directories on the system on a regular basis and notifies the administrator of any changes. It uses a protected database of cryptographic checksums for each file checked and compares this value with that recomputed on each file as it is scanned. It must be configured with a list of files and directories to check and what changes, if any, are permissible to each. It can allow, for example, log files to have new entries appended, but not for existing entries to be changed. What are the advantages and disadvantages of using such a tool? Consider the problem of determining which files should only change rarely, which files may change more often and how, and which change frequently and hence cannot be checked. Hence consider the amount of work in both the configuration of the program and on the system administrator monitoring the responses generated.
Answer:
The main problem with such a tool would be resource usage
Explanation:
The main problem with such a tool would be resource usage. Such a tool would need a large amount of CPU power in order to check all of the files on the system thoroughly and at a fast enough speed to finish the process before the next cycle starts. Such a program would also have to allocate a large amount of hard drive space since it would need to temporarily save the original versions of these files in order to compare the current file to the original version and determine whether it changed or not. Depending the amount of files in the system the work on configuring the program may be very extensive since each individual file needs to be analyzed to determine whether or not they need to be verified by the program or not. Monitoring responses may not be so time consuming since the program should only warn about changes that have occurred which may be only 10% of the files on a daily basis or less.
Suppose you are choosing between the following three algorithms:
• Algorithm A solves problems by dividing them into five subproblems of half the size, recursively solving each subproblem, and then combining the solutions in linear time.
• Algorithm B solves problems of size n by recursively solving two subproblems of size n − 1 and then combining the solutions in constant time.
• Algorithm C solves problems of size n by dividing them into nine sub-problems of size n=3, recursively solving each sub-problem, and then combining the solutions in O(n2) time.
What are the running times of each of these algorithms (in big-O notation), and which would you choose?
Answer:
Algorithm C is chosen
Explanation:
For Algorithm A
T(n) = 5 * T ( n/2 ) + 0(n)
where : a = 5 , b = 2 , ∝ = 1
attached below is the remaining part of the solution
How does it relate
to public domain
and fair use?
Complete the problem about Olivia, the social worker, in this problem set. Then determine the telecommunications tool that would best meet Olivia's needs.
PDA
VoIP
facsimile
Internet
Answer:
PDA is the correct answer to the following answer.
Explanation:
PDA refers for Programmable Digital Assistant, which is a portable organizer that stores contact data, manages calendars, communicates via e-mail, and manages documents and spreadsheets, typically in conjunction with the user's personal computer. Olivia needs a PDA in order to communicate more effectively.
Which of the following transfer rates is the FASTEST?
1,282 Kbps
O 1,480 Mbps
1.24 Gbps
181 Mbps
Answer:
The correct answer is 1,480 Mbps.
Explanation:
For this you have to know how to convert bytes to different units.
1,000 Bytes (b) = 1 Kilobyte (Kb)
1,000 Kilobyte (Kb) = 1 Megabyte (Mb)
1,000 Megabytes (Mb) = 1 Gigabyte (Gb)
and Finally, 1,000 Gigabytes (Gb) = 1 Terrabyte (Tb)
Answer:
1,480 Mbps
Explanation:
1,480 Mbps is equal to 1.48 Gbps, and so it is the fastest transfer rate listed because it is greater than 1.24 Gbps. In summary, 1,480 Mbps > 1.24 Gbps > 181 Mbps > 1,282 Kbps.
Which of the follwing are examples of meta-reasoning?
A. She has been gone long so she must have gone far.
B. Since I usually make the wrong decision and the last two decisions I made were correct, I will reverse my next decision.
C. I am getting tired so I am probably not thinking clearly.
D. I am getting tired so I will probably take a nap.
Answer: B. Since I usually make the wrong decision and the last two decisions I made were correct, I will reverse my next decision.
C. I am getting tired so I am probably not thinking clearly
Explanation:
Meta-Reasoning simply refers to the processes which monitor how our reasoning progresses and our problem-solving activities and the time and the effort dedicated to such activities are regulated.
From the options given, the examples of meta reasoning are:
B. Since I usually make the wrong decision and the last two decisions I made were correct, I will reverse my next decision.
C. I am getting tired so I am probably not thinking clearly
Create a list of 30 words, phrases and company names commonly found in phishing messages. Assign a point value to each based on your estimate of its likeliness to be in a phishing message (e.g., one point if it’s somewhat likely, two points if moderately likely, or three points if highly likely). Write a program that scans a file of text for these terms and phrases. For each occurrence of a keyword or phrase within the text file, add the assigned point value to the total points for that word or phrase. For each keyword or phrase found, output one line with the word or phrase, the number of occurrences and the point total. Then show the point total for the entire message. Does your program assign a high point total to some actual phishing e-mails you’ve received? Does it assign a high point total to some legitimate e-mails you’ve received?
Answer:
Words found in phishing messages are:
Free gift
Promotion
Urgent
Congratulations
Check
Money order
Social security number
Passwords
Investment portfolio
Giveaway
Get out of debt
Ect. this should be a good starting point to figuring out a full list
Earl develops a virus tester which is very good. It detects and repairs all known viruses. He makes the software and its source code available on the web for free and he also publishes an article on it. Jake reads the article and downloads a copy. He figures out how it works, downloads the source code and makes several changes to enhance it. After this, Jake sends Earl a copy of the modified software together with an explanation. Jake then puts a copy on the web, explains what he has done and gives appropriate credit to Earl.
Discuss whether or not you think Earl or Jake has done anything wrong?
Answer:
They have done nothing wrong because Jake clearly gives credit to Earl for the work that he did
Explanation:
Earl and Jake have nothing done anything wrong because Jake give the proper credit to Earl.
What is a virus tester?A virus tester is a software that scan virus on computer, if any site try to attack any computer system, the software detect it and stop it and save the computer form virus attack.
Thus, Earl and Jake have nothing done anything wrong because Jake give the proper credit to Earl.
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the
Wnte
that
Program
will accept three
Values of
sides of a triangle
from
User and determine whether Values
carceles, equal atera or sealen
- Outrast of your
a
are for
an
Answer:
try asking the question by sending a picture rather than typing
Joseph learned in his physics class that centimeter is a smaller unit of length and a hundred centimeters group to form a larger unit of length called a meter. Joseph recollected that in computer science, a bit is the smallest unit of data storage and a group of eight bits forms a larger unit. Which term refers to a group of eight binary digits? A. bit B. byte O C. kilobyte D. megabyte
Answer:
byte
Explanation:
A byte is made up of eight binary digits
A non-profit organization decides to use an accounting software solution designed for non-profits. The solution is hosted on a commercial provider's site but the accounting information suchas the general ledger is stored at the non-profit organization's network. Access to the software application is done through an interface that uses a coneventional web browser. The solution is being used by many other non-profit. Which security structure is likely to be in place:
Answer:
A firewall protecting the software at the provider
Explanation:
The security structure that is likely to be in place is :A firewall protecting the software at the provider
Since the access to the software application is via a conventional web browser, firewalls will be used in order to protect against unauthorized Internet users gaining access into the private networks connected to the Internet,
Write the Java classes for the following classes. Make sure each includes 1. instance variables 2. constructor 3. copy constructor Submit a PDF with the code The classes are as follows: Character has-a name : String has-a health : integer has-a (Many) weapons : ArrayList has-a parent : Character has-a level : Level (this should not be a deep copy) Level has-a name : String has-a levelNumber : int has-a previousLevel : Level has-a nextLevel : Level Weapon has-a name : String has-a strength : double Monster is-a Character has-a angryness : double has-a weakness : Weakness Weakness has-a name : String has-a description: String has-a amount : int
Answer:
Explanation:
The following code is written in Java. It is attached as a PDF as requested and contains all of the classes, with the instance variables as described. Each variable has a setter/getter method and each class has a constructor. The image attached is a glimpse of the code.
Write a line of code that declares a variable called shipName and set it equal to the string SpaceX3000.
Answer:
shipName = "SpaceX3000"
Explanation:
In java I need help on this specific code for this lab.
Problem 1:
Create a Class named Array2D with two instance methods:
public double[] rowAvg(int[][] array)
This method will receive a 2D array of integers, and will return a 1D array of doubles containing the average per row of the 2D array argument.
The method will adjust automatically to different sizes of rectangular 2D arrays.
Example: Using the following array for testing:
int [][] testArray =
{
{ 1, 2, 3, 4, 6},
{ 6, 7, 8, 9, 11},
{11, 12, 13, 14, 16}
};
must yield the following results:
Averages per row 1 : 3.20
Averages per row 2 : 8.20
Averages per row 3 : 13.20
While using this other array:
double[][] testArray =
{
{1, 2},
{4, 5},
{7, 8},
{3, 4}
};
must yield the following results:
Averages per row 1 : 1.50
Averages per row 2 : 4.50
Averages per row 3 : 7.50
Averages per row 4 : 3.50
public double[] colAvg(int[][] array)
This method will receive a 2D array of integers, and will return a 1D array of doubles containing the average per column of the 2D array argument.
The method will adjust automatically to different sizes of rectangular 2D arrays.
Example: Using the following array for testing:
int [][] testArray =
{
{ 1, 2, 3, 4, 6},
{ 6, 7, 8, 9, 11},
{11, 12, 13, 14, 16}
};
must yield the following results:
Averages per column 1: 6.00
Averages per column 2: 7.00
Averages per column 3: 8.00
Averages per column 4: 9.00
Averages per column 5: 11.00
While using this other array:
double[][] testArray =
{
{1, 2},
{4, 5},
{7, 8},
{3, 4}
};
must yield the following results:
Averages per column 1: 3.75
Averages per column 2: 4.75
My code is:
public class ArrayDemo2dd
{
public static void main(String[] args)
{
int [][] testArray1 =
{
{1, 2, 3, 4, 6},
{6, 7, 8, 9, 11},
{11, 12, 13, 14, 16}
};
int[][] testArray2 =
{
{1, 2 },
{4, 5},
{7, 8},
{3,4}
};
// The outer loop drives through the array row by row
// testArray1.length has the number of rows or the array
for (int row =0; row < testArray1.length; row++)
{
double sum =0;
// The inner loop uses the same row, then traverses all the columns of that row.
// testArray1[row].length has the number of columns of each row.
for(int col =0 ; col < testArray1[row].length; col++)
{
// An accumulator adds all the elements of each row
sum = sum + testArray1[row][col];
}
//The average per row is calculated dividing the total by the number of columns
System.out.println(sum/testArray1[row].length);
}
} // end of main()
}// end of class
However, it says there's an error... I'm not sure how to exactly do this type of code... So from my understanding do we convert it?
Answer:
Explanation:
The following code is written in Java and creates the two methods as requested each returning the desired double[] array with the averages. Both have been tested as seen in the example below and output the correct output as per the example in the question. they simply need to be added to whatever code you want.
public static double[] rowAvg(int[][] array) {
double result[] = new double[array.length];
for (int x = 0; x < array.length; x++) {
double average = 0;
for (int y = 0; y < array[x].length; y++) {
average += array[x][y];
}
average = average / array[x].length;
result[x] = average;
}
return result;
}
public static double[] colAvg(int[][] array) {
double result[] = new double[array[0].length];
for (int x = 0; x < array[x].length; x++) {
double average = 0;
for (int y = 0; y < array.length; y++) {
average += array[y][x];
}
average = average / array.length;
result[x] = average;
}
return result;
}
Suppose you have the following search space:
State
next
cost
A
B
4
A
C
1
B
D
3
B
E
8
C
C
0
C
D
2
C
F
6
D
C
2
D
E
4
E
G
2
F
G
8
Draw the state space of this problem.
Assume that the initial state is A and the goal state is G. Show how each of the following search strategies would create a search tree to find a path from the initial state to the goal state:
Breadth-first search
Depth-first search
Uniform cost search
Breadth
Depth
Uniform
U
To use cache memory main memory are divided into cache lines typically 32 or 64 bytes long.an entire cache line is cached at once what is the advantage of caching an entire line instead of single byte or word at a time?
Answer:
The advantage of caching an entire line in the main memory instead of a single byte or word at a time is to avoid cache pollution from used data
Explanation:
The major advantage of caching an entire line instead of single byte is to reduce the excess cache from used data and also to take advantage of the principle of spatial locality.