Please answer in JAVA

I am using java.time.Duration class.

1.). How can I add all of the given duration time?

for example:

Duration t1 = Duration.ofMinutes(2).plusSeconds(30)

Duration t2 = Duration.ofMinutes(3).plusSeconds(20)

then the result would be total = Duration.ofMinutes(5).plusSeconds(50)

*** and how would it be if it exceeds 59 minutes and its an hour.

2). How would I be able to add it all up on an ArrayList? does a for loop and simple add() works?

You have been tasked to write a C# application that will go through the first step of encrypting an input file and writing the encrypted contents to an output file.

For this first step in encryption, read each letter in from the input file, add 3 letters to the value of the input letter. If the input letter is an A then the encrypted letter would be a D. If the input letter from the input file is an X then the encrypted letter would be an A.
All spaces, digits, punctuation, and special characters do not need to be encrypted at this level.   Simply write the space, punctuation, or special character to the output file as is.
If a letter is uppercase in the input file, it should remain as an uppercase character in the output file. If a letter is lowercase in the input file, it should remain as a lowercase character in the output file.

Since this program runs each month, the input file will be of various lengths; therefore, the program will read until end of file.

The input file is found in the current directory and is named October20.txt.   The output file will be written to the current directory and named EncryptOct20.txt.

An example:

If the contents of the input file is

The output file would be:

What the user should see when the program executes:


When the program begins, the statement "Encryption Level 1" should be displayed.
The focus should be set to the "Begin Encryption" button.
When the user clicks the "Begin Encryption" button, the program opens the input file, the statement "Opening input file...." should be displayed. The "Begin Encryption" button should be disabled.
When the program begins reading through the input file encrypting the contents, the statement "Encrypting input file...." should be displayed.
When the program closes the input and output files, the statement "Encryption complete...." should be displayed.
When the program is complete, the statement "End of process" should be displayed.

course: IT Data Mining and Data Warehousing

There are several typical cube computation methods such as Multi-Way, BUC, and Star-cubing. Briefly describe each one of these methods outlining the key points.

note: need a unique answer and no handwriting please.

After your successful engagement to develop privacy and personal data protection strategies for DAS, you have been engaged by the Department of Health (DoH) to advise on the development of privacy and data protection for CovidSafe users. DoH expect up to 16 million Australian mobile users to download and use this app. DoH have announced that they will be using a major U.S. based public cloud provider to host the CovidSafe data, but claim that the data will always be under Australian Government control.

You are to provide a report to DoH that:

1. Discusses the possible threats and risks to the security of user data on mobile phones, and in linked Cloud and financial accounts from the use of the CovidSafe app.
2. Discusses the possible threats to the privacy of a user's data, location and activities from the use of the CovidSafe app.
3. Discusses the issues of data sovereignty that may apply to the storage of CovidSafe data in U.S. based Cloud storage.
4. You are to recommend that DoH adopt:
   1. Possible security controls that would prevent the loss or breach of user data, while still enabling effective tracking for COVID-19, and the reasons these controls will be effective.
   2. Possible privacy controls to protect user privacy, particularly of data, location and activity, while still enabling effective tracking of COVID-19, and the reasons these controls will be effective.
   3. Possible controls to ensure that the CovidSafe data remains under Australian data sovereignty and control, and the reasons these controls will be effective.

Mention any three reconnaissance techniques. Briefly explain each of them (just one or two sentences). Why reconnaissance is a threat to network security?

I. Answer part A,B, C and D.

1a)

Count the number of times a given char occurs in a given range of a String parameter (i.e. starting at a given start index, and up to but not including and end index). If end is greater than the length of the String, then the method should stop looking at the end of the String.

countCharsInRange("java", "v", 1, 2) → 0
countCharsInRange("java", "v", 0, 2) → 0
countCharsInRange("java", "v", 0, 3) → 1

1b)

Return a new String that removes all copies of the given char ch from the given String

removeChar("dog", "o") → "dg"
removeChar("cat", "o") → "cat"
removeChar("aaa", "a") → ""

1c)

Return the number of times the letter 'a' is directly followed by the letter 'b' in the given String.

countAB("abc") → 1
countAB("wxyz") → 0
countAB("bcaca") → 0

1d)

Return a new String that is a copy of the given String with each character copied the given number of times. Assume that n is 0 or more.

eachCharNTimes("abc", 2) → "aabbcc"
eachCharNTimes("xyz", 3) → "xxxyyyzzz"
eachCharNTimes("a", 5) → "aaaaa"

Project : facial recognition system

use the DEEP method to reflective writing. The four steps in this method are:

• 2.1 D - Describe experience (past or present).
  1. Describe the problem
• 2.2 E - Explore or consolidate new learning
  1. Read/Research about the problem
• 2.3 E - Evaluate/analyse/self reaction
• 2.4 P - Plan future learning

How would you describe some of the ER design limitations, and discuss how understanding these limitations will influence how you choose to model a particular situation so that you are able to represent the things that are most important?

Consider an array A[1 · · · n] which is sorted and then rotated k steps to the right. For example, we might start with the sorted array [1, 4, 5, 9, 10], and rotate it right by k = 3 steps to get [5, 9, 10, 1, 4]. Give an O(log n)-time algorithm that finds and returns the position of a given element x in array A, or returns None if x is not in A. Your algorithm is given the array A[1 · · · n] but does not know k. You can use C, C++, Java, or Python to solve this problem (ask the instructor if you have another programming language in mind). Python3 pls

*** Using Python ***

Your program must prompt the user for their city or zip code and request weather forecast data from openweathermap.org. Your program must display the weather information in an READABLE format to the user.

Requirements:

• Create a Python Application which asks the user for their zip code or city.
• Use the zip code or city name in order to obtain weather forecast data from: http://openweathermap.org/
• Display the weather forecast in a readable format to the user.
• Use comments within the application where appropriate in order to document what the program is doing.
• Use functions including a main function.
• Allow the user to run the program multiple times.
• Validate whether the user entered valid data. If valid data isn’t presented notify the user.
• Use the Requests library in order to request data from the webservice.
• Use Python 3.
• Use try blocks when establishing connections to the webservice. You must print a message to the user indicating whether or not the connection was successful.

*** also formatted into imperial units. Site defaults into Kelvin. ***

1. What is the fundamental equation that guides changes to a weight w_ij in a BP network.   Describe its components.

2. Multi-layer BP neural networks have no proof of converging to an optimal solution. Is this true? If it is, then why do we bother to use them?

Safaricom service provider has assigned you a task in their software section to design an application that can be used by wholesalers to buy their products. Your duty is to implement the data structure which can be used to store the inventory of the warehouse containing the products. The data structure should be able to add a product with an associated code indicating its likelihood to spoil, remove a product that is most likely to spoil, and return the overall number of products in the inventory.

i.          Describe the data structure you would use and give reasons.

ii.         With reference to algorithms, explain the terms time efficiency and space efficiency.

iii.        Describe a non-linear data structure. Give examples and operations in which you might perform on such a structure.