You are now the manager of a small team of software engineers. Some of them are fresh graduates, while some of them have a few years of working experience in the field. You are tasked with producing a small experimental FinTech (Financial Technology) mobile application. You will need to publish on both Android and iPhone platforms. You are adopting an Agile methodology, with emphasis on Test-Driven Development and extensive automated tests. The concept behind the application is very innovative, so design is constantly changing.

Your team consultant, William, believes the team should spend less time on planning and more time on producing first prototypes, and then revise our design based on further feedback. Do you agree with his approach? If yes, which practice in Agile methodology is in agreement with this approach?

write a program using Java language that is-

1. Implement Stack with a linked list, and demonstrate that it can solve the Tower of Hanoi problem.

2. Write implementation body of method “infixToPrefix(String[] e)” of class ArithmeticExpression to convert infix expressions into prefix expressions.

Consider the language L over alphabets (a, b) that produces strings of the form aa* (a + b) b*a.
a) Construct a nondeterministic finite automata (NFA) for the language L given above.

b) Construct a deterministic finite automaton (DFA) for the NFA you have constructed above.

Python Programming

I have a skeleton code here for this project but do not know exactly where to start. My task is to implement a reliable File Transfer Protocol (FTP) service over UDP. I need help to write the reliable FTP client and server programs based on an Alternating Bit Protocol (ABP) that will communicate with a specially designated server. In socket-level programming as well...

# program description

# Library imports

from socket import *

import sys

import time

# Variable declarations

server = "harp.ece.vt.edu" # server

tcpPort = 21000 # TCP listening port

buffer = 4096 # defines the size of acceptable data for receipt

message ="debug" # controls condition of transfered data. debug: no delay or corruption

# normal: server introduces delays and errors into transmission

# Initialize variables

# sequence number value 1

# sequence number value 0

# Temporary variable for alternating sequence numbers

# control value transfer in progress

# initial setting is for ACK1 but changes during execution

# calculated by a char by char ordinal sum of the packet

# value is then converted to 4-digit ASCII value via

# sum mod 10000

PAYLOAD = ""

udpPort = 0 # variable to hold udpPort number

completeFile = [] # accumulation of complete file transfer

serverResponse = "" # server response variable

endFile = False # flag for end of transmission

badPacket = False #flag for bad checksum comparison

# Create socket variable

sTCP = socket(AF_INET, SOCK_STREAM) # TCP socket definition

sUDP = socket(AF_INET, SOCK_DGRAM)  # UDP socket definition

# send ACK packet to server

Some further instructions include:

The four fields of the “RFP” protocol are:

● SEQUENCE: This is the sequence number of the packet, and can legally assume either of the two values: “0000” or “0001”.

● CHECKSUM: This is a 4-digit ASCII number that is the byte-by-byte sum, modulo-10000, of all data in the payload including the header SEQUENCE and header CONTROL.

● CONTROL: Used by the server to indicate Transfer in Progress “0000” or All Done “0001”. The client should set this field to “0000”. “0002” is reserved for future use.

● DATA: Used by the server to send part of the data file it is transferring

We will establish a “channel”  here, the server will respond with a unique UDP port for you to use for your file transfer: 1. Open a TCP connection to harp.ece.vt.edu over port 21000 2. Send the word “normal” to the server over this port. 3. The server will respond with a number formed in an ASCII string. This is the UDP port that you shall use in the file transfer session. 4. Close the TCP connection. Once you have been assigned a UDP port, you are ready to start the file transfer after you open the socket.

To initiate the file transfer, the client should send an ACK1 packet (sequence number = “0001”, control = “0000”, a computed checksum, and zero bytes of data). As stated above, the checksum is the character-by-character ordinal sum over the entire packet (excluding the checksum field). For the ACK1 packet, checksum = “0”+”0”+“0”+”1”+“0”+”0”+“0”+”0” = ASCII 48 + 48 + 48 + 49 +48 + 48 + 48 + 48 = 385. The 4-digit modulo-10000 ASCII decimal equivalent of this checksum is “0385.” 1 The server will then start sequentially sending the file data, starting with a packet with Sequence Number 0. Abide by the Alternating Bit Protocol to transfer the contents of the file. When the server has completed the file transfer, it will send a final packet with no data with the control field set to “0001.” You must ACK this packet. Then you can close your UDP session and save the output file.

Since the file will be larger than a single packet, the server will segment the file into chunks that will fit within packets. The client will need to reassemble these and put them in a file called reliable.txt.

Consider that time could be internally represented as 3 integers.

• hour (between 0 - 23)
• minute (between 0 - 59)
• second (between 0 - 59)

MyTime class consists of the following members:

• Default constructor: set the time to 00:00:00
• Constructor taking 3 integers i.e., hour, minute and second respectively. This constructor sets this object's Time based on the given parameters.
• Constructor taking 2 integers i.e., hour and minute respectively. This constructor sets this object's hour and minute based on the given parameters. Second will be 0 by default.
• Constructor taking 1 integer i.e., hour. This constructor sets this object's hour based on the given parameter. Minute and second will be 0 by default.
• Accessors (getter) for each field.
• Mutators (setter) for each field. Make sure that each field is set within its proper ranges.
• to12HourFormat() method
  Returns the string representation of this Time object in 12-hour format.
  For instance, if the time is 13:05:58 in 24-hour format, it returns "01:05:58 PM".
  If the time is "12:05:14", it returns "12:05:14 PM".
  If the time is "00:00:00", it returns "12:00:00 AM".
• toString() method
  Returns the string representation of time in 24-hour format i.e., HH:MM:SS
  For instance, 13:05:58

Complete the MyTime class definition and write a main program to test your class in Java.

Explain how you would secure your company’s internal wireless network to prevent unauthorized access, including how it’s configured and what policies might need to be created and enforced to ensure employee compliance.

Enterprise architecture is often dependent on the vision, mission, goals, and strategies of an organization. Independence Medical Center's current mission and vision statements follow:

• Mission Statement: Independence Medical Center is the premiere choice for customer service excellence, providing health care to the region by combining cutting-edge technology and equipment with evidence-based, patient-focused care.
• Vision Statement: A regional medical center that provides compassionate, patient-centered care to all area residents.

Use the Internet to find descriptions of two organizations' enterprise structures or data governance programs. Compare the two, noting the pros and cons of each.

Post rough drafts of updates to the vision and mission statements for Independence Medical Center, incorporating the concept of enterprise information management based on your research.

Cite at least one reference using APA format in your initial post.

You are about to implement the wireless network security measures and policies you just described above, and your boss sends you to talk with two operations managers. The managers are concerned that new restrictions will inhibit their workers and lower performance, which would create a risk to the company in meeting its minimum production levels. Your task (to answer this question) is to explain to the managers how the wireless security measures and policies relate to risk management for the company and alleviate the managers’ concerns.

The industrialization of the world has been described as a “Faustian bargain.” Another perspective holds that industrialization has freed humanity from the bonds imposed by nature. Based on the readings in this module, as well as on your own experience and other readings, do you agree with one of these positions? If so, why? If not, do you have an alternative perspective?

Briefly describe at least six (6) ways to harden a network, including servers and workstations, and the network configuration (architecture); then explain in detail the first two steps you would take toward achieving a secure network.

Based on a Node class;

Use Java to implement the OrderedList class which represents an ordered singly linked list that cannot contain any duplicates. Note that items in the OrderedList are always kept in descending order. Complete the class with the following methods.

• Default constructor
  Create an empty list i.e., head is null.
• boolean insert(int data)
  Insert the given data into the list at the proper location in the list. If the insertion is successful, the function returns true; otherwise, returns false.
• boolean delete(int data)
  Delete the node that contains the given data from the list. If the deletion is successful, the function returns true; otherwise, returns false.
• int find(int data)
  Search and return the index to the node that contains the data. Note that the index starts from 0. If it is not found, return -1.
• int count()
  Count and return the number of nodes in the list
• String toString()
  Return the string representation of this List where all data in the list are enclosed in square brackets [ ].

Then write the program that accepts a sequence of commands and print out the number of successful insertions, the number of successful deletions, the number of successful searches (through the “find” command), the number of items remaining in the list after executing all commands and the final contents of the list.

There are 3 commands which are “insert”, “delete” and “find”.

Input

Line 1: The number of transactions m on the list, where 1  m 200.

Line 2 to m+1: A string command (“insert”, “delete”, “find”) followed by an integer n (separated by a space).

• • “insert” means insert n into the list
• • “delete” means delete n from the list
• • “find” means find n in the list

Output

Line 1: Display 4 integers (each number is separated by a space) which are:

• • the number of successful insertions,
• • the number of successful deletions,
• • the number of items found (from the command “find”), and
• • the number of items remaining in the list

Line 2: The final contents of the list

Please explain the differences between DHCP and DNS and discuss their purposes. I'm not looking for an easy google search, I need examples and explanations to help understand the concepts

The CASE structure is a selection structure, however not all selection structures may be represented as CASE. Give an example of a selection problem that may be solved using the CASE structure and another selection problem that CANNOT be represented by the CASE structure. Type your response in the space provided (after you have created a thread). Indicate which problem CAN and CANNOT be represented by CASE Provide an explanation why each of your suggested problem fits the appropriate category.

Make a python calculator which deals with arithmetic include plus, minus, divide, and multiply as well as explaining each answer and use if statement using sign operator.