1. Using Python list tools, create the standard stack (push, pop) and queue (enqueue, dequeue) operations
2. Counting Letter Challenge: Create a function that...
   1. Takes in a string as parameter
   2. Counts how often each letter appears in the string
   3. Returns a dictionary with the counts
   4. BONUS: make it so lowercase and uppercase letter count for the same letter

#include <iostream>

#include <iomanip>

using namespace std;

int main()

{

            float miles;   //miles traveled

            float hours;   //time in hours

            float milesPerHour; //calculated miles per hour

            cout << "Please input the Miles traveled" << endl;

            cin >> miles;

            cout << "Please input the hours traveled" << endl;

            cin >> hours;

            milesHours = miles / hours;

cout << fixed << showpoint << setprecision(2);

            cout << "Your speed is " << milesPerHour << " miles per hour" << endl;

            return 0;

}

1. Rewrite the above program such that function main call a return type function named findMilesPerHours to calculate the number of miles per hours. Finish function prototype, call and function definition.#include <iostream>

#include <iomanip>

// Function prototype here

……………………………………………………………………..

using namespace std;

int main()

{

            float miles;   //miles traveled

            float hours;   //time in hours

            float milesPerHour; //calculated miles per hour

            cout << "Please input the Miles traveled" << endl;

            cin >> miles;

            cout << "Please input the hours traveled" << endl;

            cin >> hours;

            // Function call here

……………………………………………………………………..

cout << fixed << showpoint << setprecision(2);

            cout << "Your speed is " << milesPerHour << " miles per hour" << endl;

            return 0;

}

// Function definition here

……………………………………………………………………..

1. Rewrite the above program such that function main will call the void function named findMilesPerHours to calculate the number of miles per hours. Finish function prototype, call and function definition.

#include <iostream>

#include <iomanip>

using namespace std;

// Function prototype here

……………………………………………………………………..

int main()

{

       float miles;   //miles traveled

            float hours;   //time in hours

            float milesPerHour; //calculated miles per hour

            cout << "Please input the Miles traveled" << endl;

            cin >> miles;

            cout << "Please input the hours traveled" << endl;

            cin >> hours;

            // Function call here

……………………………………………………………………..

cout << fixed << showpoint << setprecision(2);

              cout << "Your speed is " << milesPerHour << " miles per hour" << endl;

            return 0;

}

// Function definition here

……………………………………………………………………..

Amdahl's law: Suppose you ran an application on a single processor in 1.5 hours. Upon careful examination of the code, you found out that the application is in fact 90% parallelizable.
a) If you can run this application on a computer with 10 processors, what would be the execution time?
b) If you can run this application on a computer with an unlimited number of processors, what would be the execution time?

I was given an assignment to write three sections of Code.

1. Look up password

2. Decrypt a password.

3. What website is this password for?

Here's the base code:

import csv
import sys

#The password list - We start with it populated for testing purposes
passwords = [["yahoo","XqffoZeo"],["google","CoIushujSetu"]]


#The password file name to store the passwords to
passwordFileName = "samplePasswordFile"

#The encryption key for the caesar cypher
encryptionKey=16

#Caesar Cypher Encryption
def passwordEncrypt (unencryptedMessage, key):

    #We will start with an empty string as our encryptedMessage
    encryptedMessage = ''

    #For each symbol in the unencryptedMessage we will add an encrypted symbol into the encryptedMessage
    for symbol in unencryptedMessage:
        if symbol.isalpha():
            num = ord(symbol)
            num += key

            if symbol.isupper():
                if num > ord('Z'):
                    num -= 26
                elif num < ord('A'):
                    num += 26
            elif symbol.islower():
                if num > ord('z'):
                    num -= 26
                elif num < ord('a'):
                    num += 26

            encryptedMessage += chr(num)
        else:
            encryptedMessage += symbol

    return encryptedMessage

def loadPasswordFile(fileName):

    with open(fileName, newline='') as csvfile:
        passwordreader = csv.reader(csvfile)
        passwordList = list(passwordreader)

    return passwordList

def savePasswordFile(passwordList, fileName):

    with open(fileName, 'w+', newline='') as csvfile:
        passwordwriter = csv.writer(csvfile)
        passwordwriter.writerows(passwordList)



while True:
    print("What would you like to do:")
    print(" 1. Open password file")
    print(" 2. Lookup a password")
    print(" 3. Add a password")
    print(" 4. Save password file")
    print(" 5. Print the encrypted password list (for testing)")
    print(" 6. Quit program")
    print("Please enter a number (1-4)")
    choice = input()

    if(choice == '1'): #Load the password list from a file
        passwords = loadPasswordFile(passwordFileName)

    if(choice == '2'): #Lookup at password
        print("Which website do you want to lookup the password for?")
        for keyvalue in passwords:
            print(keyvalue[0])
        passwordToLookup = input()

        ####### YOUR CODE HERE ######
        #You will need to find the password that matches the website
        #You will then need to decrypt the password

        #
        #1. Create a loop that goes through each item in the password list
        #  You can consult the reading on lists in Week 5 for ways to loop through a list
        #
        #2. Check if the name is found.  To index a list of lists you use 2 square backet sets
        #   So passwords[0][1] would mean for the first item in the list get it's 2nd item (remember, lists start at 0)
        #   So this would be 'XqffoZeo' in the password list given what is predefined at the top of the page.
        #   If you created a loop using the syntax described in step 1, then i is your 'iterator' in the list so you
        #   will want to use i in your first set of brackets.
        #
        #3. If the name is found then decrypt it.  Decrypting is that exact reverse operation from encrypting.  Take a look at the
        # caesar cypher lecture as a reference.  You do not need to write your own decryption function, you can reuse passwordEncrypt
        #
        #  Write the above one step at a time.  By this I mean, write step 1...  but in your loop print out every item in the list
        #  for testing purposes.  Then write step 2, and print out the password but not decrypted.  Then write step 3.  This way
        #  you can test easily along the way.
        #


        ####### YOUR CODE HERE ######


    if(choice == '3'):
        print("What website is this password for?")
        website = input()
        print("What is the password?")
        unencryptedPassword = input()

        ####### YOUR CODE HERE ######
        #You will need to encrypt the password and store it in the list of passwords

        #The encryption function is already written for you
        #Step 1: You can say encryptedPassword = passwordEncrypt(unencryptedPassword,encryptionKey)]
        #the encryptionKey variable is defined already as 16, don't change this
        #Step 2: create a list of size 2, first item the website name and the second item the password.
        #Step 3: append the list from Step 2 to the password list


        ####### YOUR CODE HERE ######

    if(choice == '4'): #Save the passwords to a file
            savePasswordFile(passwords,passwordFileName)


    if(choice == '5'): #print out the password list
        for keyvalue in passwords:
            print(', '.join(keyvalue))

    if(choice == '6'):  #quit our program
        sys.exit()

    print()
    print()

USE R TO WRITE THE CODES!

# 2. More Coin Tosses
Experiment: A coin toss has outcomes {H, T}, with P(H) = .6.
We do independent tosses of the coin until we get a head.

Recall that we computed the sample space for this experiment in class, it has infinite number of outcomes.

Define a random variable "tosses_till_heads" that counts the number of tosses until we get a heads.
```{r}

```

Use the replicate function, to run 100000 simulations of this random variable.
```{r}

```
Use these simulations to estimate the probability of getting a head after 15 tosses. Compare this with the theoretical value computed in the lectures.
```{r}

```
Compute the probability of getting a head after 50 tosses. What do you notice?
```{r}

Write a C ++ program that asks the user for the speed of a vehicle (in miles per hour) and how many hours it has traveled. The program should then use a loop to display the distance the vehicle has traveled for each hour of that time period. Here is an example of the output:

What is the speed of the vehicle in mph? 40
How many hours has it traveled? 3
Hour Distance Traveled
--------------------------------
1           40
2           80
3          120

Input Validation: Do not accept a negative number for speed and do not accept any value less than 1 for time traveled.

Distance Traveled

The distance a vehicle travels can be calculated as follows:

   distance = speed * time

For example, if a train travels 40 miles per hour for 3 hours, the distance traveled is 120 miles.

1. The functional dependencies for the ProAudio relation:

c_id -> f_name, l_name, address, city, state, zip

item_id -> title, price

ord_no -> c_id, order_date

ord_no  + item_id  -> shipped

zip -> city, state

Original ProAudio relation:

determining functional dependencies for ProAudio database

Normalization is a set of rules that ensures the proper design of a database. In theory, the higher the normal form, the stronger the design of the database.

Use the file for Functional Dependencies Above to answer the following questions:

Now that you are familiar with the mission statement and the entities and attributes the for ProAudio:

1. What are types of anomalies can occur when normalization has not taken place?
2. Define Anomalies- definitions in your own words
   • Anomalie 1
   • Anomalie 2
   • Anomalie 3

After reading the Biography in Context database entries on Bill Gates and Steve Jobs, briefly compare and contrast these two leaders of industry. Considering that while both are quite different, observe some unifying qualities.

How would you write the following recursively? This is in Java.

public static String allTrim(String str) {
int j = 0;
int count = 0; // Number of extra spaces
int lspaces = 0;// Number of left spaces
char ch[] = str.toCharArray();
int len = str.length();
StringBuffer bchar = new StringBuffer();
if (ch[0] == ' ') {
while (ch[j] == ' ') {
lspaces++;
j++;
}
}

for (int i = lspaces; i < len; i++) {
if (ch[i] != ' ') {
if (count > 1 || count == 1) {
bchar.append(' ');
count = 0;
}
bchar.append(ch[i]);
} else if (ch[i] == ' ') {
count++;
}
}
return bchar.toString();
}

Any ideas?

You work in the IT group of a department store and the latest analytics shows there is a bug that
allows customers to go over their credit limit. The company's president has asked you to develop a
new algorithm to solve this problem.
Create your algorithm using pseudocode that determines if a department store customer has
exceeded their credit limit. Be sure you gather the following inputs from the user:
• Account number
• Balance of the account
• Total cost of all the products the customer is looking to purchase
• Allowed credit limit
After you gather the inputs, make sure your algorithm calculates if the user can purchase the
products and provides a message to the user indicating if the purchase is approved or declined.

Write a single, complete If-else-if segment of code based on a variable called ‘Average’ which will process the following task:

1. Display "You made the Dean's List if Average > 95.

Variable=average;

If (average >=95);

{

messagebox.show(“you made the deans list”);

}
             (B) Display "You made the Optimate Society” if Average >= 90

Else if (average>=90);

}

Messagebox.show(“you made the Optimate Society”);

}
             (C) Otherwise Display "You need a 90 to make an honors list"

Else if (average <=89);

{

Messagebox.show(“you need a 90 to make an honors list”);

Write a program that prompts for the lengths of the sides of a triangle and reports the three angles. Make sure you have a good introduction stating what the program does when it is run, and a helpful prompt for the user when asking for input:

i.e. Here is the generated output from a sample program:

This program computes the angles of a triangle given the lengths of the sides.

What is the length of side 1? <wait for user input>

What is the length of side 2? <wait for user input>

What is the length of side 3? <wait for user input>

angle 1 = <angle in degrees for side 1, side 2, and side 3>

angle 2 = <angle in degrees for side 2, side 3, and side 1>

angle 3 = <angle in degrees for side 3, side 1, and side 2>

Requirements

• Your program must have at least 1 function with parameters, that when called with arguements returns a value.

Hints

• Make sure to store your input in a variable.
• Convert your input from a string to a float.
• You will need to import the math library
• You can use a variant of the law of cosines to compute the angles:
  • angle = arccos( (a^2 + b^2 - c^2) / (2ab) )
• The math.acos() and math.degrees() methods will be useful.
• Write a function for computing the angle that takes three parameters, a, b, and c
• You only need one function for computing all three angles.

Save your program as triangle_angles.py and attach it.

Which of the following statement will, move the file pointer to the third ‘r’ in the file show below. Assume the newline character is 1 byte. Select all that apply.

                With

                great

                power

                comes

                great

                responsibility

Answers:

                Spidey.seekg(-19L, ios:end);

                Spidey.seekg(‘r’, ios:beg);

                Spidey.seekg(24, ios:cur);

                Spidey.seekg(“r?r?r”, ios:beg);

Describe PowerShell and give examples of the syntax.

You are expected to design a circuit with (3bit)counter and skip next signal with other necessary control signals to complete your labwork.
You have to include your gdf file and simulation file(scf).  
Zip/Rar your project files.