JavaScript

each item must have at least three categorical attributes and at least one numeric attribute.

Write a function that counts the number of values each item attribute has. This is effectively a group-by on the item table for each column. For example: if the first attribute is colour, and its values are [ ‘red’, ‘black’, ‘white’, ‘black’, ‘red’ ],

the counts for colour would be: red 2 black 2 white 1

C# Questions:

55.A class must be ___________________ before objects of that class can be created.

a.added to the Form

b.declared as Private

c.contain properties

d.added to the application’s project

60.If the variable type of the element in a foreach statement cannot be converted to the same variable type as the collection’s objects, ______________.

a.the body of the statement is ignored

b.a syntax error occurs

c.a runtime error occurs

d.a logic error occurs

66.C# views each file as a _____________.   

a.sequential stream of bytes

b.sequential stream of bits

c.sequential stream of characters

d.sequential stream of strings

67.____________ is the part of Microsoft’s .NET platform used for interacting with databases.   

a.MDB.NET

b.Database.NET

c.Access.NET

d.ADO.NET

e.SQL.NET

68.A(n) ____________ enables you to access and store data without worrying about how the data is organized.

a.MIS

b.Database Management System

c.primary key

69.A ___________ maintains a connection to a database.

a.connection object

b.data reader

c.StreamReader

d.StreamWriter

71.Use a data reader object’s ___________ method to read information from a database.

a.Open

b.ReadData

c.GetRecord

d.Read

e.ReadTable

72.A(n) ___________ is the interface used by a program to access the operating system and various services on the computer.

a.API

b.GDI+

c.IDE

d.GUI

73.Web applications can be created using a combination of C# and Microsoft’s ____________ technology.

a.HTML.NET

b.WWW.NET

c.ASP.NET

d.PHP.NET

74.The ______________ property specifies the item that is selected in the ListBox.

a.SelectedIndex

b.SelectedItem

c.Items

d.Selection

75._____________ allows an application to track data across multiple Web pages.

a.A Response object

b.Client state

c.An instance variable

d.Session state

76.Exception handling requires that you write code to handle ______________.   

a.all types of errors

b.only errors that could occur in your code

c.a few of the most common errors

d.only those errors you choose to handle

77.To catch exceptions thrown by a section of code, you must first enclose those lines in a ____________ block.

a.try

b.finally

c.throw

d.exception

78.A catch block that does not specify which type of exception it catches ____________.

a.is a syntax error

b.is useless; it will not catch any type of exception

c.will catch any type of exception that does not already have a handler defined

98.

All C# applications begin execution by calling the ________ method.

a.main()

b.init()

c.start()

d.submain()

Interest Expenses must be included in the cash flow statement using indirect method?If yes, in which column?

1. Design a ship class that has the following data fields:
   • A data field for the name of the ship (a string).
   • A data field for the year that the ship was built (a String).
   • A constructor and appropriate accessors and mutators.
   • A toString method that displays the ship’s name and the year it was built.
2. Design a CruiseShip class that extends the Ship class. The CruiseShip class should have the following member:
   • A field for the maximum number of passengers (an int).
   • A constructor and appropriate accessors and mutators.
   • A toString method that overrides the toString method in the base class. The CruiseShip class's toString method should display only the ships name and the maximum number of passengers.
3. Design a CargoShip class that extends the Ship class. The CargoShip class should have the following members:
   • A field for the cargo capacity in tonnage (an int).
   • A constructor and appropriate accessors and mutators.
   • A toString method that overrides the toString method in the base class. The CargoShip class's toString method should display only the ships name and ship’s cargo capacity.
4. Demonstrate the classes in a program that has a Ship array.  Assign various Ship, CruiseShip, and CargoShip objects to the array elements. The program should then step through the array, calling each objects toString method.

When a psychologist accepts a referral to do a forensic evaluation, who is the “client?” Discuss how and why this is a complicated question

The Coca Cola Company

1. Summarizes the competitive environment in the industry and describes one or two strategies used by other firms.
2. Identifies which of Porter’s generic strategies is being pursued the Coca-Cola Company
3. Justifies your strategy choice in item #2 above, with specific examples.
4. Explains the advantages and disadvantages of the generic strategy.

Choose true or false for each statement regarding concave mirrors.
true false  A concave mirror produces an enlarged real image when the object is placed far beyond its focal point (Region 1).
true false  If an object is placed 4.1 cm from a concave mirror with f = 4 cm, then its image will be reduced and virtual.
true false  If an object is placed 7.9 cm from a concave mirror with f = 4 cm, then its image will be enlarged and real.

Choose true or false for each statement regarding convex mirrors.
true false  A convex mirror produces a reduced real image when the object is placed between the mirror and its focal point (Region 3).
true false  If an object is placed 7.9 cm from a convex mirror with f = 4 cm, then its image will be reduced and real.
true false  If an object is placed 3.9 cm from a convex mirror with f = 4 cm, then its image will be reduced and real.

Choose true or false for each statement regarding the sign conventions for mirrors.
true false  The focal length f is positive for convex mirrors.
true false  Virtual images appear behind a mirror and have a positive value for the image distance.
true false  The magnification m is negative for upright images.

Look for the binary representation for each of the numbers in the left column of the following table using the algorithm that iteratively divides by two. Show all steps of the algorithm for each number in different rows of a table with three columns like the example I have included. All steps are essential for getting full credit. Create 5 different tables for the 5 numbers. The numbers in the left column of the following table are expressed in base-10 system.

Example: The number to be represented in binary notation

is 142.

Answer: 10001110 (same as the binary string formed by putting

the bits in the third column of the table)

(verification of correctness: (2⁰ * 0 + 2¹ * 1 + 2² * 1 + 2³ * 1 + 2⁴ * 0 + 2⁵ * 0 + 2⁶ * 0 + 2⁷ * 1) = (2 + 4 + 8 + 128) = 142)

Overview

A cyber-security company called UltraHackz is interested in finding talented computer science students. To do so, they post a challenge you find very interesting. They upload a txt file that contains 100 records containing information about 100 system accounts. Each record has a username, a salt value, and a hashed password.

Each record is stored as follows:

<username>,<salt value>,<hashed password>

That is, there is one line per record in the file, where the three values are separated by commas. Your job is to find the real password associated with each of the accounts. They tell you that all passwords contain only numbers (0-9), and that each password is at least 3 characters long, and at most 7 characters long. Your task is to implement a recursive method to generate all possible passwords (brute force). To make it interesting, UltraHackz posted the following rules:

Every time you generate a string s, you need to check if s is the password of any of the usernames in the file. To do so, concatenate s with a user’s salt value, and apply the hashlib.sha256 method to the resulting string. If the output generated by sha256 matches the hashed string for that account, string s is the real account’s password! You accept UltraHackz challenge as you think this is a perfect opportunity to show off your recursion skills!

• The method MUST be recursive
• Numbers 3 and 7 are not be hard-coded inside the method that generates the passwords; they should be parameters of the method
• You can have at most two nested loops inside this method (less than two is perfectly fine as well).

GIVEN CODE

import hashlib

def hash_with_sha256(str):
    hash_object = hashlib.sha256(str.encode('utf-8'))
    hex_dig = hash_object.hexdigest()
    return hex_dig

def main():
    hex_dig = hash_with_sha256('This is how you hash a string with sha256')
    print(hex_dig)

main()

PASSWORD TXT FILE

User0,jjbgis,e0ed8f4991bfbfd73fe604e7d29f77c39185aebe9fab828d4183941de71cf066
User1,sxhizl,4c176c0cad87bd15d5ff2d7b51ca3333fe2b75486523fc4eb00f8838fad7a73c
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User6,djrtxx,8ded6bbf64d75fe508ed0ebfb98fa04076fedb2b9a1b8a6dd8626b5849e64bdc
User7,xnyakp,16243385d71d6499aff8746f9b0859d9bb90231b79a950274f8d8c00de3e64e5
User8,abphyg,e88381b6e7ab945601d5c6ca14bac1171cce68efd37e0eaaa934ed8754f77a65
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User13,ubonjg,35ecf29e26d9385f6fb1761b2d893b1449d5b69d5b8904f680f92000a3aae74a
User14,dnuvqv,dd31c212068f2e460694dcc5805f2a7fedca5c5e0dff892b5371de37ee201b4b
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User20,fwkbbl,01670b4d7fa70a63ff31e88c9f8f178ef216d425a6bf8cc03de0994620b67c55
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The expected pretax return on three stocks is divided between dividends and capital gains in the following way: Stock Expected Dividend Expected Capital Gain A $0 $10 B 5 5 C 10 0 a. If each stock is priced at $200, what are the expected net percentage returns on each stock to (i) a pension fund that does not pay taxes, (ii) a corporation paying tax at 35% (the effective tax rate on dividends received by corporations is 10.5%), and (iii) an individual with an effective tax rate of 15% on dividends and 10% on capital gains? (Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places.) b. Suppose that investors pay 50% tax on dividends and 20% tax on capital gains. If stocks are priced to yield an after-tax return of 8%, what would A, B, and C each sell for? Assume the expected dividend is a level perpetuity. (Do not round intermediate calculations. Round your answers to 2 decimal places.)

Explain how FTIR-ATR is capable of measuring the absorbance of IR radiation without projecting the radiation directly through a sample container to a detector on the other side.

What does Advertising's future look like?

• Will it increase or decrease in the future?
• Will human advertisers (account managers, creative specialists, etc.) be as important in the future of advertising?
  • Do computers or analytics advertise better than humans?

The Outdoor Furniture Corporation manufactures two​ products, benches and picnic​ tables, for use in yards and parks. The firm has two main​ resources: its carpenters​ (labor force) and a supply of redwood for use in the furniture. During the next production​ cycle, 1 comma 400 hours of labor are available under a union agreement. The firm also has a stock of 5 comma 200 board feet of quality redwood. Each bench that Outdoor Furniture produces requires 5 ​labor-hours and 13 board feet of​ redwood; each picnic table takes 6 ​labor-hours and 26 board feet of redwood. Completed benches will yield a profit of ​$12 ​each, and tables will result in a profit of ​$18 each. How many benches and tables should Outdoor Furniture produce in order to obtain the largest possible​ profit?

Number of benches produced equals_______​(round your response to the nearest whole​ number).
Number of tables produced equals______​(round your response to the nearest whole​ number).
Optimal solution value​ = ​$_______(round your response to the nearest whole​ dollar).

Makai Metals Corporation has 10 million shares of common stock outstanding and 440,000 4 percent semiannual bonds outstanding, par value $1,000 each. The common stock currently sells for $48 per share and has a beta of 1.5, and the bonds have 10 years to maturity and sell for 115 percent of par. The market risk premium is 8.8 percent, T-bills are yielding 5 percent, and the company’s tax rate is 40 percent.

a. What is the firm's market value capital structure? (Do not round intermediate calculations and round your answers to 4 decimal places, e.g., 32.1616.)

b. If the company is evaluating a new investment project that has the same risk as the firm's typical project, what rate should the firm use to discount the project's cash flows? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)

Discount rate              %