Question 1  Marks 05

Assume s is a string of numbers.

Write a program that checks the string s for the values ‘2‘, ‘3‘, ‘5‘ and ‘7‘. When one of the values is found in the string, record its position within the string and continue to check for more occurrences. Finally, output the results found.
For example, if s = '568714523645873', your program should print:

2 – 7

3 – 8 14

5 – 0 6 11

7 – 3 13

Give Five (5) different examples with its output.

Question 2  Marks 05

Assume s is a string of numbers.

Write a program that prints the longest substring of s in which the numbers occur in descending order. For example, if s = '561984235870154755310', then your program should print

Longest substring in numeric descending order is: 755310

In the case of ties, print the first substring. For example, if s = '742951', then your program should print

Longest substring in numeric descending order is: 742

Question 3 Mark 05  

You have recently returned to Australia after a holiday abroad. You have some unspent foreign currency that you need to convert back into AUD (Australian Dollars). Write a program that will allow you to enter two or more amounts of foreign currency and their associated exchange rate.  Convert the amounts back into AUD and print the total sum of AUD received once all conversions are complete. 

Resulting program output might look similar to:

Enter currency amount:  100

Enter exchange rate:  0.75

100.0000 / 0.7500 = 133.33

Enter currency amount:  100

Enter exchange rate:  0.50

100.0000 / 0.5000 = 200.00

Total AUD received = $333.33

Question 4 Mark 05

Write a python program that allows the user to navigate the lines of text in a file. The program should prompt the user for a filename and input the lines of text into a list. The program then enters a loop in which it prints the number of lines in the file and prompts the user for a line number. Actual line numbers range from 1 to the number of lines in the file. If the input is 0, the program quits. Otherwise, the program prints the line associated with that number.

Question 5  Mark 10

Write a program that encrypts and decrypts the user input. Note – Your input should be only lowercase characters with no spaces.

Your program should have a secret word that will be used for encryption/decryption. Each character of the user’s input should be offset by the value of the same character in your secret word. For example, if my secret word is “cab” and the user wants to encrypt “apples”.

  

c

a

b

c

a

b

 

3

1

2

3

1

2

 

 

a

p

p

l

e

s

 

1

16

16

12

5

19

 

 

4

17

18

15

6

21

 

d

q

r

o

f

u

The encrypted output would be “dqrofu”.

The program should ask the user for input to encrypt, and then display the resulting encrypted output. Next your program should ask the user for input to decrypt, and then display the resulting decrypted output.

Enter phrase to Encrypt (lowercase, no spaces):  apples

Result: dqrofu

Enter phrase to Decrypt (lowercase, no spaces):  dqrofu

Result: apples

Question 6 Mark 10

Write a python program that accepts a text file as input. The program should read the text file and display all unique words in alphabetical order. It should then display the non-unique words and the number of times that they occurred in the input text.

Input file contains the following text:

how much wood would a woodchuck chuck if a woodchuck could chuck wood

Expected outcome should resemble:

Non-unique words and number of occurrences in no particular order:

         wood  :  2

         a  :  2

         woodchuck  :  2

         chuck  :  2

Unique words in alphabetic order:

         could

         how

         if

         much

         would

!End! 

Hawwa Hafesje: Computing Project

Course Name/Subject – Computing

Login or Hard Copy – Hard Copy

Detailed Description – To build and test an online system that works on both a computer and mobile phone, which tracks talks and events.

Requirements have been written, and a start has been made on the initial requirements. These need to be built on and the rest of the requirements need to be completed.

Coding is done in PHP and javascript.

 

Study the required readings in this module and answer the following questions:

1. Explain what an operating system is, its functions, and its components 
2. Describe at least 3 different types of OS and their primary functions. 
3. Explain operating system architecture and its components.

Assignment Expectations

Using information from the modular background readings and any good  quality resource you can find, write a 3-page (excluding the title page  and reference pages), single-spaced report to address the questions in  this assignment. 

The following items will be assessed in particular:

1. Your ability to address all questions based on reading materials and your own research.
2. Your ability to write a report clearly and succinctly.
3. Effective and appropriate use of in-text citations to the assigned readings and other source material to support your arguments.

*******Required Readings******

Components of a computer system

• Jaffarzadeh, A. (2014, January 16). Computer hardware & software lesson part 1 [Video]. Retrieved from https://www.youtube.com/watch?v=8UyJMiYqvs4
• Jaffarzadeh, A. (2014, January 16). Computer hardware & software lesson part 2 [Video]. Retrieved from https://www.youtube.com/watch?v=gaN1SKti3ts

Operating systems, their goals, classification, and architecture

• Garg, R., & Verma, G. (2017). Chapter 1: Operating systems: Overview. In Operating systems: An introduction. Available in the Trident Online Library.
  Note: This chapter discusses the goals and classifications of operating systems
• Garg, R. & Verma, G. (2017). Chapter 2: Operating systems architecture. In Operating systems: An introduction.
  Note: This chapter explains the architecture of OS.
• Stone, S. M. (2013, May 24). Operating Systems 1 – Introduction [Video]. Retrieved from https://www.youtube.com/watch?v=5AjReRMoG3Y
  Mobile Operating systems
• Data Is Beautiful (2019, October 9). (UPDATED!) Most popular mobile OS 1999-2019 [Video]. Retrieved from https://www.youtube.com/watch?v=MMyMB4zm9so
• WawamuStats (2019, October 4). Most used mobile phone operating system (OS) (2009-2019) [Video]. Retrieved from https://www.youtube.com/watch?v=etrE_NcjXX8

 

Do a bit of research on-line. Find a criminal case that involved Digital Forensics. 

Using WORD, write an ORIGINAL brief essay of 300 words or more describing the case and the how digital forensics were used  in the investigation. 

Safe Assign is software that verifies the originality of your work against on-line sources and other students.

Note your Safe Assign score. Continue submitting until your Safe Assign score is less than 25. 

Attach your WORD doc and then hit SUBMT.

 

• OverviewThis week the class reviews networks and the internet. 
  This week’s topics:
  
  • Review the anatomy of an investigation
  • Understand the scope of investigations
  • Identify stakeholders
  • Learn the art of documentation.
  • Review the weekly reading and viewing assignments
  • Review this week’s lab assignment
• Required ReadingsRead Chapter 1 of the Graves text, The Anatomy of a Digital Investigation.
  Primary topics:
  
  • Model for investigators
  • Identifying stakeholders
  • Documenation

  DUE 10/17    9 P.M EST   BE ON TIME

To prepare for this Discussion:

• Review this week’s Learning      Resources and media program related to regression and correlation.
• Review Magnusson’s web blog to  further your visualization and understanding of correlations between two  variables.
• Construct a research question      using the General Social Survey dataset (ATTACHED), which can be answered      by a Pearson correlation and bivariate regression.

Use SPSS to answer the research question. Post your response to the following:

INCLUDE TABLES

1. What is your research question?
2. What is the null hypothesis for      your question?
3. What research design would      align with this question?
4. What dependent variable was      used and how is it measured?
5. What independent variable is      used and how is it measured?
6. If you found significance, what      is the strength of the effect?
7. Explain your results for a lay      audience; explain the answer to your research question.