Assignment Instructions

Instructions: Answer all questions. Make sure you show your work on #1. Answer #4 in the table format provided. Submit your assignment through Blackboard – Assignments.. HW 01 Computer Foundations

 

 

Purpose: The purpose of this assignment is to solidify your understanding of topics covered in chapter 2.  Such understanding is gained through practice.

 

Instructions: Answer all questions.  Make sure you show your work on #1.  Answer #4 in the table format provided.  Submit your assignment through Blackboard – Assignments.

 

  1. Manually perform the following numbering system conversions.  Convert each number using the approach shown in the Carrier textbook, Figures 2.2-2.3.  This will require a TWO-STEP conversion in some cases.  Do NOT use the binary, decimal, hex conversion table in Table 2.1.  Show your work (equation and/or table as shown in Figures 2.2 and 2.3).  You can certainly check your work using a calculator, but to receive credit, you must show your manual calculation work.  NOTE: Endian ordering is not relevant here.  Presume the multi-byte data structure in 1d has already been ‘flipped’ as needed.
    1. Convert 10011011 to a hexadecimal number.
    2. Convert 01010101 to a hexadecimal number.
    3. Convert x4B to a decimal number.
    4. Convert xCDEF to a decimal number.
    5. Convert x0E to a binary number.
    6. Convert xFF to a binary number.
  2. Briefly explain why the maximum number you can represent with a given number of binary bits differs from the “maximum count.”  Use an example to support your explanation.
  3. Answer 3a-3f based on the following hex dump, which is the start of a master boot record (MBR) (known as the $Boot file in an NTFS volume).  You will need to use Table 13.18 in your textbook.
  1. What is the OEM name for this volume?
  2. How many bytes per sector, as established during low-level formatting, in this system? Give your answer in DECIMAL AND HEXADECIMAL. This is a little-endian, WORD length data structure.
  3. How many sectors per cluster, as established during high-level formatting, in this system? Give your answer in DECIMAL AND HEXADECIMAL.
  4. Does endian ordering matter in item 3c above? Why, or why not?
  5. What is the “Total sectors in file system” number? Give your answer in DECIMAL AND HEXADECIMAL. This is a little-endian, QWORD length data structure beginning at offset 40.

 

For item 4 below, do the following:

  • Download, unzip and run the DCode utility that converts hex strings to logical date/time stamps considering the appropriate epoch, endian ordering, etc. You should be able to download it here: http://www.digital-detective.co.uk/freetools/decode.asp
  • All you have to do to use it is enter the data string in hex in the ‘value to decode’ box, indicate the appropriate ‘decode format,’ and click decode.
  • Selecting a ‘little endian’ decode format will cause the DCode utility to automatically ‘flip’ the bytes in the time stamp data structure for you upon converting the time stamp.
  1. Endian Ordering & Date/Time Stamps: The figure below contains part of an NTFS MFT entry for a file.  Four 64-bit (QWORD) Windows date/time stamps are located at absolute offsets 344134736-344134767.  The first 64‑bit time stamp is the file creation date/time.  The second 64-bit time stamp is the file last written date/time.  The third 64-bit time stamp is the last modified time stamp for that file’s MFT entry (has nothing to do with the file’s content).  The fourth 64-bit time stamp is the file last accessed time stamp.  Given this, given what you now know about endian ordering and numbering systems, and with the assistance of the DCode utility, reproduce and complete the table following the figure.

 

 Created Date/TimeLast Written Date/TimeLast Accessed Date/Time
Decimal offset location (starting offset address) 

 

  
Hex string as stored on-disk (what you see in the hex editor) 

 

  
Hex number (Number of 100 nanoseconds increments since Windows Epoch)   
Decimal number (Number of 100 nanoseconds increments since Windows Epoch)   
Date/Time with DCode format being “Windows: 64 bit Hex Value–Little Endian”   
Date/Time with DCode format being “Windows: 64 bit Hex Value – Big Endian,”   

 

Instructions: Answer all questions. Make sure you show your work on #1. Answer #4 in the table format provided. Submit your assignment through Blackboard – Assignments.

Calculate Price


Price (USD)
$

Why Choose Us For Your Assignment?

Privacy

We value all our customers' privacy. For that reason, all information stays private and confidential and will never be shared with third parties.

Punctuality

With our service you will never miss a deadline. We use strict follow-ups with our writers to ensure that all papers are submitted on time.

Authenticity

We have no tolerance for plagiarism. All papers go through thorough checking to ensure that no assignments contain plagiarism.

Money Back

You feel unsatisfied with your results? No worries. We offer refunds to our customers if any paper is not written according to the instructions.

Clients Love Us

Client #121678
Client #121678
Read More
This is by far the best I have ever scored in a custom essay. I am surprised the writer handled this assignment so well despite the short notice. I will definitely use your service next time.
Client #21702
Client #21702
Read More
When I was recommended to you by my friends, I wasn't sure you could deliver excellent results for Masters research papers until I submitted my first order. I am all yours now.
Client #20730
Client #20730
Read More
Excellent Services! You are the only assignment helper I can rely on. I have worked with many before and your services are exceptional. I have recommended you to my friends and the results are similar.
Client #20387
Client #20387
Read More
I rarely write reviews online but your services are worth promoting. My paper was so urgent I was sure I was gonna miss the deadline but you turned things around. You are awesome!
Client #20189
Client #20189
Read More
I am a satisfied customer. I know I should have given a 5 star because you deserve it but I will give 4.6 because I almost missed a deadline because of a revision. Luckily it was minor and the writer acted promptly.
Client #20187
Client #20187
Read More
Great paper but there is still some room for improvement. I am impressed by your fast responses and how you tacked my concerns professionally. Thank you for being among the few genuine essay writing service providers.
Client #19783
Client #19783
Read More
I can't thank you enough for being a great part of my college life. I recommended you to two more of my friends. I am sure they will be making their orders soon. I love the fact that you offer free pages for referrals. I will be referring a few more and maybe I won't have to pay for my next two paper, LOL.
Previous
Next