All posts by : chebby

Discuss activities that occur during the problem definition phase of the system development life cycle. 

Describe at least THREE ACTIVITIES that you consider most important and why.

 There are 4 parts for the project. The question may be long to read but it’s not a heavy work because there are many examples and explanations for the each parts.*Part 1.  The first part of this project requires that you implement a class that will be used to simulate a disk drive. The disk drive will have numberofblocks many blocks where each block has blocksize many bytes. The interface for the class Sdisk should include :

Class Sdisk

{

public :



Sdisk(string diskname, int numberofblocks, int blocksize);

int getblock(int blocknumber, string& buffer);

int putblock(int blocknumber, string buffer);

int getnumberofblocks(); // accessor function

int getblocksize(); // accessor function



private :



string diskname;        // file name of software-disk

int numberofblocks;     // number of blocks on disk

int blocksize;          // block size in bytes

};

An explanation of the member functions follows :

• Sdisk(diskname, numberofblocks, blocksize) This constructor incorporates the creation of the disk with the “formatting” of the device. It accepts the integer values numberofblocks, blocksize, a string diskname and creates a Sdisk (software-disk). The Sdisk is a file of characters which we will manipulate as a raw hard disk drive. The function will check if the file diskname exists. If the file exists, it is opened and treated as a Sdisk with numberofblocks many blocks of size blocksize. If the file does not exist, the function will create a file called diskname which contains numberofblocks*blocksize many characters. This file is logically divided up into numberofblocks many blocks where each block has blocksize many characters. The text file will have the following structure :  

                                                            -figure 0 (what I attached below)              

• getblock(blocknumber,buffer) retrieves block blocknumber from the disk and stores the data in the string buffer. It returns an error code of 1 if successful and 0 otherwise.
• putblock(blocknumber,buffer) writes the string buffer to block blocknumber. It returns an error code of 1 if successful and 0 otherwise.

IMPLEMENTATION GUIDELINES : It is essential that your software satisfies the specifications. These will be the only functions (in your system) which physically access the Sdisk. NOTE that you must also write drivers to test and demonstrate your program.*Part 2.  The second part of this project requires that you implement a simple file system. In particular, you are going to write the software which which will handle dynamic file management. This part of the project will require you to implement the class Filesys along with member functions. In the description below, FAT refers to the File Allocation Table and ROOT refers to the Root Directory. The interface for the class should include :

Class Filesys: public Sdisk

{

Public :

Filesys(string diskname, int numberofblocks, int blocksize);

int fsclose();

int fssynch();

int newfile(string file);

int rmfile(string file);

int getfirstblock(string file);

int addblock(string file, string block);

int delblock(string file, int blocknumber);

int readblock(string file, int blocknumber, string& buffer);

int writeblock(string file, int blocknumber, string buffer);

int nextblock(string file, int blocknumber);





Private :



int rootsize;           // maximum number of entries in ROOT

int fatsize;            // number of blocks occupied by FAT

vector filename;   // filenames in ROOT

vector firstblock; // firstblocks in ROOT

vector fat;             // FAT

};

An explanation of the member functions follows :

• Filesys() This constructor reads from the sdisk and either opens the existing file system on the disk or creates one for an empty disk. Recall the sdisk is a file of characters which we will manipulate as a raw hard disk drive. This file is logically divided up into number_of_blocks many blocks where each block has block_size many characters. Information is first read from block 1 to determine if an existing file system is on the disk. If a filesystem exists, it is opened and made available. Otherwise, the file system is created.The module creates a file system on the sdisk by creating an intial FAT and ROOT. A file system on the disk will have the following segments:                                                           -figure 1 (what I attached below)           
• consists of two primary data objects. The directory is a file that consists of information about files and sub-directories. The root directory contains a list of file (and directory) names along with a block number of the first block in the file (or directory). (Of course, other information about the file such as creation date, ownership, permissions, etc. may also be maintained.) ROOT (root directory) for the above example may look something like                                                   -figure 2 (what I attached below)  The FAT is an array of block numbers indexed one entry for every block. Every file in the file system is made up of blocks, and the component blocks are maintained as linked lists within the FAT. FAT[0], the entry for the first block of the FAT, is used as a pointer to the first free (unused) block in the file system. Consider the following FAT for a file system with 16 blocks.  

                                                        -figure 3 (what I attached below)

• In the example above, the FAT has 3 files. The free list of blocks begins at entry 0 and consists of blocks 6, 8, 13, 14, 15. Block 0 on the disk contains the root directory and is used in the FAT for the free list. Block 1 and Block 2 on the disk contains the FAT. File 1 contains blocks 3, 4 and 5; File 2 contains blocks 7 and 9; File 3 contains blocks 10, 11, and 12. Note that a “0” denotes the end-of-file or “last block”. PROBLEM : What should the value of FAT_size be in terms of blocks if a file system is to be created on the disk? Assume that we use a decimal numbering system where every digit requires one byte of information and is in the set [0..9]. Both FAT and ROOT are stored in memory AND on the disk. Any changes made to either structure in memory must also be immediately written to the disk.  
• fssynch This module writes FAT and ROOT to the sdisk. It should be used every time FAT and ROOT are modified.
• fsclose This module writes FAT and ROOT to the sdisk (closing the sdisk).
• newfile(file) This function adds an entry for the string file in ROOT with an initial first block of 0 (empty). It returns error codes of 1 if successful and 0 otherwise (no room or file already exists).
• rmfile(file) This function removes the entry file from ROOT if the file is empty (first block is 0). It returns error codes of 1 if successful and 0 otherwise (not empty or file does not exist).
• getfirstblock(file) This function returns the block number of the first block in file. It returns the error code of 0 if the file does not exist.
• addblock(file,buffer) This function adds a block of data stored in the string buffer to the end of file F and returns the block number. It returns error code 0 if the file does not exist, and returns -1 if there are no available blocks (file system is full!).
• delblock(file,blocknumber) The function removes block numbered blocknumber from file and returns an error code of 1 if successful and 0 otherwise.
• readblock(file,blocknumber,buffer) gets block numbered blocknumber from file and stores the data in the string buffer. It returns an error code of 1 if successful and 0 otherwise.
• writeblock(file,blocknumber,buffer) writes the buffer to the block numbered blocknumber in file. It returns an appropriate error code.
• nextblock(file,blocknumber) returns the number of the block that follows blocknumber in file. It will return 0 if blocknumber is the last block and -1 if some other error has occurred (such as file is not in the root directory, or blocknumber is not a block in file.)IMPLEMENTATION GUIDELINES : It is essential that your software satisfies the specifications. These will be the only functions (in your system) which physically access the sdisk.

*Part 3.   The third part of this project requires that you implement a simple shell that uses your file system. This part of the project will require you to implement the class Shell along with member functions. The interface for the class should include :

class Shell: public Filesys

{

Public :



Shell(string filename, int blocksize, int numberofblocks);

int dir();// lists all files

int add(string file);// add a new file using input from the keyboard

int del(string file);// deletes the file

int type(string file);//lists the contents of file

int copy(string file1, string file2);//copies file1 to file2

};

An explanation of the member functions follows :

• Shell(string filename, int blocksize, int numberofblocks): This will create a shell object using the Filesys on the file filename.
• int dir(): This will list all the files in the root directory.
• int add(string file): add a new file using input from the keyboard
• int del(string file): deletes the file
• int type(string file): lists the contents of file
• int copy(string file1, string file2): copies file1 to file2

IMPLEMENTATION GUIDELINES :See the figure 4  (what I attached below) for the ls function of Filesys.See the figure 5 (what I attached below) for dir function of Shell. See the figure 6 (what I attached below)  for main program of Shell.*Part 4.  In this part of the project, you are going to create a database system with a single table which uses the file system from Project II. The input file will consist of records associated with Art History. The data file you will use as input consists of records with the following format: The data (180 records) is in date.txt file (what I attached below)

• Date : 5 bytes
• End : 5 bytes
• Type : 8 bytes
• Place : 15 bytes
• Reference : 7 bytes
• Description : variable

In the data file, an asterisk is also used to delimit each field and the last character of each record is an asterisk. The width of any record is never greater than 120 bytes. Therefore you can block the data accordingly. This part of the project will require you to implement the following class:

Class Table : Public Filesys

{

Public :



Table(string diskname,int blocksize,int numberofblocks, string flatfile, string indexfile);



int Build_Table(string input_file);

int Search(string value);



Private :



string flatfile;

string indexfile;



int IndexSearch(string value);

};

The member functions are specified as follows :

• Table(diskname,blocksize,numberofblocks,flatfile,indexfile) This constructor creates the table object. It creates the new (empty) files flatfile and indexfile in the file system on the Sdisk using diskname.
• Build_Table(input_file) This module will read records from the input file (the raw data file described above), add the records to the flatfile and create index records consisting of the date and block number, and then add the index records to the index file. (Note that index records will have 10 bytes .. 5 bytes for the date and 5 bytes for the block number.)
• Search(value) This module accepts a key value, and searches the index file with a call to IndexSearch for the record where the date matches the specified value. IndexSearch returns the blocknumber of the block in the flat file where the target record is located. This block should then be read and the record displayed.
• IndexSearch(value) This module accepts a key value, and searches the index file indexfile for the record where the date matches the specified value. IndexSearch then returns the block number key of the index record where the match occurs.

See the figure 7 (what I attached below) for the main program of Shell which includes a search command. 

Oliver’s business is now growing. He built a company and has sales agents and sales supervisors working for him all over England. He realizes using google spreadsheets is not sustainable. 

He wants to invest in a scalable system and he is thinking to recruit a software engineer and a data engineer (you). 

The software engineer has to come up with a mobile app that allows the sales agents to report their sales from the app. 

The app should be connected with a data pipeline that would eventually make the data ready for analysis. 

– What would be your strategy to build a strong and reliable data pipeline and how will you structure it ? Explain the different steps for processing the data, what makes each step important? 

Mention which tools would you use for each of these steps. Feel free to argument as much as you feel it relevant You’re free to make assumptions about the mobile app e.g. The raw data is stored in a No-Sql database… 

Watch the following videos on Digital Marketing:

Digital Marketing Strategies 2020 and Beyond: https://www.youtube.com/watch?v=bGQG_-OG6fs

Marketing Technology: https://www.youtube.com/watch?v=Q8yGCS0q0dk

After watching the videos, provide a video reflection paper that addresses the following. 

1) What are 3 key aspects of digital marketing in the future the videos highlighted as essential to know?

2) What key digital marketing technique or strategy do you believe is the most interesting and why?

3) What is the overall impact the videos suggest marketing technology has to be able to provide competitive advantage for a company?

4) What are the key fundamentals of marketing technology the video prescribes that all businesses should understand?

Paper should be 4-5 pages, double spaced, in Times New Roman, 12pt font, double spaced. Minimum of video references mentioned. Title page and references page required, but does not count towards minimum. 

1-The Packaged Software has a property, “Rarely a perfect fit with business needs”. What do you mean by this property? Explain in your own sentences.

Internet-related crime occurs every minute. Cybercriminals steal millions of dollars with near impunity. For everyone that is captured nearly 10,000 or not captured. For every one successful prosecuted in a court of law, 100 get off without punishment or with a warning. Why is it so difficult to prosecute cybercriminals?

Please make your initial post and two response posts substantive. A substantive post will do at least TWO of the following:

• Ask an interesting, thoughtful question pertaining to the topic
• Answer a question (in detail) posted by another student or the instructor
• Provide extensive additional information on the topic
• Explain, define, or analyze the topic in detail
• Share an applicable personal experience
• Provide an outside source (for example, an article from the UC Library) that applies to the topic, along with additional information about the topic or the source (please cite properly in APA 7)
• Make an argument concerning the topic.

At least one scholarly source should be used in the initial discussion thread. Be sure to use information from your readings and other sources from the UC Library. Use proper citations and references in your post.

Read the ModMeters Case Study on pages 82-85 in the textbook. Answer the Discussion Question at the end of the Case Study. Your responses must be complete, detailed and in APA format. See the sample assignment for expected format and length. Case study paper must be completed in APA style format.  Attached document is the case study pages from 82-85  and also the preferred template for the assignment.

Provide a reflection of at least 500 words (or 2 pages double spaced) of how the knowledge, skills, or theories of this course have been applied or could be applied, in a practical manner to your current work environment. If you are not currently working, share times when you have or could observe these theories and knowledge could be applied to an employment opportunity in your field of study. 

Requirements:

Provide a 500 word (or 2 pages double spaced) minimum reflection.

Use of proper APA formatting and citations. If supporting evidence from outside resources is used those must be properly cited.

Share a personal connection that identifies specific knowledge and theories from this course.

Demonstrate a connection to your current work environment. If you are not employed, demonstrate a connection to your desired work environment. 

You should NOT provide an overview of the assignments assigned in the course. The assignment asks that you reflect how the knowledge and skills obtained through meeting course objectives were applied or could be applied in the workplace. 

The assignment will be graded using the following criteria:

(Maximum # of Points Per Area)

Grammar/Spelling/Citation: Make sure all work is grammatically correct, spelling is 100% accurate, and cite all sources in-text/at the end of the paper where applicable. 

Technical Connection: Make the paper relevant to the course and its connection with your current classwork. Discuss how what you have learned can be applied to your work or future work. 

Word Count: The minimum word count is 500 words. 

Personal Connection – 4 Points: How does this course and the experiences you have been taught in  impact your personal work. 

 Select any one from the below key terms.

Key Terms:

• Styles of Negotiation
• Anchoring in Negotiation
• Mediation
• Arbitration

DEFINITION: a brief definition of the key term followed by the APA reference for the term; this does not count in the word requirement.

SUMMARY: Summarize the article in your own words- this should be in the 150-200 word range. Be sure to note the article’s author, note their credentials and why we should put any weight behind his/her opinions, research or findings regarding the key term.

ANALYSIS: Using 300-350 words, write a brief analysis, in your own words of how the article relates to the selected chapter Key Term. An analysis is not rehashing what was already stated in the article, but the opportunity for you to add value by sharing your experiences, thoughts and opinions

This week we focus on globalization concepts.  Please explain the concept of globalization and the role information technology has in the global market.