IPT


 * TPS holiday tasks**

use the handout provided and read the pages referred to and attempt the following tasks in your wiki.
 * create a wiki, at** [|**www.wikispaces.com**] **use your sina details user name only. john smith is john.smith. DO NOT place any personal details EVER on the wiki.

email to** **gro@maristpagewood.catholic.edu.au** **the url to your wiki an rss feed will be created so that the work completed can be monitored.

you will need to respond to the following on a daily basis.** copy and paste the date/items to be done corresponding to the daily task into your wiki home page and then respond.

4 july: first page A transaction processing system is the process of changing or creating data .examples, orders,sales,taxes,purchasing,wages,hring emplyees,etc. Is a method od processing data. the processing involves collecting and storing data at the time of the event.the process involves multiple transactions at the same time. Example, a telephone bill. Real time processing is an immediate process of data which involves collecting and storing data on the time that the process is done. An example an ATM is a real time processing Data validation is the process of ensuring that a program operates on clean, correct and useful data
 * what is a transaction processing system?**
 * What is batch processing?**
 * what is real time processing?**
 * what is data validation?**

5 july: second page Recovery testing is the activity of testing how well an application is able to recover from crashes, hardware failures and other similar problems. Sequential processing is the processing that occurs in the order that it is received.
 * what is recovery testing?**
 * what is sequential processing?**

6 july fourth and fifth pages When update in a real time or uses a direct access storage devices. it allow the updating of the data in online system which is located at a direct acces storage device. when undating in a real time it involves: reading the key field from the transaction file record, using the hash storage calculation to locate the same record in the master files. in february 2000 the world's busiest web sited were the victims of distributed demial of service which is known as DDoS attacks. a plan would be to security the internet and all possible newtork from the attack.
 * describe updating in real time.**
 * give the outline of a disaster plan designed to deal with a DDoS attack.**

7 july page 152 and 153 question 1 and 3 data/information participants and users information technology Poeple still use batch processing because it might me more effect then real time processing in what transation they are doing.
 * Name three of the components of transaction processing systems.**
 * Why is batch processing still commonly used in tranaction processing system.**

8 july page 148 and 149 Data/information:** the total of purchase, product price and details ad date of transaction.
 * outline the information system for a point of sale transaction processing system. hint the data/information; the participants and users and the information technology.
 * Participants and users:** the participants are those who are dirctly involved in the POST. the uses are the benefit from the services.
 * Information technology:** a prints the receipt, calculates the change due and accesses a networked computer containing stock inventory systen is by stock detial.

9 july page 152 collecting in tranaction processing data collection in transaction processing includes sone specialised hardware such as MICR machines, barcode scanners and automatic teller machines. Are magnetic Ink character recognition is a system that uses unique characters and ink that is read by a magnetic reader and then translared into characters.Barcode scanners are optical scanning input devices that recognise a barcode on merchandise. Automatic teller machines are computer terminals that are connected via a wide are network to a central back computer. Data can be collected from paper forms the strenght of using paper forms are that they can be stoed and processed in batches and they can be signed, unlike eletronic forms. however there is disadvantage of paper forms which are they can accept data that is invalid and the comstomer may miss required data. a data entry operator could enter the detials from a paper form into the insurance conpany's database. data collecting from screens is the data that is entry operator to match their screen cursor position with the next items to be copied from the paper form. the sceen design depends in who is going to be using the system, how often it is going to be used and the nature of the data entry.
 * write 5 lines on "inputting data"**
 * write 5 lines on "collecting from forms"**
 * write 5 lines on "collecting from screens"**

10 july next page no number when a system breaks down there is alway a safe guards against failure. things that can make it failure a virus or hacker attack against a major website. failires may be unpredicatable but they can still be prepared for and managed. its like a fire drikk, a system disaster plan should be tested on a regular basis. it does mean shutting down the system but test the backup procedures, check and test the replacemant equipment.
 * outline "safe guards against failure"**

11 july page 146 and 147 the technology that would be need for the transaction processing system is access to internet and a database system which record in the data in .and EFTPOS transaction system. are printer which prints the tickets out and a backup system which storage the data in case of failures.
 * the flight resevation information system is discussed here. look at the data/information and the participants and users. add to this the information technology that would be needed.**

12 july page after 147 Transaction processing provides information to all levels of workers in an organisation.mangers are more interested in the overall picture of an organisation than the results of individual transaction.
 * write three sentences explaining output from a system becoming input for another system.**

13 july second page after 147 security:** is a important because data can be expensive to collect,confidential, vital to an organisation's operation, or can cause harm if misused. there a many reason for accuracy in a transactio system they are to test that itt is the correct data type, testing that it is within a reasonable range or even double entry. in a data in every system will contian factual errors like wrong addresses and incorrect stock levels. the datd may be 100 accuracy but the data integrity cant be fully correct.
 * write a sentence explaining the three terms
 * accuracy:**
 * integrity:**

14 july next page Data bias can start with the collection of data. how and where data are collected and who collects them can introduve bias, both intentional and accidental. the WWW has become a popular tool in the home. web-based surveys are also high in biased. statistical techniques used in data collection, such as random sampling, do not apply to web-based surveys.
 * explain your understanding of bias in data collecting.**

15 july next page write a sentence on each.** Paper records in their original har-copy format have several disadvantages they that a separate index or catalogue system must be maintained to allow documents. Document imaging is scanning and saving the image file. this is virtually a computer version of a document photocopier. Optical character recognition is like a document imaging which each paper is scanned and saved as an image file. the character recognition software then processes the image to identify the shapes of indivdial text characters. Electronic documents is a currently no unicersally accepted standard for storing and presenting electronic documents. Electronic document management systems is the creation od=f EDMS it contain a database program to search and organise documents stored in a vaeiety of common formats such as HTML.
 * provide five ways to store paper records of tranactions.

16 july next page write a sentence on sequential data storage** Sequential data storage is simply a list of alphanumeric charaacters stored one after the other. when savinging text to a disk, the system simply places the individual characters in sequence in the text file. indexed sepuential data storage is made up of the main data file and a separate, smaller index file.an indexed sequential data file has a sparate file value and location of every data record in the main file.
 * storage and retrieval of digital data in databases and files
 * write a sentence on indexed sequential data storage**

17 july next page write a sentence on tape-based updates** Tape-based updates is another method of recording and storing transactions was magnetic tape. the steps involves: create a transaction file add records to the transaction file sort the transaction file create a new master file by merging the old master file and the transaction file.
 * updating in batch
 * what are the steps in a batch update process?**

18 july last three pages Grandfather,father,son this backup system backups the current backup and the two previous ones. each backup is considered to be a single generation in a family sequence. each time a new backup is made it becomes the new son, the previous son then becomes the new father and so on. the advantage of this method is that it allows data to be recovered from the last three backup cycles. Off-site storage This backup system keep data from theft, fire and water damage. some companies use a specialed backup service that performs the backup and takes the backup copies off-site for storage. Secure on-site storage A fireproof safe or a well protected safe room aresuitable storage locations for backup data on-site. some industries, such as banking, require extra precautions bacause a failure of their central computer will mean available the following solutions.
 * name and outline the backup procedures described.**

Data warehousing is data that is bought together al the information stored in the variours data formats and structured from an organisation into a single data store.
 * what is datawarehousing?**