IPT Marathon 2006 (1 Viewer)

[ugly14]

so, seeing that we have 2 days to go..i thought a thread is necessary as i haven't been able to concentrate on IPT at all and im sure not many ppl have either.
(this is similar to thread in bio forum)

This is how it works:
1. I'll post a question
2. you answer it & in your answer also include a question for the next person.
3. next person answers.
4. etc etc etc

please remember if you want to ask any questions from options, u must state it otherwise ppl are gonna be confused. :wave:

my question: Identify and describe the operation of TWO methods of error detection that may be used when sending and recieving data.

 

[sauce2k]

1.checksum: the sender counts the total number of one bits in the data block and add this number a binary integer to the end of the block. The receiver then counts the number of one bits in the block again and compare with the one they have received. if there is any difference, it will ask for a re-transmission.

2.Parity check: one extra bit is added to a character so the total number of ones matches with the proposed parity(Even/Odd)

 

[help_me_please]

(well the other guy didn't ask a q so ill put in the third error checking method + new q)

3. cyclic redundancy check (from my notes)
• Like checksum, CRC is a block error detection method. CRC can’t reveal which byte or bytes in a block are faulty.
• An error checking technique used to ensure the accuracy of transmitting digital data. The transmitted messages are divided into predetermined lengths which, used as dividends, are divided by a fixed divisor.
• The transmitting computer performs the CRC calculation and places the result as either a 16- or 32- bit value, at the end of the block. The receiving computer performs the same calculation and compares its answer with the one it receives.
• The remainder of the calculation is appended onto and sent with the message. At the receiving end, the computer recalculates the remainder.

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next question: explain the difference between a flat file and a relational database.

 

[shinji]

Flat file: all the data / info is organised into 1 table and hence, there is the issue of data redundancy

Relation databases, on the other hand, sort data into different tables and links these tables through the use of Foreign and Primary keys (where flat file has only the primrary key). This reduces the data redundancy that is exists in a Flat File database.

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My questions: What is the difference between a database and a database management system (DBMS)?

 

[nrs1990]

A database is the actual data, while a DBMS is the software which provides access to it.

Question:

What's a prototype?

 

[wicked_65]

A Prototype is a working model of an information system that is used to gather additional information that can be used to understand the requirements of the system. Some examples of prototypes include screen and report generators that are presented to users so that they can provide information to better understand the requiremetns of the system. Prototypes also require on constant feedback from users so that the prototype can be further developed in order to understand the requirements of the system. Prototypes can also be used as the basis for further systems development in designing solutions/

Question

Describe issues related to messaging systems (Communications Topic)

 

[Vicsta]

Some Issues include messaging systems; dangers of misinterpretations, privacy and confidentiality, junk maill, power relationships. Internet trading; taxation, employement ramifications, nature of business(no more face to face sales), trade barriers.

Question:
a) describe a protocole?
b) exaplin the difference between the YModem and the ZModem protocols?

 

[wicked_65]

a) A protocol is information that is exchanged between two or more devices that describes the communications link, such as the measurement of speed (bits per second or baud rate), the different types of error detection (parity bit check, check sum or cycle redundancy check) and error correction (retransmission, symbol substitution or error correction code) methods and other general aspects of communications that ensures that the data the receving node or computer received is the same data that the sending node or computer has sent.

b) got no idea and i dont think it would be on the hsc exam (or hopefully not)

Question

What is the purpose of a schema?

 

[ugly14]

Question: What is the purpose of a schema?

Schema is an organised plan of the entire database showing how and where the data is found, descriptions of the data and the data’s logical relationships. The schema in a relational database defines entities, attributes and relationships.

my questions:
(core)
As part of this course you have developed computer-based systems. Use this knowledge and experience to describe how an implementation plan is developed for a project. 3 marks

(transaction processing systems)
Discuss the advantages of a ‘grandfather, father, son’ backup procedure. 2 marks

 

[seremify007]

(transaction processing systems)

Discuss the advantages of a ‘grandfather, father, son’ backup procedure. 2 marks

Advantages of the grandfather, father, son backup procedure are that it ensures that there is always a backup of the data should an issue arise such as data loss or data corruption because there is always a regular creation of a backup. Furthermore, by having multiple generations of backup available, if there has been some form of data error or loss, it's possible to go back not just one day, but further than that (depending on the number of generations of backup which are kept). This is important because the detection of damaged or lost data may not be immediate (eg. it could take 2 days before someone notices data is missing), and by having the grandfather and father backups, it is possible for an administrator to go further back in time and restore the backup, or use the backup to complete missing data.

Schema is an organised plan of the entire database showing how and where the data is found, descriptions of the data and the data’s logical relationships. The schema in a relational database defines entities, attributes and relationships.

my questions:
(core)
As part of this course you have developed computer-based systems. Use this knowledge and experience to describe how an implementation plan is developed for a project. 3 marks

LOL I'm too lazy to do both your questions ugly14 so I'll pass the (core) one on to the next person.

 

[wicked_65]

LOL ditto that seremify007

 

[justinchan]

An implementation plan will detail how the participant will be trained, Type of conversion (direct, phased, pilot, parallel), and how the system will be tested.

Next question:
AMS:
List the reasons for automation
or
List the communication skills needed for dealing with others

 

[ugly14]

List the communication skills needed for dealing with others

communication skills incoperate a variety of strategies and techniques for dealing with others, some of the strategies include:

* active listening- invloves restating, reflecting and summarising the speakersfeelings and ideas.
* conflict resolution- solve arguments and disputes, involves listening to other people's views and looking at the conflictas a problem to be solved
* negotiation skills- invlove discussing a problem and arriving at a consensus
* team building- the process of getting a group of people working together.
each team member negotiates a role in the team with specific responsibilites.

the team leader is resposible for resolving conflicts that may arise and ensure that the project is meeting its goal.


question: Briefly describe FOUR conversion methods, stating both advantages and disadvantages of each method.

 

[Danielk]

question: Briefly describe FOUR conversion methods, stating both advantages and disadvantages of each method.

Direct conversion
The old system is shut down or removed and the new system is immediately installed or put into operation.

Advantages
- Fast
- Users benefit quickly

Disadvantages
- Relies on participants adapting to new system quickly
- No backup system if there are problems
- Any redundancies are immediate

Parallel conversion
During changeover phase, both systems are running together. This method is often used when converting from a non-computer system to a computerised system.

Advantages
- Participants adjust to the new system over time
- Problems with the new system solved prior to closure of old system

Disadvantages
- Extra workload for participants running two systems
- Confusion if discrepancies arise

Phased conversion
Parts of the old system are gradually replaced by the new system until the whole system has been converted.

Advantages
- Participants and users trained in each aspect of system as it is implemented

Disadvantages
- Components of new system often incompatible with old
- Difficulties working with hybrid system

Pilot conversion
Pilot conversion involves trialing the new system in a part of an organisation. This is often used by large organisations where they choose a country, state or region which is only a small part of their operation in which to implement the new information system.

Advantages
- Any difficulties are confined to separate geographic location
- Participants can be trained in the new system at the pilot

Disadvantages
- Pilot site running a different system from the rest of organization




Question 1: Briefly describe the four components of a feasibility study.
Question 2: Explain how a search engine works.
Question 3: Discuss the issues of privacy and security of information held in databases.

 

[shinji]

Question 1: Briefly describe the four components of a feasibility study.

Technical Feasibility: Whether the business has the technology to support this new Information System both in terms of Hardware and Software
Organisational Feasibility: Whether the new system will fit into the organisation and achieve the goals that are laid out for the business
Economical feasibility: does the business have the money to support this new system in terms of maintenance costs, training, technology, etc.
Schedule: Is there enough time to implement teh new system?

Question 2: Explain how a search engine works.

A search engine operates through the use of sending 'web crawlers' to scan the int ernet for any new websites and is stored in a database. the user then types in a keyword which allows them to search throu gh the database and obtain a list of relevant websites

Question 3: Discuss the issues of privacy and security of information held in databases.

-> Accuracy: is the data that is stored in a database accurate?
-> Privacy: Is there any sensitive information being stored about an individual? Are these information being released to other organisations?
-> Access: Access to the personal data. should they have access to it? who actually has ownership of it? Freedom of information act allows individuals to access information being stored about themselves for a fee


im prob wrong about teh issues .. i hate isseus and stuff in IPT =(

TPS: List and describe the characteristics of the TPS

Multimedia System: What's the difference between Animation and video?

Core: What are two ways of searching for data in a database and briefly describe how they work~

 

[ugly14]

TPS: List and describe the characteristics of the TPS

* Rapid Response – Rapid response time is critical. The responding time must be within a few seconds or less.
* Reliability – A breakdown will disrupt operations or even stop the business. For it to be successful, the failure rate must be low. If it does fail then a quick and accurate recovery must be available.
* Inflexibility – It needs every transaction to be processed in exactly the same way as the last.
* Controlled Processing – It must support the organization’s operations. The TPS should enforce and maintain the requirements.

Multimedia System: What's the difference between Animation and video?

* Animation - the displaying of a series of still computer generated images in rapid succession to create the illusion of motion.

* Video – combination of pictures and sound actually taken with a camera, displayed over a period of time. Video splits up a series of frames and plays them one after the other. Animation starts with independent images and puts them together to form an illusion.

do these make sense?

Core: What are two ways of searching for data in a database and briefly describe how they work~

i'll leave this for someone else to do :wave:

 

[maskd]

Multimedia System: What's the difference between Animation and video?

The difference between animation and video is that video starts with a continuous movement that is broken up into frames while animation is a series of still images that are placed together to form the illusion of movement. Video also has the ability to carry audio, while animation is strictly visual.

Core: What are two ways of searching for data in a database and briefly describe how they work~

The two ways to search data in a database are "Query By Example", in which an example of the type of data is searched for; ie. To search for somebody named Jacob, "Name = Jacob" will search for all entities in the database in which the "Name" column matches Jacob. The other method of searching for data in a database is through the use of relational and logical operators. Relational operators (=, <, >, =>, <=, <>) indicate the relationship between two expressions. Logical operators (AND, OR, NOT) are used to combine two queries together, so that a search can be carried out on one or more fields.

Question (An easy one, but you never know ):
Define URL, and break down and describe the different parts of a URL.

 

[shinji]

You forgot about SQL my friend =]. hehe

URL = Uniform resource locator. it describes the address of a specific file on the ineternet.
the first section contains the types of protocols to be used in the transaction.
Eg: HTTP (hyper text transfer protocol) or FTP : file transfer protocol.

then there is the domain name of the file. this can be replaced by an IP address of a computer to support direct access to the computer.
EG: http://244.102.400.120 or http://www.deviantart.com

then there is the link to the path of the file so an individual is able to see the actual file.



doesn't make sense: getting tired. haha and that was mostly bulllshit =]

Question: list and describe the different communication settings

 

[Oberst Fan]

A URL (Uniform Resource Locator) is the address of a file or resource on the Web. There are 3 parts to a URL: Protocol, Domain Name and File Path. Is that too Brief?

What are the differences between Context Diagrams and Dataflow Diagrams? Thats a pretty poor question but yeh...

 

[Snowboi2k]

Question: list and describe the different communication settings

The characteristic of the communication system are the basis of the communication systems which include;

Bits per second is the speed of transmission

Data bits are the number of bits in each group of data

Parity is whether the data contains a parity bit for error detection. It is odd, even or none.

stop/start bits are the number of stop and start bits used in asyncrhonous transmission.

Flow control is the software handshaking protocol



Question: Briefly describe three network topologies