Hey everyone!! I was doing some study *for once in my life* and I was thinking about the following questions in IPT. Can someone please help me in answering them!! Thanx! If you are going to reply to a specific question just put that question number in the reply.
1. What is the broad difference between combination and non-linear storyboards?
2. The Heinemann text defines schema as the data definition of the database. It is an organized plan of the DB showing how and where data is found, descriptions of the data and the datas logical relationships. The question I ask is what does it mean and how does a schema describe how and where data is found?
3. Data modeling is the process of identifying entities, the relationships of those entities and the attributes of those entities in a relational database. Can someone give me an example of data modeling in real-life terms?
4. Can someone please further explain the concept of DKNF normalization?
5. A distributed database is a DB that is located on more than one site and acts as a single collection point of data but is geographically dispersed. So what I would like to know is an example of this an airline reservation system? If so can someone further explain the concept of a two-phase commit?
6. The Heinemann text defines SQL as a query that allows users to search and manipulate data in a relational database [sic]. How can a SQL manipulate data in a relational database? I thought there primary and only use was to search a relational database.
7. The Heinemann text defines Y-Modem as an extension to X-modem. Features include increased readability of errors, transfer of file names and increased file transfer [sic]. What is increased readability of errors and how does that work? Because it would still use one of the standard error checking methods i.e. parity, checksum or CRC. But if X-modem supported checksum and later versions CRC There would be no increased readability of errors. Or do I just have the entire concept of readability of errors wrong? If so, could someone please explain this!
8. X-modem transfers data in blocks of 128 bytes long. If a file is, for example, 170KB big, and we were using the X-modem protocol, it would transfer 128 bytes of data and then what would happen? A confirmation? The next block of data? Error Retransmission?
9. The Heinemann text defines Z-modem as having a Variable Block Size yet the excel defines it as having block size of 1024 bytes Which is correct? And if variable block size is correct, how does it determine the block size?
10. Do extranets require a password to access? What is the line we can draw between extranet of an organisation and the internet website for the organisation?
11. Can someone please clarify the concept of client-server architecture?
1. What is the broad difference between combination and non-linear storyboards?
2. The Heinemann text defines schema as the data definition of the database. It is an organized plan of the DB showing how and where data is found, descriptions of the data and the datas logical relationships. The question I ask is what does it mean and how does a schema describe how and where data is found?
3. Data modeling is the process of identifying entities, the relationships of those entities and the attributes of those entities in a relational database. Can someone give me an example of data modeling in real-life terms?
4. Can someone please further explain the concept of DKNF normalization?
5. A distributed database is a DB that is located on more than one site and acts as a single collection point of data but is geographically dispersed. So what I would like to know is an example of this an airline reservation system? If so can someone further explain the concept of a two-phase commit?
6. The Heinemann text defines SQL as a query that allows users to search and manipulate data in a relational database [sic]. How can a SQL manipulate data in a relational database? I thought there primary and only use was to search a relational database.
7. The Heinemann text defines Y-Modem as an extension to X-modem. Features include increased readability of errors, transfer of file names and increased file transfer [sic]. What is increased readability of errors and how does that work? Because it would still use one of the standard error checking methods i.e. parity, checksum or CRC. But if X-modem supported checksum and later versions CRC There would be no increased readability of errors. Or do I just have the entire concept of readability of errors wrong? If so, could someone please explain this!
8. X-modem transfers data in blocks of 128 bytes long. If a file is, for example, 170KB big, and we were using the X-modem protocol, it would transfer 128 bytes of data and then what would happen? A confirmation? The next block of data? Error Retransmission?
9. The Heinemann text defines Z-modem as having a Variable Block Size yet the excel defines it as having block size of 1024 bytes Which is correct? And if variable block size is correct, how does it determine the block size?
10. Do extranets require a password to access? What is the line we can draw between extranet of an organisation and the internet website for the organisation?
11. Can someone please clarify the concept of client-server architecture?