Premium Essay

Server Side

In: Computers and Technology

Submitted By ralfred
Words 1067
Pages 5
Part 1

1. What is the difference between interactive processing and real-time processing?
Interactive processing is when there is a continuous exchange of information between the computer and user whilst performing tasks. Examples include entering information into a query in a database or information into a word processor. Real time processing means that there is a continual input, process and output of data. It may be a situation whereby a user sends in transactions and awaits a response from a distant computer before continuing. We see this happening when we use telephone banking to transfer funds from our savings to our credit card and the money is accessible immediately.

Real Time Processing [Online]. Available from http://www.answers.com/topic/real-time-processing-e-business-term. (Access 14 July 2010).
Interactive Processing [Online]. Available from: http://linux.about.com/cs/linux101/g/interactiveproc.htm. (Accessed 14 July 2010).

2. What complications could arise in a time-sharing system if two processes require access to the same file at the same time? Are there cases in which the file manager should grant such requests? Are there cases in which the file manager should deny such requests?

If two processes require access to the same file at the same time, two main situations could arise:
1. Both processes attempt to read the file in which there is no harm. If the file is used as merely input for the processes and is not being changed then this is ok such as in the case files that contain instructions.
2. One or both processes attempt to update the file can lead to data corruption and or deadlocks. Picture the processes are depending on information in the file that goes in a sequence 1, 2, 3, 4, 5. Process A begins to read the first and gets to 3. At that time Process B starts and gets to 2, but process A is making...

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