2. Ads and dis of using application package
• Ads:
- The packages can be used immediately
- Documentation is generally good
- It can be used on a varisty of machines
- It is cheaper as the costs of the packages are shared between many users
- Comprehensive on line help information and guided tutorials available
- Easily remembered command syntax
- Can be used in confunction with other software in an integrated fashion
• Dis:
- Modifications may be difficult for some applications
- Package may be two generalized to suit user needs
- Some features purchased may not be required
- Support given depends on stability and professionalison of the vendor
- User are required to comply with the owner’s regulations
Question 2. Utility software?
- Certain processing is common to a high proportion of computer users, and so
utility software has been created to cater for this need
- Utility software is intended to be sufficiently flexible to meet most user’s
requirements and is tailored to meet their precise needs by means of parameter
entered prior to use
- Some of the utility programs described below may be incorporated into the OS
that is used with a particular computer
File conversion: this convers the transference of data from any
medium to any other
File copying: an exact copy of a data set is made on to another lot
for the same type of storage medium
File reorganisation: direct access, files over flow records are stored
in designed blocked, this is acceptable up to a point but from time
it si necessary to reorganise the file so as to remove the overflow
File maintenance(amendment): this procedure involves the
straightforward insertion and deletion of records into or form
sequential files
Sorting: is frequently necessary in order to arrange a set of records
into a certain sequence based on their key values
Dumping routines: a dump routine is used in confunction with a
restfirt program ...
House keeping operations: there are programs or parts of a
programs not directly concerned with the solution of the problem in
hand
Trace routines: these entails, the dumping, display or printing of th
program or other contents of the main store during program testing
to facilitate error detection
- Utilitys are commonly used to perform these functions:
Copying of files
Sorting of data
Merging of files
Data recovery
Reformating of records by reamanging their fields
File reorganization
Reporting of sys status and usages
Question 3. System software?
There are three main types of memory placement policy:
- First fit
- Best fit
- Worst fit
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