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Software (System Software (Includes the operating system and all utility…
Software
System Software
Includes the operating system and all utility programs which enable the computer to operate the hardware and application software
Examples: Assembler, Detugger, Compliers, File Mgmt Tools, Operating system and Utilites
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Application Software
Enables the computer to do a particular task, such as word-processing and spreadsheet programs.
Memory Management- Allocate internal memory (RAM) to progress and data that the user is currently using, retrieving and storing of data on the external memory devices
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Batch Processing
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It is processed together without human invention, at night time.
Utility bills- producing bills for water, gas, telephones, electricity bills
Producing monthly bank or credit card statements.
Utility Applications
Utility applications is a program that carries out a specific task to assist the operating system, such as:
Disk defragmenting.
Task Scheduling.
Backup.
Restoring Data.
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Peripheral Management- Controls all peripheral devices (input/output) and handles user requests e.g to print the work.
System Security- Checking and controlling user access to programs and data to prevent unauthorized access.
Master File
Stores information which does not change between and is updated using the transaction file at the end of the batch process ready for the next billing period.
The Information which does not change includes:
Customer account number.
Customer Name.
Address Details.
Last meter reading.
amount of electricity used over 3 months.
Transaction File
Stores the current data, such as meter reading.
Contains the customer account number (the key field of the master file)
Is sorted into same order as the master file before updating (to make it easier to match two records with the same key).
Is used to update the master file.
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