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a) Briefly explain six functional areas Served by a computer operating system. b) Outline six activities undertaken during the information system implementation and evaluation stage. c) Highlight eight...

      

a) Briefly explain six functional areas Served by a computer operating system.
b) Outline six activities undertaken during the information system implementation and
evaluation stage.
c) Highlight eight situations in a typical, office environment where connection between
computing devices might be required.

  

Answers

Kavungya
a) Functional areas served by a computer operating system
Backing storage management
The operating system uses device drive to control the operations of storage devices.
Processor time management
The operating system allocates processor time to the tasks executed in the main memory
Interrupt handling
An interrupt is an event that alters the sequence in which a computer can execute instructions.
An output is usually generated by computer hardware.
Job scheduling
In multi user multi programming system the computer usually has several jobs to execute at any
one time for effective companion of the results.
They are commonly put in a queue which creates and maintained by t^e operating system.
Main memory space management
All computers have limited memory space and the operating system controls the usage of the
memory space to ensure that it is optimized. The operating system takes some of the space and
most of the reminder is taken up by the operating programme.
Input/output device management
The operating system manager’s input/output devices by maintaining controlled input or output
processing some memories space is allocated for input data while some location hold data
received from particular input/output devices,

b) Activities undertaken during the information system implementation and evaluation
stage
The following activities are performed as part of the Implementation Phase.
All affected users and organizations affected are notified of the implementation. Additionally, it
is good policy to make internal organizations not directly affected by the implementation aware
of the schedule so that allowances can be made for a disruption in the normal activities of that
section. The notification should include:
- The schedule of the implementation
- A brief synopsis of the benefits of the new system
- The difference between the old and new system
- Responsibilities of end user affected by the implementation during this phase
- The process to obtain system support, including contact names and phone
numbers
Typically, implementation includes converting existing data for use in the new system. The tasks
for this effort are two-fold: data input and data verification. When replacing a manual system,
hard copy data is entered into the automated system. Some sort of verification that the data is
being entered correctly should be conducted throughout this process. This is also the case in data
transfer, where data fields in the old system may have been entered inconsistently and therefore
affect the integrity of the new database. Verification of the old data becomes imperative to a
useful computer system.
One of the ways verification of both system operation and data integrity can be accomplished is
through parallel operations. Parallel operations consist of running the old process or system and
the new system simultaneously until the new system is certified. In this way if the new system
fails in any way, the operation can proceed on the old system while the bugs are worked out.
To ensure that the system is fully operational, install the system in a production environment.
During this phase, the documentation from all previous phases, is finalized to align it with the
Prior to the Operational Readiness Review, the Authority to Operate must be obtained and a
System of Record Notice published.
Final versions of the following documents are prepared during the Implementation Phase, and
are required before the project proceeds to the Operations and Maintenance Phase:
- Business Product
- Project Completion Report
- Service Level Agreements (SLAs) and Memoranda of Understanding (MOU)
- Contingency/Disaster Recovery Plan ..
- Operations and Maintenance (O&M) Manual
- Systems Security Plan
- Security Risk Assessment
- Training Plan
- Training Materials
- User Manual

c) Situations in a typical office environment where connection between computer devices
might be required.
- Monitoring activities
- Controlling
- Communication
- Producing reports
- Decision making
- Updating records
- Storage of records
- Summarizing data
Kavungya answered the question on May 13, 2019 at 13:38

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