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AIN 2601 > 1. Data and Computerised Information System Process > Flashcards

1. Data and Computerised Information System Process Flashcards

1
Q

What is the basic flow diagram associated with data processing?

A

Activities -> data input -> processing -> data output -> making decisions

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2
Q

When are better decisions made?

A

When there is easy access to information

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3
Q

What is the Mneumonic for the characteristic of information?

A

Are all computers easy for real robots simply starter test vehicles?

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4
Q

What are the characteristics that information should have?

A
  1. Accessible
  2. Accurate
  3. Complete
  4. Economical
  5. Flexible
  6. Reliable
  7. Relevant
  8. Simple
  9. Secure
  10. Timely
  11. Verifiable
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5
Q

What is raw data?

A

Data in the form of hard copy or input in the CSI, but h not yet been processed

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6
Q

Is raw data valuable?

A

Not until it has been processed

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7
Q

What are the characteristics that raw data must be?

A
  1. Accurate
  2. Complete
  3. Reliable
  4. Verifiable
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8
Q

What is the quality of information linked to?

A

The quality of raw data that been inputed

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9
Q

What is information?

A

Raw data that has been processed

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10
Q

What is a source document?

A

The first recorded document of an activity

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11
Q

What are the two methods that data can be input into the CIS?

A
  1. Batch input

2. Online input

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12
Q

When raw data is captured, she does it go?

A

The CIS transaction file

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13
Q

What is batch input?

A

Where similar source documents are grouped together and then input into the CIS periodically

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14
Q

When is batch input used?

A

When huge numbers of source documents are captured and info is only needed at the same frequency as data capturing

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15
Q

What is the advantage of batch input?

A

Economies of scale, because data is captured at one point instead of being dispersed

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16
Q

What is the disadvantage of batch input?

A

The CIS is not always up to date all the time

17
Q

What is online input?

A

It is the immediate capture of data at the point of sale

18
Q

What is an example of online input?

A

Supermarkets use barcodes and terminals to capture data immediately

19
Q

What is the main advantage of online input?

A

The CIS is up to date immediately

20
Q

What is the disadvantage of online input?

A

It costs more because of the required hardware

21
Q

What are the different methods of processing data?

A
  1. Classifying data
  2. Performing calculations
  3. Sorting data
  4. Summarizing data
  5. Transforming data
22
Q

What is classifying data?

A

Sorting data into certain categories. E.g. Cash or credit sales

23
Q

What is performing calculations of data

A

?

24
Q

What is sorting data?

A

Putting it into an orderly sequence

25
Q

What is summarizing data?

A

Condensing it to fit a certain criteria

26
Q

What is transforming data?

A

Turning it into a graph etc.

27
Q

What are the processing types?

A
  1. Batch processing

2. Real-time processing

28
Q

What is batch processing?

A

When the transaction files are processed into master files periodically at certain points

29
Q

What is the disadvantage of batch processing?

A

The master files are only up to date when they are periodically updated

30
Q

What is real-time processing?

A

The transaction files are immediately updated to master files

31
Q

What is an advantage of real-time processing?

A

The master files are always up to date

32
Q

What are the two types of output?

A
  1. Batch output

2. Interactive output

33
Q

What is batched output?

A

All requests are batched together and received periodically

34
Q

What is a disadvantage of batch output?

A

User have to usually wait for their information

35
Q

What are the advantages of batch outputs?

A
  1. Reports will be consistent all the time

2. Extraction of reports can be scheduled over downtime therefore optimizing computer resources

36
Q

What is interactive output?

A

Where the users can access the CIS and retrieve information at any point

37
Q

What is a drawback of interactive output?

A

Computer resources may not be used efficiently

38
Q

What is a flat file environment?

A

Where the users of data have their own files and do not share information with each other.
E.g. Spreadsheet users that each have their own

AIN 2601 (3 decks)

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