Flashcards
IT Revision
Cards in this deck (21)
- 1Define DataRaw facts and figures, no context
- 2Define InfoProcessed data (put into context)
- 3Define KnowledgeWhat you get when you apply a rule to info
- 4Define EncodingThe use of code in databases to reduce storage space
- 5Advantages of Encoding?- Staff time saved inputting data
- More storage available - 6Disadvantages- Value Judgements = Less Accurate
- 7Explain Value JudgementPeople need to make judgements of what code category something belongs to. Difference of opinion.
- 8Topic 1 Define ProcessingThe use of calculations or ordering data into a more meaningful order
- 9Topic 3 Give examples of formats of info- NON ICT sources e.g. newspaper
- Intranet
- Internet
- CD Rom - 10Topic 3 How do you improve quality of data? (7)- Correctly Targeted
- Understandable
- Quality of info
- Up to date
- Complete
- Relevant
- Accuracy - 11Topic 2 Benefits of good quality info?- Aids decision making
- Easy to monitor progress
- Target resources to gain a competitive advantage - 12Topic 2 Limitations of good quality info?Processing
- Staff need training on databases
- Batch processing lots of data takes time
- Data analysis software is expensive
Data Entry
- Cost of training to operate equipment
- Expensive hardware e.g. barcode scanners
- Time to enter data manually via keyboards
Maintenance
- Technicians required
- Expense of replacing hardware
- Back ups take time
Data Collection
- Staff need training
- Time needed to travel
- Cost of consumables for paper forms - 13Topic 4 What is validation?A check to ensure data is correct, sensible and within reasonable boundaries
- 14Topic 4 What is verification?Checking that data has been copied correctly from one medium to another
- 15Topic 4 Examples of Validation?- Range
- Presence
- Fixed value
- Check digit
- Data type - 16Topic 4 Examples of Verification- Proofreading
- Sending back printouts
- Dual Entry - 17Topic 4 Data errors occur in which 4 stages of a computer system?- Input
- Transcription
- Processing
- Transmission - 18Topic 4 What errors occur in the input stage of a computer?- Incorrect reading of hardware e.g. barcode reader
- Transposition errors by manually entering data and keying in details in the wrong order e.g. Kirsty not Kristy - 19Topic 4 What errors occur in the transcription stage of a computer?- Difficult place names spelt wrong if given via phone
- Transcription errors by copying data from one medium to another - 20Topic 4 What errors occur in the processing stage of a computer?- Hardware breaks down while data is being processed, errors occur
- Incorrect programming e.g. wrong spreadsheet formulas lead to incorrect processing - 21Topic 4 What errors occur in the transmission stage of a computer?- Data can become corrupt when transferred via communication lines or internet
- Parity checks are normally used to ensure receiving computers have the correct data
Information
- Description
- Flashcards on IT Revision, created by 09grif1l on 22/04/2015.
- Created by
- 09grif1l · Apr 2015
- Updated
- Feb 19, 2016
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