Flashcards
Data and Verification
Cards in this deck (18)
- 1GIGO?Garbage in, Garbage out, If you put garbage into the computer then you get garbage out of it
- 2Data? Example?Data- Raw facts and figures with no meaning e.g. readings from sensors and survey facts. Data can be numbers, words, images or sound
- 3Processing? Example?Data is processed by a computer. Performing calculations or arranging the data into a meaningful order. Example would be working out an athletes average age over three years
- 4Information?Data that has been processed by the computer. Data+ meaning+ context= Information
- 5Knowledge?Derived from information by applying rules to it, Knowledge is the application of information to a situation.
- 6Encoding? Example?Assigning codes to the data reducing its size. e.g. clothes sizes= xs, xl, m
- 7Encoding advantage?Takes up less storage space, easily transferrable, easier to back
- 8Encoding disadvantage?Easily stolen, training needed, security problem, viruses
- 9Transcription error? Example?Error made when typing in data using a document as the source of the data. Example, mishearing what a person says over the telephone and entering it into the computer
- 10Transposition error? Example?Error made when characters are swapped around so they are in the wrong order. Example, faceboko instead of facebook
- 11Check digit? Example?A decimal or alphanumeric character added to a number for the purpose of detecting the sort of errors humans make normally on data entry. Example, account numbers will have check digits to check the numbers inputted are correct
- 12Range check? Example?Data validation technique which checks that the data input into a computer is within a certain range. Example would be that age of children when they sign up for facebook, have to be 13
- 13Presence check? Example?Is a check that data is entered into the correct fields. Example, username and password on facebook
- 14Validation checks?Checks the developer of a solution sets/ creates using the software in order to restrict the data that a user can enter to reduce errors.
- 15Batch Total? Example?A meaningful total that is used to check that the computer has input all the data. For example adding all the totals of a batch of sold ebay items
- 16Hash total?Meaningless total of numbers such as order numbers used to check that all the data has been entered
- 17Parity Check ?Example?Check to make sure that the data sent is the same that is received when data is transmitted from one computer to another. Example, would be an email sent between people.
- 18Verification? Example?Checking that the data being entered into the ICT system perfectly matches the source of the data. Example, checking the text/ data in a an email and making sure when it arrives to the other person that no errors have occurred.
Information
- Description
- ICT Flashcards on Data and Verification, created by laurenhall on 15/10/2014.
- Created by
- laurenhall
- Views
- 6
- Rating