Chapter 10: Processing Integrity and Availability Controls Flashcards Preview

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Flashcards in Chapter 10: Processing Integrity and Availability Controls Deck (42)
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1

turnaround document

a record of company data sent to an external party and then returned by the external par for subsequent input to the system

2

field check

an edit check that tests whether the characters in a field are of the correct field type (e.g., numeric data in numeric fields)

3

sign check

an edit check that verifies that the data in a field have the appropriate arithmetic sign

4

limit check

an edit check that tests a numerical amount against a fixed value

5

range check

an edit check that tests whether a data item falls within predetermined upper and lower limits

6

size check

an edit check that verifies that the data in a field has the appropriate arithmetic sign

7

completeness check (or test)

an edit check that verifies that all data required have been entered

8

validity check

an edit test that compares the ID code or account number in transaction data with similar data in the master file to verify that the account exists

9

reasonableness test

an edit check of the logical correctness of relationships among data items

10

check digit

ID numbers (such as employee number) can contain a check digit computed from the other digits

11

check digit verification

recalculating a check digit to verify that a data entry error has not been made

12

sequence check

an edit check that determines if a batch of input data is in the proper numerical or alphabetical sequence

13

batch totals

the sum of a numerical item for a batch of documents, calculated prior to processing the batch, when the data are entered, and subsequently compared with computer-generated totals after each processing step to verify that the data was processed correctly

14

financial total

a type of batch total that equals the sum of a field that contains monetary values

15

hash total

a type of batch total generated by summing values for a field that would not usually be totaled

16

record count

a type of batch total that equals the number of record processed at a given time

17

prompting

an online data entry completeness check that requests each required item of input data and then waits for an acceptable response before requesting the next required item

18

closed-loop verification

an input validation method that uses data entered into the system to retrieve and display other related information so that the data entry person can verify the accuracy of the input data

19

header record/label

type of internal label that appears at the beginning of each file and contains the file name, expiration date, and other file identification information

20

trailer record/label

type of internal label that appears at the end of a file; in transaction files, the trailer record contains the batch totals calculated during input

21

transposition error

an error that results when numbers in two adjacent columns are inadvertently exchanged (e.g., 64 is written as 46)

22

cross-footing balance test

a processing control which verifies accuracy by comparing two alternative ways of calculating the same total

23

zero-balance test

a processing control that verifies that the balance of a control account equals zero after all entries to it have been made

24

concurrent update controls

controls that lock out users to protect individual records from errors that could occur if multiple users attempted to update the same record simultaneously

25

checksum

a data transmission control that uses a hash of a file to verify accuracy

26

parity bit

an extra bit added to every character; used to check transmission accuracy

27

parity checking

a data transmission control in which the receiving device recalculates the parity bit to verify accuracy of transmitted data

28

fault tolerance

the capability of a system to continue performing when there is a hardwire failure

29

redundant arrays of independent drives (RAID)

a fault tolerance technique that records data on multiple disk drives instead of just one to reduce the risk of data loss

30

uninterruptible power supply (UPS)

an alternative power supply device that protects against the loss of power and fluctuations in the power level by using battery power to enable the system to operate long enough to back up critical data and safely shut down.