Ais Exam 2 Chp 10

Front 1

Turnaround document

Back 1

A record of company data sent to an externl party and then returned by the external party for subsequent input to the system.

Front 2

Field check

Back 2

An edit check that tests whether the characters in a field are of the contract field type.

Front 3

Sign check

Back 3

An edit check that verifys the data in a field have the appropriate arithmetic sign.

Front 4

Limit check

Back 4

An edit check that tests the numerical amount against a fixed value.

Front 5

Range check

Back 5

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

Front 6

Size check

Back 6

An edit check that ensures the input data will fit into the assigned field.

Front 7

Completeness check

Back 7

An edit check that verifies that all data required have been entered.

Front 8

Validity check

Back 8

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.

Front 9

Reasonableness check

Back 9

An edit check of the logical corectness of relationships among data items.

Front 10

Check digit

Back 10

ID numbers can contain a check digit computed from other digits.

Front 11

Check digit verification

Back 11

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

Front 12

Sequence check

Back 12

An edit check that determines if a transaction file is in the proper numerical or alphabetical sequence.

Front 13

Batch totals

Back 13

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.

Front 14

Financial total

Back 14

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

Front 15

Hash total

Back 15

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

Front 16

Record count

Back 16

A type of batch total that equals the number of records processed at a given time.

Front 17

Prompting

Back 17

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.

Front 18

Closed-loop verification

Back 18

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.

Front 19

Header record

Back 19

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

Front 20

Trailer record

Back 20

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.

Front 21

Transportation error

Back 21

An error that results when numbers in two adjacent columns are insdvertently exchanged.

Front 22

Cross-footing balance test

Back 22

A processing control that verified accuracy by comparing two alternative ways of calculating the same total.

Front 23

Zero-balance test

Back 23

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

Front 24

Concurrent update controls

Back 24

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

Front 25

Checksum

Back 25

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

Front 26

Parity bit

Back 26

An extra bit added to every character, used to check transmission accuracy.

Front 27

Parity checking

Back 27

A data transmission control in which the recieveing device recalculates the parity bit to verify accuracy of transmitted data.

Front 28

Fault tolerance

Back 28

The capability of a system to continue performing when there is a hardware failure.

Front 29

Rddundant arrays of independent drives

Back 29

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

Front 30

Uninterruptable power supply

Back 30

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.

Front 31

Recovery point objective

Back 31

The amount of data the organization is willing to reenter or potentially lose.

Front 32

Recovery time objective

Back 32

The maximum tolerable time to restore an organizations information system following a disaster, representing the length of time that the organization is willing to attempt to function without its information system.

Front 33

Full backup

Back 33

Exact copy of an entire database.

Front 34

Incremental backup

Back 34

A type of partial backup that involves copying only the data items that have been changef since the last partial backup. This produces a set of incremental backup files, each containing the results of one days transactions.

Front 35

Differential backup

Back 35

A type of partial backup that involves copying all changes made since the last full backup. Thus, each new differential backup file contains the cumulative effects of all activity since the last full backup.

Front 36

Archive

Back 36

A copy of a database, masterfile, or software that is retained indefinately as a historical record, usually to satisfy legal and regulatory requirements.

Front 37

Disaster Recovery Plan

Back 37

A plan to restore an organizations IT capability in the event that its datacenter is destroyed.

Front 38

Cold site

Back 38

A disaster recovery option that relies on access to an alternative facility that is prewired for necessary telephone and internet access, but does not contain any computing equipment.

Front 39

Hot site

Back 39

A disaster recovery option that relies on access to a completely operational alternative data center that is not only prewired but also contains all necessary hardware and software.

Front 40

Real-time monitoring

Back 40

Maintaining complete copies of a database at two seperate data centers and updating both copies in real time as each transaction occurs.

Front 41

Business community plan

Back 41

A plan that specifys how to resume not only IT operations but all business processes in the event of a major calamity.