Chapter 10

Question 1

Turnaround document

Answer 1

a record of company data sent to an external party and then returned by the eternal party to the system as input.

Question 2

Field check

Answer 2

determines whether the characteristics in a field are of the proper type. (no letters in a zip code entry)

Question 3

Sign Check

Answer 3

determines whether the data in a field have been appropriate arithmetic sign (no negatives)

Question 4

Limit Check

Answer 4

tests a numerical amount against a fixed value. (work hours are less or equal to 40 hours a week)

Question 5

Range check

Answer 5

tests whether a numerical amount falls between predetermined lower and upper limits.

Question 6

size check

Answer 6

ensures that the input data will fit into the assigned field. (SS number is always 8)

Question 7

Completeness check

Answer 7

on each input record determines whether all required data items have been entered.

Question 8

Validity Check

Answer 8

compares the ID code or account number in transactions data with similar data in the master file to verify that the account exists (school id number)

Question 9

Reasonableness test

Answer 9

determines the correctness of the logical relationship between two data items.

Question 10

Check Digit Verification

Answer 10

data entry devices perform by using the first 9 digits to calculate the 10th digit each time an ID number is entered.

Question 11

Sequence Check

Answer 11

tests whether a batch of input data is int he proper numerical or alphabetical sequence.

Question 12

Batch totals

Answer 12

summarize important values for a batch of input records.

Question 13

Financial Total

Answer 13

sums a field that contains monetary values, such as dollar amount of all sales for a batch of sales transactions

Question 14

Hash totals

Answer 14

sums a non-financial numeric field, such as the total of the quantity ordered field in a batch of sales transactions

Question 15

record count

Answer 15

the number of records in a batch.

Question 16

Prompting

Answer 16

the system requests each input data item and waits for an acceptable response, ensures that all necessary data are entered.

Question 17

Closed-Loop Verification

Answer 17

checks the accuracy of input data by using it to retrieve and display other related information.

Question 18

Data Matching

Answer 18

two or more items of data must be matched before an action can take place

Question 19

File Labels

Answer 19

neet to be checked to ensure that the correct and most current files are being updated.

Question 20

header record

Answer 20

located at the beginning of each file and contains the file name, expiration date, and other identification data

Question 21

trailer record

Answer 21

located at the end of the file and contains the batch totals calculated during input.

Question 22

Cross-footing balance test

Answer 22

compares the results produced by each method to verify accuracy

Question 23

Zero-balance test

Answer 23

compares the results produced by each methods to verify accuracy = 0

Question 24

Write-protection mechanisms

Answer 24

protect against overwriting or erasing of data files stored on magnetic media

Question 25

Concurrent Update Controls

Answer 25

prevent such errors by locking out one user until the system has finished processing the transaction entered by the other.

Question 26

Fault tolerance

Answer 26

the ability of a system to continue functioning in the event that a particular component fails

Question 27

Redundant arrays of independent drives (RAID)

Answer 27

data is written to multiple disk drives simultaneously. If one disk drive fails, the data can be readily accessed from another

Question 28

Uninterruptible power supply (UPS)

Answer 28

system provides protection in the event of a prolonged power outage, use battery power to enable the system to operate long enough to back up critical data and safely shut down.,

Question 29

Key controls for system downtime

Answer 29

1. preventive maintenance
2. fault tolerance
3. data center location and design
4. training
5. patch management and antivirus software.

Question 30

Key controls to quick and complete recovery and resumption of normal operations

Answer 30

1. backup procedures
2. disaster recovery plan (DRP)
3. Business Continuity Plan (BCP)

Question 31

Recovery Point Objective (RPO)

Answer 31

represents the max amount of data that the organization is willing to potentially lose

Question 32

Recover Time Objective (RTO)

Answer 32

represents the length of time that the organization is willing to attempt to function without its information system

Question 33

Rel-time Mirroring

Answer 33

involves maintaining two copies of the database at two separate data centers at all times and updating both copies in real-time as each transaction occurs.

Question 34

Incremental Backup

Answer 34

involves copying only the data items that have changed since the last PARTIAL back up.

Question 35

Differential Backup

Answer 35

copies all changes made since the last FULL back up. each new file contains the cumulative effects of all activity since the last full back up.

Question 36

Disaster Recovery Plan (DRP)

Answer 36

outlines the procedures to restore an organizations IT function int he vent that its data center is destoyed by a natural disaster or act of terrorism.

Question 37

Cold Site

Answer 37

an empty building that is prewired for necessary telephone and internet access, plus a contract with oen or more vendors to provide all necessary equipment within a specified period fo time.

Question 38

Hot site

Answer 38

A facility that is not only prewired for telephone and internet access but also contains all the computing and office equipment the organization needs to perform its essential business activities.

Question 39

Business Continuity Plan (BCP)

Answer 39

specifies how to resume not only IT operations, but all business processes, including relocating to anew office and hiring temporary replacements, in the event that a major calamity destroys not only an organization’s data center but also its main headquarters.

Question 40

Key components of effective disaster recover and business continuity plans:

Answer 40

1. Data backup procedures
2. Procedures for access to replacement infrastructure
3. through documentation
4. periodic testing and training
5. adequate insurance.

Question 41

Backup

Answer 41

an exact copy of the most current version of a database. Intended for use in the event of a hardware or software failure.

Question 42

Restoration

Answer 42

the process of installing the backup copy for use

Question 43

Archive

Answer 43

a 100% copy of a database, master file, or software. Retained indefinitely. Often matches reporting period/ fiscal year.