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31.This ensures that the correct and most current files are being updated.

a)Cross-footing balance test

b)Data matching

c)File labels

d)Write-protect mechanism

32.These find processing errors.

a)Cross-footing balance test

b)File labels

c)Recalculation of batch totals

d)Write-protect mechanisms

33.This compares the results produced by more than one method to verify accuracy.

a)Concurrent update control

b)Cross-footing balance test

c)Data matching

d)Recalculation of batch totals

34.This protects records from errors that occur when two or more users attempt to update the same record simultaneously.

a)Concurrent update controls

b)Cross-footing balance test

c)Data conversion controls

d)Recalculation of batch totals

35.The system and the receiving unit calculate a summary statistic and compare it.

a)Echo check

b)Numbered batches

c)Parity check

d)Trailer record

36.This entails verifying that the proper number of bits are set to the value 1 in each character received.

a)Echo check

b)Numbered batches

c)Parity check

d)Trailer record

37.Concerning availability, which of the following statements is true?

a)Human error does not threaten system availability.

b)Proper controls can maximize the risk of threats causing significant system downtime.

c)Threats to system availability can be completely eliminated.

d)Threats to system availability include hardware and software failures as well as natural and man-made disasters.

38.This enables a system to continue functioning in the event that a particular component fails,

a)Backup procedures

b)Fault tolerance

c)Preventive maintenance

d)None of the above

39.Every organization should have a disaster recovery plan so that data processing capacity can be restored as smoothly and quickly as possible.  Which item below would not typically be part of an adequate disaster recovery plan?

a)a system upgrade due to operating system software changes

b)uninterruptible power systems installed for key system components

c)scheduled electronic vaulting of files

d)backup computer and telecommunication facilities

40.________ involves copying only the data items that have changed since the last backup.

a)Archive

b)Backup

c)Differential backup

d)Incremental backup

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