INFOS 2

Question 1

what does an AIS consist of?

Answer 1

• people who use it
• processes
• tech
• data, transaction stream files, databases
• controls to safeguard info

Question 2

six criteria tested as part of processing integrity?

Answer 2

• procedures
• system inputs and outputs
• data is processed, stored, maintained
• modification of data is auth and processed

must be CAT to meet requirements and commitments

Question 3

types of PI controls

Answer 3

• input/output
• data entry
• processing
• data transmission
• data integrity
• availability

Question 4

input controls?

Answer 4

• turnaround documents and forms designed (sequentially numbered source docs)

Question 5

data entry controls?

Answer 5

• check fields, signs, limits, range, sizes, completeness, validity, reasonableness
• check digit verification
• batch processing - check sequence, and batch totals
• closed loop verification (use data to check other related info)

Question 6

processing controls?

Answer 6

• datasets must match and will disregard duplicates
• label files for easy ID
• compare totals before and after processing
• calculate totals in diff ways to see if they end up the same
• eliminate poss of overwriting, erasing data
• reconciliation

Question 7

what is a concurrent update?

Answer 7

locking fields/records when theyre being updated so that multiple users arent updating them the same time

Question 8

data transmission controls?

Answer 8

• checksums

- parity checking

Question 9

what is parity checking?

Answer 9

bit added to each character transmitted so they can be verified for accuracy depending on system parity mode

Question 10

what is a checksum?

Answer 10

a value computed from a data packet to check its integrity. the checksum field is added to the header to crosscheck data and checksum

Question 11

what is the IP header checksum?

Answer 11

is calculated over IP header only so that data generally follows it

Question 12

what is the complement of a binary number?

Answer 12

the inverse

Question 13

data coding checks?

Answer 13

self checking codes which combat transposition errors

Question 14

run-to-run?

Answer 14

the purpose is to ensure no records are lost, unprocessed/processed more than once for each of the computer runs that the record must flow through.

Question 15

data integrity controls?

Answer 15

• referential integrity (ensures integrity of master files by identifying anomolies)

Question 16

output controls?

Answer 16

• user review of output
• data transmission controls
• recons

Question 17

availability controls?

Answer 17

• preventative maintenance
• fault tolerance
• data centre location and design
• patch mgmt and antivirus software
• back-procedures (incremental (last update only) or differential (copies all changes since last full backup)
• disaster recovery plan
• business continuity plan