7. Info Tech Flashcards
Transaction Processing (types)
Batch- delay
Online Real =Time (OLTP)- immediate
Network Types (configurations)
LAN- Local , few computers, close proximity
WAN- Wide, through satellite/phone lines (ex internet)
VAN- Value added, directly connected with customer/supplier, most security but costly
Topology (how network is connected/layout)
Bus- communication bus, common path/channel Star- server out to other computers Ring- go around ring Tree- bunches of stars Mesh- all interconnected, indiv to indiv
Intranet vs Extranet
Intra- internal, enclosed system
Extranet- connected outside
Which system assists with non routine decisions, serves strategic levels of the organization, and helps answers questions about competition, as well as identifies new acquisitions that’ll help in cyclical busin swings?
- Executive support system
- Decision support system
- Management information system
-Executive support system
Wrongs explained-
Decision support: data, models
MIS: collecting data
Which transaction processing mode provides the most accurate and complete info for decision making?
- Batch
- Distributed
- Online
- Application
Online
Online real time, remember! Immediate
Electronic Data Interchange (EDI)
Type of Value added network (VAN) that automatically places order when inventory drops below set point. For just in time, ideally
Data Sizes
Bit, Byte, Character, Field, Record, File, database
Group of… equals next
Which refers to the collection of data for all vendors in a relational database?
- Record
- Field
- File
- Byte
-File ALL vendors (so field or file), but collection of data not a specific identifier/column. So all info aka file
EDI vs other E-Commerce?
- Cost of EDI using a VAN is less than using the internet
- EDI transactions are formatted with strict standards that are agreed upon worldwide
- EDI commerce is conducted without legally binding contracts between partners
- Software maintenance is unnecessary because translation software doesn’t need updating
-EDI transactions are formatted with strict standards that are agreed upon worldwide
Any of these can protect from unauthorized intruders on the internet except:
- Password management
- Data encryption
- Digital certificates
- Batch processing
-Batch processing
EXCEPT!! Nothing to do with intruders/protection
IT Staff
Authorizing (set up system):
Systems Analyst- finds company needs for IT
Application prgrmr- write/test/debug prgrm
Database admin- info holder
Operations:
Data control Clerk- recording
Librarian- safeguard files
Data Input tests
Check digit- see if its correct input for single digit
Validity check- make sure correct #
Edit test- using # not letters and vice versa
Limit test- not exceeding amt of characters
Record/Financial totals- totals batch to add to correct preset total
Hash- meaningless total except to make sure everything got in
Parity check- dummy bit as a check to make sure its not invalid
Which is a processing/input control designed to ensure reliable, accurate data processing? (I, II, neither, both)
I. Limit Test
II. Validity check test
BOTH
I. Limit Test
II. Validity check test
What IT responsibilities need to be given to different people?
- Network maintenance, wireless access
- Data entry, antivirus management
- Data entry, application programming
- Data entry, quality assurance
-Data entry, application programming
Authorizing and recording violation of ARCCS
