Information_Technology Flashcards
What are the duties of a Systems Programmer?
Writes- Updates- Maintains- & Tests software- systems- and compilers
If it is not possible to segregate duties in an IT System- what actions should be taken to compensate for internal control purposes?
Include Computer Logs. Control Group should review the logs.
What are the characteristics of an Expert System (ES)?
Computer uses reasoning structured; No human interpretation needed
An expert system is a computer software decision support system that uses a computer’s ability to make decisions based on input from the user and an expert knowledge database.
What are the characteristics of a Decision Support System (DSS)?
Computer provides data Gives Interactive Support Human interpretation needed
What are the characteristics of an Ad Hoc computer report?
User initiates the report. The report is created upon demand.
When are Exception reports generated?
Exception reports are produced when Edit Tests- Check Digits- or Self-Checking Digits identify a problem
What is End-User Computing?
The User develops and executes their own application.
What is the primary benefit of E-commerce?
E-commerce makes business transactions easier.
What are the risks of E-commerce?
Compromised data or theft. Less paper trail for auditors.
What is a File Server?
A file server stores shared programs and documents.
What is the purpose of a WAN (Wide Area Network)?
It connects computers that are far apart.
What are the characteristics of a virus?
Takes over a computer Needs a host program to run
What are the characteristics of a computer worm?
Takes over multiple computers Doesn’t need a host program to run
What is the purpose of Automated Equipment Controls?
They prevent and detect hardware errors.
What is RAM?
Random Access Memory. Internal memory in the computer used during immediate processing.
What is a CPU?
Computer Processing Unit It processes commands within a computer.
What is Job Control Language?
It schedules and allocates system resources.
What are examples of input devices?
Keyboard Mouse Scanner Magnetic Ink Reader Magnetic Tape Reader EDI Point of Sale Scanner
What are examples of Output Devices?
Speakers Monitors Printers
What are the characteristics of Magnetic Tape storage?
Sequential Access - Sorts data in order Slower data retrieval Header Label prevents Operator error by loading wrong tape External Labels prevent accidental destruction by operator
What are the characteristics of Magnetic Disks?
Random Access - Finds data in random spots Faster data retrieval Uses Boundary Protection for data
What is a Gateway?
Connects one network to another Note: the Internet is connected by Gateways
What are Parity Checks?
A control that detects internal data errors. A bit is added to each character- it checks to see if a bit was lost.
What is an Echo Check?
Transmitted data is returned to the sender for verification (it echoes back to the sender)
