Information System Flashcards
What is an Information system?
collects and processes data into information that is provided to users for use in strategic planning, decision making, performance monitoring, and production
A computer system comprises four key components:
Input devices
Output devices
CPU
Storage
What is an Intranet?
a system that looks and feels like the internet but is
only available to employees
What are some distinctive input devices?
Magnetic ink character recognition (MICR) - used in banks
Optical mark reading (OMR) - used to check mcqs or check boxes
Scanners and optical character recognition (OCR)
Voice date entry (VDE)
Barcodes and QR (quick response)
electronic point of sale (EPOS)
what is a system?
a set of linking components that operate together to accomplish a purpose
what is a Business system?
a collection of people, machines and methods organised to accomplish a set of specific
functions
what is a Information system
all systems and procedures involved in the collection, storage, production and distribution of information
what is Information technology?
the equipment used to capture, store, transmit and present information
what is Information management?
planning, the environment, control and technology
The main difference between an open-loop system and a closed-loop system is?
the closed-loop system has the ability to self-correct while the open-loop system doesn’t.
What are 3 examples of an open loop system?
Washing Machine.
Electric Bulb.
TV Remote Control.
What are 3 examples of an closed loop system?
Automatic Electric Iron
An Air Conditioner
Water Level Controller
What are 6 key elements of Information system?
Data Database Database Management System – DBMS Networks Integration Security and Privacy
Big size companies use very large databases called?
data warehouses and data marts.
Whar is DBMS abberviation?
a software called a database management system
4 main types of DBMS are?
· Hierarchical database
· Network database
· Relational database
· Object-Oriented database
what is centralised system?
all work done on a single centeral computer.
what is Decentralised system?
work is spread throughtout tthe organization in different locations
What are 2 disadvantages of Real-time/stream processing?
expensive
increased hardware capacity
What are 2 advantages of Real-time/stream processing?
Information is quickly updated
ability for the data to be online
What are 3 disadvantages of Batch processing?
Often delays
Management information is often incomplete due to out of date data.
Often master files kept off line therefore access may not always be available
What are 3 advantages of Batch processing?
Easy to develop
cheaper, less hardware required
Less processing power
Example of batch processing?
its like writing all order at once, instead of writing them individually when they take place (stream processing)
____ automate routine and tedious back-office processes such as accounting, order processing, and financial reporting?
Transaction Processing System (TPS)
What are 6 types of Information system?
· Transaction Processing System (TPS) · Management Support System (MSS) · Decision Support System (DSS) · Executive Information System (EIS) · Expert System (ES) · Office automation systems
What are disadvantages of an integrated system?
one system fails and all gone
more errors and complex
more expensive
require greater support
What are advantages of an integrated system?
offers complete view
better decisions will be made
more effiencient
greater customer satisfactions and profitability
3 Features of VPN?
provide security
cost effective
What are 5 features of WAN?
lower speed
collective owners
higher setup cost
higher transmission errors
3 forms of WANs are?
intranets,
virtual private networks (VPN),
extranets.
What are 5 features of LAN?
Higher speed owned by single owner or organzation low cost maintanence low transmission errors 2 lans can connected via telephone and radio waves
What is LAN?
abbreviated from Local Area Network, is a network that covers a small geographical area such as homes, offices, and groups of buildings
What is WAN?
abbreviated from Wide Area Network, is a network that covers larger geographical areas that can span the globe
