ETL PRELIMS

Software

Instructions that tells a computer what to do

Punch card

limited distribution and custom software “batch operators”

Doesn’t wear out, Continue to be custom built and Operational, Traditional, Maintenance

Characteristics of Software

User friendly, Efficiency

Operating System

Process management, Input/Output management, Memory management, File management, Network management

Types of Operating Systems

Batch operating system

Is a technique in which an Operating system collects the programs and data together in a batch before processing starts

Time sharing Operating system

Multi tasking Operating system allows the user to perform more than one computer task at a time

Distributed Operating system

Loosely coupled systems software over a collection of independent, networked, communicating, and physically separated computational nodes

Network Operating system

Run on a server and provides the capacity to manage data, users, groups, security, application and other types of networking

Real time Operating system

Intended to serve real time application that process data as it comes in typically without buffer delays

Soft real time systems

missing the requirements (time) degrades the quality

Hard real time systems

missing the requirements (time) is a total failure

Prototype

sample of a model

Prototype

Experimental model to test or validate ideas, design assumptions and other aspects

Prototype

Expresses the product implementation logically or physically

Prototyping

typically simulates only a few aspects

Low Fidelity and High Fidelity

Types of Prototype

Wireframe, Storyboards, Diagrams, Animation

Low fidelity

Interactive UI Mockup, Physical Model, Wizard of OZ prototyping

High fidelity