MISY160 Chapter Notes - Chapter 10: Sql, Query Language, Objective-C

• School: University of Delaware
• Department: Management Information Systems
• Course: MISY160
• Professor: Hartono Edward

Document Summary

Information system: data, people, procedures, hardware, & software to help with planning & decision making. System development life cycle (sdlc): works like a waterfall, each step flows to the next: problem or opportunity id, analysis, design. Data-flow diagrams: trace all data in information system from point data enters the system to its resting place: development, testing & installation, maintenance & evaluation. Scope creep: ever-changing set of requests from clients to add new features when they wait for a working software prototype. Programming: process of translating task into series of commands that computer uses to perform a task. Program development life cycle (pdlc): describe the problem make a plan coding debugging testing and documentation. Problem statement: starting point of programming; description of the tasks the program must accomplish and how the program will execute the tasks. 3 elements: data (input), info (output), and method (process) Error handling: what the program should do if input is invalid.