Page 286 - CISSO_Prep_ Guide

• Operations and maintenance = change
control & updates, enhancements.
• Decommissioning = transitioning to
something better.
• SLC is different than SDLC (system development
life cycle) in that SDLC does not include
anything past turnover to production.
Programming Languages
• 1GL – machine language (machine-oriented
binary code that is hardware-specific).
• 2GL – assembly language (human-readable,
hardware-specific).
• 3GL – high-level language (machine-
independent, C, C++).
• 4GL – very high-level language (application-
specific, SQL, macros).
• 5GL – natural language (typing/speaking and
have the system perform).
• Assembler = translates assembly to
machine.
• Compiler = translates high-level into
machine language (note: machine language,
not assembly).
• Interpreter = translates instruction-by-
instruction for testing. Interpreted
languages are platform-independent.

Object-Oriented Programming
• Classes = how to make objects (like
recipes).
• Objects = instance of the class.