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Compsci #7

From 7 [programming languages]

TermDefinition
Early generation language Machine language, Assembly language, Machine dependent language
Machine language Ex. Vole
Machine dependent language The code only works on that machine
Assembly language Mnemonic system for representing machine instructions. Machine-dependent. Converted to machine language by an assembler
Variables/Identifiers Descriptive names for memory locations, chosen by the programmer
Third generation language Uses high-level primitives. Each primitive corresponds to a sequence of machine language instructions. Converted to machine language by the compiler. (Mostly) machine independent. Ex. Fortran, Cobol
High level language abstractions Simple abstractions, Complex abstractions, Esoteric abstractions
Simple abstractions Constants, literals, variables
Complex abstractions Statements, expressions, control
Esoteric abstractions Procedures, modules, libraries
Procedural units Also known as functions
Language implementation The process of converting a program written in a high-level language into a machine-executable form
Lexical Analyzer Recognizes which strings of symbols represent a single entity or token
The parser Groups tokens into statements, using syntax diagrams to make parse trees
The code generator Constructs machine-language instructions to implement the statements
Object Instance of a class. Active program unit containing data and procedures
Class A template from which objects are constructed
Encapsulation Restricting access to the internal components of an object
Inheritance Allows new classes to be defined in terms of previously defined classes
Polymorphism Allows methods to take multiple forms, behaving differently based on the object calling it (relates to overriding)
Created by: jolly_n4
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