Discussion
The number of phases in the classical model of a compiler is usually given as
Answer: D
Correct answer: six, spanning lexical analysis through to code generation
The classical model has lexical analysis, syntax analysis, semantic analysis, intermediate code generation, code optimisation and code generation.
The first three are the analysis phase or front end and the last three the synthesis phase or back end, which is the two-part division the third option describes at a coarser grain. Alongside them run the symbol table manager and the error handler, which interact with every phase rather than occupying a position in the sequence.
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