Compilers & Runtimes.

How source text becomes something that runs: the front end that reads it, the passes that rewrite it, and the runtime that executes it and reclaims its memory. Covers 10 sub-skills.

• Compilers & Runtimes · 1 of 3

  Lexical Analysis

  What is the scanner's unit of work?

  AOne whole line at a timeBOne character at a timeCOne function at a timeDOne statement at a time

• Compilers & Runtimes · 2 of 3

  Parsing & ASTs

  Why is a call a node rather than a leaf?

  AIt has no parts under itBIt has parts underneath itCIt has no parts beside itDIt has parts beside it only

• Compilers & Runtimes · 3 of 3

  Semantic Analysis & Types

  Why does moving a check earlier cost something?

  AMore has to be provable without runningBLess has to be provable while it runsCLess has to be provable without running tooDMore has to be provable while running