The author of the textbook has deliberately omitted the following topics $($check all that apply; hint: $5)$:

Question $2$ options:

Type systems and type inference

A prototype$-$based object$-$oriented language

Garbage collection

Lambda calculus

Abstract syntax and operational semantics

Logic programming

A pure, lazy language

Concurrency and parallelism

A pure object$-$oriented language

Symbolic computing and functional programming