1.Language

Allocation and initialization differences between new and make.

Runtime type/value inspection, settable values, interfaces, tags, and reflection trade-offs.

Explicit error returns, wrapping, classification, inspection, and preserving operational context.

Implicit interface satisfaction, dynamic type/value pairs, nil subtleties, and API design.

First-class functions, multiple returns, closures, methods, variadics, and value semantics.

Immutable byte sequences, UTF-8 conventions, runes, indexing, conversion, and allocation.

Hash maps, zero-value reads, mutation, iteration, concurrency rules, and implementation-sensitive internals.

Low-level pointer/layout operations, guarantees, portability risks, and containment strategies.

Panic unwinding, deferred cleanup, recovery boundaries, and when not to use panic.

Defined and alias types, interfaces, method sets, assignability, conversion, generics, and zero values.

Fixed-length value types, copying semantics, indexing, iteration, and their relationship to slices.

Slice descriptors, backing arrays, append/capacity, sharing, copying, and retention pitfalls.

Deferred calls, LIFO execution, argument evaluation, return interaction, and practical cleanup patterns.