Curriculum Memory defer and errdefer exercise 1 · mcq
defer and errdefer
TypeScript reaches for try { ... } finally { ... } for
guaranteed cleanup. Zig uses defer — placed at the point of
acquisition, runs when the enclosing block exits. Pick the
right Zig translation.
TypeScript reference
About this theme
defer is Zig's structural cleanup tool: each defer statement runs when the enclosing block exits, in LIFO order. errdefer is the same idea, but it only fires when the function returns via an error path. The canonical pattern is alloc-then-defer-free (always run cleanup) or alloc-then-errdefer-free (only on the error path, so successful returns hand ownership to the caller). Once these two land in your fingertips, manual memory management stops being scary.