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App Router boundaries, typing strategies, server data fetching, edge/runtime trade-offs, and production analytics concerns.
Generics, utility types, narrowing with discriminated unions, and module resolution concepts. Includes single-select and multi-select items.
Syntax layering on JavaScript: types, interfaces, narrowing, and tooling basics. Mix of single-answer and multiple-answer items; multi-select questions ask you to select every correct statement.
Conditional types, infer, variance, template literal types, and soundness edges. Demanding single- and multi-select items.
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