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Understanding template declaration keywords in C++

This is an easy C++ language-knowledge question that tests familiarity with template syntax at a level Google and other large tech firms expect from candidates. It probes whether you understand the subtle interchangeability of certain keywords in template contexts and can reason about their semantic equivalence.

The question centers on the dual role of certain keywords in template declarations. Rather than rote memorization, it rewards understanding when and why these keywords are equivalent, and how modern C++ standards have shaped their usage. You should be able to explain not just what works, but why it works, and any nuanced differences in how compilers interpret them.

• Template parameter declaration syntax
• Keyword equivalence in template contexts
• Scope and visibility of template parameters