Breakdown of Który komponent jest bardziej wydajny?
być
to be
który
which, who (relative)
bardziej
more (to a greater degree)
wydajny
efficient
Questions & Answers about Który komponent jest bardziej wydajny?
Why do we use bardziej wydajny here instead of the one-word comparative wydajniejszy?
Both bardziej wydajny and wydajniejszy are grammatically correct and mean the exact same thing. While Polish often prefers the single-word suffix for common adjectives, the two-word analytical form with bardziej (more) is very common in technical contexts, for longer words, or simply for emphasis. You can safely use either here.
Could I use jaki instead of który in this sentence?
Using który implies you are choosing from a specific, limited set of components (e.g., 'Which of these specific components is more efficient?'). If you used jaki, it would sound more like a general question about characteristics, asking what kind or type of component tends to be efficient, rather than selecting a specific one from a group.
Does wydajny translate to all English uses of 'efficient'?
No. Wydajny specifically refers to performance, high yield, or energy efficiency, making it perfect for machines, batteries, or software components. If you mean 'efficient' in the sense of an action being effective or successful at solving a problem, you would use skuteczny. If you mean a person who is efficient and doesn't waste time, you might say they are dobrze zorganizowany.