Is she a cute girl?

Literal

She [topic-は] cute girl is [question-か]?

A bare polite question with the question particle か at the end. Note that か is required for unambiguous questioning in polite (~です) speech — without it, ですか becomes a flat statement. In casual speech, rising intonation alone (without か) often signals a question, but in polite register the か stays. かわいい ('cute') is the cultural keystone of かわいい aesthetics, an internationally recognized Japanese cultural export covering everything from Hello Kitty to anime to fashion to mascots — but in everyday Japanese it's also just the workhorse adjective for 'cute, sweet, charming, endearing.'