What does this idiom mean "to ace something"?

[Ida]

English Idioms and Expressions, Advanced Level

ESL/EFL Test #27 "American Slang Words (1)", question 1

I feel really good about this class. I'm going to ace the exam tomorrow.

(a) fail
(b) do well or excel in
(c) play cards during

English Idioms and Expressions, Advanced Level

ESL/EFL Test #27 "American Slang Words (1)", answer 1

I feel really good about this class. I'm going to do well or excel in the exam tomorrow.

Correct answer: (b) do well or excel in
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what is the main idea?

Ida

[Mister Micawber]

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This is a vocabulary/idiom question. The idea is that 'to ace [a test. etc]' means 'to do well; to excel' in it.
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Native English teacher at Mister Micawber's

[Yankee]

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The expression "to ace an exam/a test" also suggests that you will receive an 'A' (i.e. the best/highest grade).
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