get full marks for something—
1. gain the maximum number of marks in a subject:
- Half the students got full marks for what was intended to be an easy question.
2. be praised for some good quality:
- Mr. Jenkins gets full marks for his courage and enterprise.
get full marks in something—(also: score full marks in something) = get full marks for something 1:
- Only one in six adults got full marks in a test of six familiar words.