Câu 11: C100DEV: MongoDB Associate Developer

Given the following documents in a collection and given a unique index on the n field:{ _id: 1, n: ‘Apple’, p: 0.75, c: ‘Green’ },{ _id: 2, n: ‘Orange’, p: 0.85, c: ‘Orange’, q: 14 },{ _id: 3, n: [1,3,5,7], c: 42 },{ _id: 9, n: Green, c: 42 }What document can successfully be added in the same collection?

1. A. { _id: 4, n: ‘Banana’, p: 0.75, c: ‘Yellow’ } — đáp án hiện tại
2. B. { _id: 5, n: ‘Apple’, p: 0.85, c: ‘Orange’, q: 14 }
3. C. { _id: 3, n: ‘Mango’, c: 42}
4. D. { _id: 2, n: ‘Banana’, p: 0.75, c: ‘Green’ }