MongoDB C100DBA Exam - Topic 3 Question 128 Discussion

Actual exam question for MongoDB's C100DBA exam

Question #: 128
Topic #: 3

Consider the following document from the products collection:

What does the following query using $elemMatch return? db.products.find( { product_code: "345678" }, { variations: { $elemMatch: { size: ^L^ } } } )

AReturns the complete document but retrieves only the size field from the array

BReturns the document but with only one element in the variations array (corresponding to size L)

CReturns the complete document since MongoDB does not support partial array retrieval

DReturns the complete document but retrieves only the size field from the array and also with only one element in the variations array (corresponding to size L)

Show Suggested Answer

Suggested Answer: B

by Sherly at May 14, 2026, 12:07 PM

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