Which are the ONLY ways to project portions of an array?

The correct answer is C. All of the above. All three MongoDB array projection operators - $slice, $ (positional), and $elemMatch - are recognized methods for projecting specific portions of an array, so "All of the above" is the only complete and correct answer. Selecting only A ($slice) is insufficient because it…

MongoDB Fundamentals

Question

Options

A$slice
B$
CAll of the above
D$ elemMatch

How the community answered

(28 responses)

A
4% (1)
B
4% (1)
C
86% (24)
D
7% (2)

Explanation

All three MongoDB array projection operators - $slice, $ (positional), and $elemMatch - are recognized methods for projecting specific portions of an array, so "All of the above" is the only complete and correct answer. Selecting only A ($slice) is insufficient because it merely limits elements by count or offset, leaving out condition-based projection tools. Selecting only B ($) is incomplete because the positional operator only returns the first element matched by the query predicate, not the full set of array projection methods. Selecting only D ($elemMatch) misses the broader picture, since it projects the first element matching a condition specified in the projection stage rather than the query stage. Memory tip: Think of the acronym SPE - Slice, Positional ($), ElemMatch - these three are MongoDB's complete toolkit for projecting array subsets, and exam questions love testing whether you know all three rather than just one.

Topics

#array projection#$slice#$elemMatch#query operators

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