Question

T or F: If the field does not resolve to an array and isn't empty (for example, is a string field), $unwind ignores the input.

Answer 1

True (Option A) is the correct answer. If the field does not resolve to an array and isn't empty, $unwind ignores the input.

Step-by-step explanation:

$unwind Operator:

In MongoDB's aggregation framework, the $unwind operator is used to deconstruct arrays, creating a separate document for each element in the array.

Behavior with Non-Arrays:

If the field specified in $unwind does not resolve to an array or is empty, the operator gracefully ignores the input, allowing the aggregation pipeline to continue without causing errors.

Handling Non-Array Fields:

$unwind is designed to work seamlessly with arrays, and when applied to a field that is not an array, it gracefully skips the operation, ensuring that it doesn't interfere with non-array data.

Option A is the correct answer as it accurately reflects the behavior of $unwind with non-array fields.