_______ filters the document stream to allow only matching documents to pass unmodified into the next pipeline stage.
A. $regex
B. $reg
C. $match
D. None of the mentioned
Answer:A
_______ filters the document stream to allow only matching documents to pass unmodified into the next pipeline stage.
A. $regex B. $reg C. $match D. None of the mentioned
Explanation:$match uses standard MongoDB queries. For each input document, outputs either one document (a match) or zero documents (no match). 2. Point out the wrong statement :