Explanation:$unwind operator allows for somewhat similar functionality like join, but with fields embedded within the document. 5. Point out the wrong statement :
A. CURRENT references the start of the field path being processed in the aggregation pipeline stage
B. All stages start with CURRENT the same as ROOT
C. DESCENDING is one of the allowed results of a $let expression
D. None of the mentioned
Answer:A
Explanation:$unwind operator allows for somewhat similar functionality like join, but with fields embedded within the document. 5. Point out the wrong statement :
A. CURRENT references the start of the field path being processed in the aggregation pipeline stage B. All stages start with CURRENT the same as ROOT C. DESCENDING is one of the allowed results of a $let expression D. None of the mentioned
Explanation:However, since $ is equivalent to $$CURRENT., rebinding CURRENT changes the meaning of $ accesses. 6. ________ limits the number of documents in result set