Question 61 : ________ applies an expression to each item in an array and returns an array with the applied results.
1. $map
2. $geo
3. $geoRear
4. None of the mentioned
View Answer   Discuss with Members

Question 62 : ______ binds variables for use in the specified expression.
1. $skip
2. $let
3. $bind
4. None of the mentioned
View Answer   Discuss with Members

Question 63 : Point out the wrong statement:
1. Literals can be of any type
2. CURRENT cannot be rebound
3. MongoDB parses string literals that start with a dollar sign $
4. None of the mentioned
View Answer   Discuss with Members

Question 64 : Which of the following statement is equivalent to “$$CURRENT.“?
1. “$%”
2. “%”
3. “$$”
4. “$”
View Answer   Discuss with Members

Question 65 : Aggregation expressions use ______ path to access fields in the input documents.
1. mpath
2. dbpath
3. lpath
4. field
View Answer   Discuss with Members

Question 66 : Point out the correct statement :
1. To access variables in expressions, use a string that prefixes the variable name with $$$
2. Expressions can include field paths and system variables, literals, expression objects, and expression operators
3. To specify a field path, use a string that prefixes with a dollar sign % the field name or the dotted field name
4. All of the mentioned
View Answer   Discuss with Members

Question 67 : Which of the following stages cannot appear multiple times in a pipeline ?
1. $regex
2. $reg
3. $match
4. $out
View Answer   Discuss with Members

Question 68 : Which of the following operator is related to geography of data ?
1. $geoSpatial
2. $geoNear
3. $geoRear
4. None of the mentioned
View Answer   Discuss with Members

Question 69 : ________ deconstructs an array field from the input documents to output a document for each element.
1. $unwindelem
2. $unwind
3. $unwin
4. None of the mentioned
View Answer   Discuss with Members

Question 70 : _____ Writes the resulting documents of the aggregation pipeline to a collection.
1. $out
2. $in
3. $output
4. None of the mentioned
View Answer   Discuss with Members