Mongodb udemy selected C100dba Mongodb Certified Dba Associate Questions Answers by Peggy q53 vce pdf

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Exam Name:	MongoDB Associate Database Administrator(Based on MongoDB 6.0 and 7.0+)
Exam Code:	C100DBA Dumps
Vendor:	MongoDB	Certification:	MongoDB Certified DBA Associate
Questions:	172 Q&A's	Shared By:	peggy

Question 36

Which of the documents below will be retrieved by the following query? Assume the documents are stored in a collection called " sample " . Check all that apply.

db.sample.find( { " $or " : [ { " a " : { " $in " : [ 3, 10] > }, { " b " : { " $lt " : 2 > > ] > )

Options:

{ ' ' __id " :3, " a " : 4, " c " :0, " b " :14}

{ ' ' _Jd " :7, " a " : 8, " c " :1, " b " :7}

{ " .Jd " :6, " a " : 1, " c " :1, " b " :5}

{ ' ' \Jd " :9, " a " : 17, " c " : 1, " b " : 1}

{ \Jd " :10, " a " : 3, " c " : 1, " b " : 1}

{ " .Jd " :: 2, " a " : 2, " c " :: 0, " b " : 1}

{ " .Jd " :: 4, " a " : 5, " c " :: 0, " b " : 17}

Discussion

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Question 37

Given the following query:

db.load.find({

_id: { $lte: 1000 },

rnd: 1234,

date: { $gte: ISODate( " 2023-01-01 " ) }

}).sort({ date: -1 })

In a compound index that best supports this query, what field should be first field?

Options:

no field

rnd: 1

_id: 1

date: 1

Discussion

Question 38

What read preference should your application use if you want to read from the primary under normal circumstances but allow reads from secondaries when a primary is unavailable?

Options:

secondaryPreferred

Secondary

nearest

primary

primaryPreferred

Discussion

Question 39

Consider that you have a collection called population which has fields state and city. Which of the following query will calculate the population grouped by state and city?

Options:

db.population.aggregate( [{ $group: { _id: { state: " $state " , city; " $city " },pop: { $sum: 1 > > > ] )

db.population.aggregate( [{ $group: { _id: { state: Estate " , city: " $city " },pop: { $pop: 1 } } }] )

db.population.aggregate( [{ $group: { _id: { state: Estate " , city: n$city " },pop: { $sum: " $pop " } } }] )

db.population.aggregate( [{ $group: { _id: { city: " $city " },pop: { $sum: " $pop " } } }] )Multi Document Transaction is not supported by MongoDB

Discussion

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2026-09-10