Master MongoDB C100DBA Exam with Reliable Practice Questions
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Consider that the posts collection contains an array called ratings which contains ratings given to the post by various users in the following format:
Which of the following query will return all the documents where the ratings array contains elements that in some combination satisfy the query conditions?
Correct : D
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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?
Correct : E
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Given a replica set with five data-bearing members, suppose the primary goes down with operations in its oplog that have been copied from the primary to only one secondary. Assuming no other problems occur, which of the following describes what is most likely to happen?
Correct : B
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You have the following index on the toys collection:
{
"manufacturer" : 1,
"name" : 1,
"date" : -1
}
Which of the following is able to use the index for the query? Check all that apply.
Correct : A, B, C
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Which of the following is true of the mechanics of replication in MongoDB? Check all that apply.
Correct : C
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