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NO.24 What is the output of following two commands in MongoDB: db. posts. insert({n_id”:l}) db.posts.insert({“_id”:l})

NO.25 What is the first task that a secondary would perform on being prompted by another secondary for an election?

NO.26 Which of the following needs to be performed prior to initiate backup on a sharded cluster?

NO.27 Which of the following index would be optimum for the query?
Select all valid. db.test.find( { a : 5, c : 2 })

NO.28 Mongodb does provide high availability via which option?

NO.29 Consider that our posts collection contains an array field called tags that contains tags that the user enters. {

Which of the following commands will find all the posts that have been tagged as tutorial.

NO.30 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?

NO.31 In a sharded cluster, from which node does one stop the balancer process before initiating backup?

NO.32 Which of the following commands will return all the posts with number of likes greater than 100 and less than
200, both inclusive?

NO.33 Consider a collection posts which has fields: Jd, post_text, post_author, post_timestamp, post_tags etc. Which of the following query retrieves ONLY the key named post_text from the first document retrieved?

NO.34 Which of the following aggregation commands in MongoDB does not support sharded collections?

NO.35 Aggregation Pipelines have a limit of:

NO.36 What tool would you use if you want to save a gif file in mongo?

NO.37 Which of the following operator can be used to limit the number of documents in an array field of a document after an update is performed?

NO.38 Which of the following aggregate commands in MongoDB uses a pipeline approach with the goals of improving the aggregation performance?

NO.39 Which option should be used to update all the documents with the specified condition in the MongoDB query?

NO.40 Consider the following posts document:

Which of the following queries will return the documents but with only the first two tags in the tags array?

NO.41 Given a collection posts as shown below having a document array comments, which of the following command will create an index on the comment author descending?

NO.42 We can insert multiple documents in bulk using which of the following operations:

NO.43 What tool do you use if you want to extract a CSV from mongo?

NO.44 JSON stands for

NO.45 In a replicated cluster, which of the following node would only be used during an election?

NO.46 What is the output of the following program?

NO.47 Which is the default mode in which the explain() command runs?