If you have created a compound index on (A,B, C) which of the following access pattern will not be able to utilize the index?

Which of the following is a valid insert statement in mongodb? Select all valid.

What tool do you use if you want to extract a CSV from mongo?

What is the replication factor for a replicated cluster with 1 primary, 3 secondaries with one of them hidden. The set also has an arbiter?

Which of the following index would be optimum for the query?

Select all valid. db.test.find( { a : 5, c : 2 })

Using an arbiter allows one to easily ensure an odd number of voters in replica sets. Why is this important?

The oplog (operations log) is a special capped collection that keeps a rolling record of all operations that modify the data stored in your databases. All the replica set members contain a copy of the oplog in the following collection:

In order to ensure that you can maintain high availability in the face of server failure, you should implement which of the following?

What is the equivalent command in MongoDB for the following SQL query?

SELECT * FROM posts WHERE author like "%john%"

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?

If the value of totalKeysExamined is 30000 and the value of totalDocsExamined is 0, which of the following option is correct?

In a replica set, a_________number of members ensures that the replica set is always able to select a primary.

In a replicated cluster, which of the following node would only be used during an election?

Which of the following operator can be used to control the number of items of an array that a query returns?

Which type of indexes does MongoDB support?

You are in a sharded cluster. What will you do prior to initiating backup in sharded cluster?

Which is the correct order (lowest to highest) in which MongoDB compares the BSON types?

Which mongodb tools allow us to work with our data in a human readable format?

In a sharded replica set environment, the w Option provides ability for write concern and j Option provides ability for the data to be written on disk journal. Consider that we have a seven member replica set and we want to assure that the writes are committed to journal. What should be the value of j?