NO.12 What is the maximum size of Index Key Limit and Number of Indexes per collection?

NO.13 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?

NO.14 Which of the tags in a replica set configuration specify the operations to be read from the node with the least network latency?

NO.15 Which of the following is incorrect statement about find and findOne operations in MongoDB?

NO.16 Which node in a replica set does accept write operation?

NO.17 ‘$set’ sets the value of

NO.18 ‘mongoimport’ command is used for

NO.19 Which of the following commands will return all the posts with number of likes greater than 100 and less than 200, both inclusive?

NO.20 Mongodb does provide high availability via which option?

NO.21 Which of the following does MongoDB use to provide High Scalability?

NO.22 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.23 In a collection that contains 100 post documents, what does the following command do? db. posts.
find().skip(5).limit(5)

NO.24 Which of the following commands finds all the documents in the posts collection with post timestamp field as null?

NO.25 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?

NO.26 In what format does mongodump creates backup files?

NO.27 Which are the ONLY ways to project portions of an array?

NO.28 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.

NO.29 What is the equivalent command in MongoDB for the following SQL query?
SELECT * FROM posts WHERE author like “%john%”