MongoDB Test 2
Which mode does the explain() command operate in by default?
A query plan is a series of steps that are followed to find documents that fit the query. The above plan just contains one stage, 'COLLSCAN,' which suggests MongoDB performed a full collection scan in order to respond to the query.
The master's oplog uses the ____ storage size measure .
The master's oplog uses the MB storage size measure.
The $inc key modifier acts with the _____ data type.
The $inc key modifier acts with the numeric data type.
$push is an array operator that adds a key to an array at the ______.
$push is an array operator that adds a key to an array at the end
Which of the following commands has the potential to lock the database?
All of the above
Which of the following statements concerning sharding is correct?
Data is distributed across numerous machines using the sharding technique. To assist installations with huge data sets and high performance operations, MongoDB uses sharding. Large data collections and high-throughput applications can tax a single server's capabilities.
What is the largest Index Key Limit and Number of Indexes per collection?
The largest index key limit and the number of indexes per collection are 1024 bytes and 64 indexes
What is the maximum document size in MongoDB?
The maximum document size in Mongodb is 16 MB; however, we may store more than 16 MB records in a single document using GridFS, which divides huge documents into numerous chunks. If our document is larger than 16 MB, GridFS will store it in two collections: the first will include the chunks, while the second will contain the metadata.
The mongoimport command is used to do the:
MongoDB Import is a command line utility that is used to import data from a TSV, CSV, or JSON file into MongoDB. MongoDB import is part of the MongoDB tool package, which may be downloaded from the official distribution center.