Q. In _____________ mode, MongoDB returns statistics describing the execution of the winning plan as well as statistics for the other candidate plans captured during plan selection.

View solution

Q. Which of the following parameter specifies the verbosity mode for the explain output?

View solution

Q. If the query planner selects a collection scan, the explain result includes a _________ stage.

View solution

Q. Point out the wrong statement.

View solution

Q. For sharded collections, explain returns the __________ for each accessed shard.

View solution

Q. _________ corresponds to the millis field returned by cursor.explain() in earlier versions of MongoDB.

View solution

Q. Which of the following provides information on the MongoDB instance?

View solution

Q. ____________ does not provide query execution information for the rejected plans.

View solution

Q. By default, db.collection.explain() runs in ___________ verbosity mode.

View solution

Q. ____________ returns information on the query plan for aggregate function.

View solution

Q. Which of the operator is used to access the query field of documents within system.profile?

View solution

Q. MongoDB reports its triggered page faults as the total number of page faults in ________ second.

View solution

Q. You can inspect __________ to check the amount of mapped memory that mongod is using.

View solution

Q. Point out the wrong statement.

View solution

Q. The memory usage statuses metrics of the _________ output can provide insight into MongoDB’s memory use.

View solution

Q. Point out the correct statement.

View solution

Q. With the _______ storage engine, MongoDB uses memory-mapped files to store data.

View solution

Q. MongoDB’s _______ is a database profiling system that can help identify inefficient queries and operations.

View solution

Q. ______ field contains total number of current clients that connect to the database instance.

View solution

Q. serverStatus includes all fields by default, except _________

View solution