C100DBA Exam Dumps - MongoDB Certified DBA Associate Questions and Answers

Providing these parameters in any order does not impact the performance

$sort moves before $match

MongoDB does not do any movements by default and will use the order provided

$match moves before $sort

Start the election process for primary

Vote for the first secondary so that it would become the next primary

Vote for itself and then call for election

Connect to primary to confirm its availability

netLatency

secondaryPreferred

nearest

primaryPreferred

initializeUnorderedBulk

initializeUnorderedBulkOp

initializeBulk

initializeBulkOp

Fetches the posts with likes between 100 and 200 and sets their _id as null

Groups the posts by number of likes (101, 102, 103.) by adding 1 every time

Calculates the number of posts with likes between 100 and 200

Fetches the posts with likes between 100 and 200, sets the _id of the first document as null and then increments it 1 every time

mongos

mongo shell

individual language drivers

mongod

7

2

1

0

Creating a sharded key automatically creates an index on the collection using that key

We cannot change a shard key directly/automatically once it is set up

A sharded environment does not support sorting functionality since the documents lie on various mongod instances

Sharding is enabled at the database level