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NEW QUESTION # 61
What command is used to grant a role " customRole1 " to an existing user called " user1 " ?
Answer: B
Explanation:
MongoDB provides db.grantRolesToUser() specifically for assigning one or more additional roles to an existing user. The method takes the username as its first argument and an array of roles as its second argument, so db.grantRolesToUser( " user1 " , [ " customRole1 " ]) is the correct choice. A role can be supplied as a simple string when it belongs to the current database or as an explicit document such as { role: " customRole1 " , db: " admin " } when the database context must be specified. Option B uses db.createUser(), which is used to create a new user rather than modify the role membership of an account that already exists.
Options A and C use method names that are not the documented mongosh interfaces for this operation.
Administrators should also distinguish grantRolesToUser() from grantRolesToRole(): the latter makes a user- defined role inherit other roles, whereas the former directly changes a user ' s assigned roles. Least-privilege practice requires granting only roles necessary for the user ' s responsibilities. For the requested update to the existing user, option D is correct.
Study Guide reference/topic:Security, Networking, and Encryption - user administration, role assignment, RBAC, and grantRolesToUser().
NEW QUESTION # 62
What tool do you use to see if you have a problem in the consumption of disk I / 0?
Answer:
Explanation:
Mongoperf
NEW QUESTION # 63
The MongoDB explain() method does not support which of the following verbosity mode:
Answer: D
NEW QUESTION # 64
Which of the following needs to be performed prior to initiate backup on a sharded cluster?
Answer: B
NEW QUESTION # 65
What does the totalCreated field mean in the output of the db.serverStatus().connections command?
> db.serverStatus().connections
{
" current " : 4,
" available " : 51196,
" totalCreated " : 5,
" active " : 2,
" threaded " : 4,
" exhaustIsMaster " : 1,
" exhaustHello " : 0,
" awaitingTopologyChanges " : 1
}
Answer: A
Explanation:
connections.totalCreated is a cumulative count of incoming connections created during the lifetime of the running MongoDB server process. It includes connections that are still open as well as connections that have already closed. That is why the example can show totalCreated: 5 while current: 4: five connections have been created since the process started, but only four remain current. Option A is incorrect because the counter is not limited to closed connections. Option C corresponds more closely to connections.current, which reports presently existing incoming client connections. Option B is imprecise because "since the server was set up" could imply the lifetime of the installation or deployment across restarts, whereas server-status counters generally reflect the current process lifetime. Tracking totalCreated alongside current, active, and connection- pool behavior helps administrators identify excessive connection churn, poorly configured client pools, or bursts of new connections. The most accurate interpretation among the choices is therefore the number of connections created since the server process was started, making D correct.
Study Guide reference/topic:Performance Monitoring and Tuning - serverStatus, connection metrics, and cumulative connection counters.
NEW QUESTION # 66
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