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MongoDB C100DBA Certification Exam is a widely recognized and respected certification for professionals seeking to validate their expertise and knowledge in MongoDB database administration. C100DBA exam is designed to test the skills and abilities of candidates in various aspects of MongoDB 4.4 database administration, including installation and configuration, performance tuning and optimization, security, backup and recovery, and monitoring and maintenance.

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MongoDB C100DBA Exam is an associate-level exam, which means it is intended for individuals who have some experience with MongoDB and are looking to validate their skills and knowledge. C100DBA exam consists of 60 multiple-choice questions and has a time limit of 90 minutes. The questions cover a range of topics related to MongoDB administration, including installation, configuration, performance tuning, backup and recovery, security, and more.

MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Sample Questions (Q58-Q63):

NEW QUESTION # 58
To add a new user and enable authentication in MongoDB, which of the following steps need be executed?

A. update users collection and run db.enableAuthenticationQ
B. update users collection and restart mongodb with -auth option
C. All of the above
D. update users collection and restart mongodb

Answer: B

NEW QUESTION # 59
In which of the following scenarios is sharding not the correct option. Select all that apply.

A. The working set in the collection is expected to grow very large in size
B. The write operations on the collection are very high
C. The collection is a read intensive collection with less working set
D. The write operations on the collection are low

Answer: C,D

NEW QUESTION # 60
Consider a collection posts which has fields: Jd, post_text, post_author, post_timestamp, post_tags etc.
Which of the following query retrieves ONLY the key named post_text from the first document retrieved?

A. db.posts.findOne({post_text: 1})
B. db.posts.find({},{_id:Of post_text:1})
C. db.posts.finOne({},{_id:0, post_text:1})
D. db.posts.finOne({},{post_text:1})

Answer: C

NEW QUESTION # 61
Below is a sample document of "orders" collection

Answer:

Explanation:
$project

NEW QUESTION # 62
Which TWO commands can be used to remove the role, " specialRole " from " user1 " ?

A. db.revokeRolesFromUser( " user1 " , [{ role: " specialRole " , db: " myDB " }])
B. db.revokeRolesFromUser( " user1 " , [{ " myDB " : " specialRole " }])
C. db.revokeRolesFromUser( " user1 " , [ " specialRole " ])
D. db.revokeRoleFromUser({ user: " user1 " , role: " specialRole " })
E. db.revokeRoleFromUser( " user1 " , " specialRole " )

Answer: A,C

Explanation:
The documented mongosh helper is db.revokeRolesFromUser(), and its second argument is an array of roles to revoke. MongoDB permits each role in that array to be expressed either as an explicit document { role: < roleName > , db: < database > } or, when the role belongs to the database in which the command is run, as a simple role-name string. Option C uses the explicit role-document form and is therefore valid for a role named specialRole defined in myDB. Option E uses the shorthand string form and is valid when specialRole is in the current database context. Option A reverses the required document structure and does not supply the mandatory role and db keys. Options B and D use a singular helper, db.revokeRoleFromUser(), which is not the documented MongoDB method. The plural method name reflects that multiple roles can be revoked in a single operation. Administrators should also remember that revoking a directly assigned role does not necessarily remove privileges inherited through other roles. Among the choices, C and E are the syntactically valid revocation forms.
Study Guide reference/topic:Security, Networking, and Encryption - RBAC, user administration, and revokeRolesFromUser().

NEW QUESTION # 63
......

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