Free PDF Quiz 2026 MongoDB Unparalleled C100DBA: MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Actual Test Pdf

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MongoDB C100DBA Exam Syllabus Topics:

Section	Objectives
Topic 1: CRUD Operations	- Data Manipulation 1. Delete Operations 2. Read Queries 3. Insert Operations 4. Update Operations
Topic 2: Application Administration	- Security and Access Control 1. Authentication 2. User Management 3. Authorization 4. Role-Based Access Control
Topic 3: Philosophy and Features	- MongoDB Architecture 1. Scalability Concepts 2. Document Model 3. Collections and Databases 4. High Availability Concepts
Topic 4: Replication	- Replica Sets 1. Read Preferences 2. Write Concerns 3. Primary and Secondary Nodes 4. Elections
Topic 5: Indexes	- Index Management 1. Query Performance Optimization 2. Single Field Indexes 3. Index Selection 4. Compound Indexes
Topic 6: Server Administration	- Database Operations 1. Configuration Management 2. Backup and Restore 3. Monitoring 4. Storage Management
Topic 7: Sharding	- Cluster Scaling 1. Query Routing 2. Shard Keys 3. Chunk Distribution 4. Balancer Operations

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Solutions is commented MongoDB to ace your C100DBA preparation and enable you to pass the final MongoDB C100DBA with flying colors. To achieve this objective Exams. Solutions is offering updated, real, and error-Free C100DBA Exam Questions in three easy-to-use and compatible formats. These C100DBA questions formats will help you in preparation.

MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Sample Questions (Q67-Q72):

NEW QUESTION # 67
Which option should be used to update all the documents with the specified condition in the MongoDB query?

A. specify {updateAII: true} as the third parameter of update command
B. updateAII instead of update
C. specify {multi : true} as the third parameter of update command
D. specify {all: true} as the third parameter of update command

Answer: C

NEW QUESTION # 68
What command is used to grant a role " customRole1 " to an existing user called " user1 " ?

A. db.grantRoles( " user1 " , [ " customRole1 " ])
B. db.addRoleToUser( " user1 " , [ " customRole1 " ])
C. db.createUser({ user: " user1 " , pwd: " pwd1 " , roles: [{ role: " customRole1 " , db: " admin " }] })
D. db.grantRolesToUser( " user1 " , [ " customRole1 " ])

Answer: D

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 # 69
Consider that the posts collection contains an array called ratings which contains ratings given to the post by various users in the following format:

Which of the following query will return all the documents where the ratings array contains elements that in some combination satisfy the query conditions?

A. db.inventory.find( { ratings: { $elemMatch: { $gte: 3, $lte: 6 } } } )
B. db.inventory.find( { ratings: { ratings.$: { $gt: 5, $lt: 9 } } } )
C. db.inventory.find( { ratings: { ratings: { $gt: 5, $lt: 9 } } } )
D. db.inventory.find( { ratings: { $elemMatch: { $gt: 3, $lt: 6 }

Answer: C

NEW QUESTION # 70
What command adds a document to the class101 collection where the student is " Randall " and the student passed the class?

A. db.class101.insertOne({ student: " Randall " , passed: true })
B. db.class101.insertOne({ student: Randall, passed: true })
C. db.class101.insertOne({ student: Randall, passed: True })
D. db.class101.insertOne({ student: " Randall " , passed: True })

Answer: A

Explanation:
db.collection.insertOne() inserts one BSON document into a collection. In mongosh, string values must be quoted and Boolean literals use JavaScript syntax: lowercase true or false. Therefore the student ' s name must appear as " Randall " , and the passed flag must be true. Option D is the only choice that gets both value types correct. Option A quotes the string properly but uses True, which is not the JavaScript Boolean literal.
Options B and C leave Randall unquoted, so mongosh would interpret it as an identifier or variable rather than as the literal string required by the document. Option C additionally uses the invalid capitalized Boolean form.
If an _id field is omitted, MongoDB automatically adds a unique _id, typically an ObjectId, before storing the document. That behavior does not affect the two requested fields. This question tests both CRUD syntax and the BSON/JavaScript literal representation used by mongosh. The correct command is db.class101.insertOne ({ student: " Randall " , passed: true }), so option D is correct.
Study Guide reference/topic:MongoDB Architecture and Core Operations - insertOne(), BSON values, strings, Booleans, and automatic _id.

NEW QUESTION # 71
Which of the documents below will be retrieved by the following query? Assume the documents are stored in a collection called "sample". Check all that apply.
db.sample.find( { "$or" : [ { "a" : { "$in" : [ 3, 10] > }, { "b" : { "$lt" : 2 > > ] > )

A. {".Jd" :: 8, "a": 11, "c": 1, "b": 0}
B. {".Jd" :6, "a": 1, "c" :1, "b" :5}
C. { \Jd" :10,"a": 3, "c": 1, "b": 1}
D. {''__id" :3, "a": 4, "c" :0, "b" :14}
E. {".Jd" :: 5, "a": 3, "c" :: 0, "b": 12}
F. {''_Jd" :7, "a": 8, "c" :1, "b" :7}
G. {".Jd" :: 2, "a": 2, "c" :: 0, "b": 1}
H. {".Jd" :: 4, "a": 5, "c" :: 0, "b": 17}
I. { ''\Jd" :9, "a": 17, "c": 1, "b": 1}
J. {".Jd" :: 1, "a": 0, "c" :: 0, "b": 2}

Answer: A,C,E,G,I

NEW QUESTION # 72
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