Pass MongoDB C100DEV With 2Pass4sure Exam Dumps - Updated on Nov-2023
Fully Updated C100DEV Dumps - 100% Same Q&A In Your Real Exam
MongoDB C100DEV certification exam consists of 60 multiple-choice questions that need to be completed within 90 minutes. The questions are designed to test your knowledge and experience in areas such as CRUD Operations, Data Modeling, Indexing, Aggregation, Replication, Sharding, and Application Development. To get certified, you need to score at least 75% in the exam. You can take the exam from any location at any time, as it is an online exam.
NEW QUESTION # 149
Which of the following roles provides the same read-only privileges as read role on all databases except local and config?
- A. userAdminAnyDatabase
- B. readWriteAnyDatabase
- C. readAnyDatabase
Answer: C
Explanation:
https://docs.mongodb.com/manual/reference/built-in-roles/#mongodb-authrole-readAnyDatabase
NEW QUESTION # 150
It's very important to picking a good shard key. If we don't choose a good shard key, then we won't be able to see the benefits of horizontal scaling.
- A. True
- B. False
Answer: A
Explanation:
https://docs.mongodb.com/manual/core/sharding-shard-key/
NEW QUESTION # 151
Select all true statements regarding to replica sets in MongoDB.
- A. We can have up to 50 replica set members, but only 7 of those will be voting members.
- B. Replica set members have a fixed role assigned.
- C. Replica sets use failover to provide high availability to client applications.
Answer: A,C
Explanation:
Replica set members have a fixed role assigned. -> False The availability of the system will be ensured by failing over the role of primary to an available secondary node through an election. https://docs.mongodb.com/manual/replication/
NEW QUESTION # 152
Suppose you have a following index for football_palyers collection: { "last_name": 1, "details.country": 1, "details.club": 1, "age": 1 } Determine which queries are able to successfully use a given index for both filtering and sorting.
- A. db.football_players.find( { "last_name": { "$gte": "L" } } ).sort( { "details.club": -1 } )
- B. db.football_players.find( { "last_name": "Lewandowski" } ).sort( { "details.country": 1, "details.club": 1 } )
- C. db.football_players.find( { "last_name": "Lewandowski", "details.country": { "$gt": "D" } } ).sort( { "details.country": 1 } )
Answer: B,C
Explanation:
db.football_players.find( { "last_name": "Lewandowski", "details.country": { "$gt": "D" } } ).sort( { "details.country": 1 } ) Yes, because it uses the same field for equality and sorting. db.football_players.find( { "last_name": { "$gte": "L" } } ).sort( { "details.club": -1 } ) No, this query doesn't use equality on the index prefix.
NEW QUESTION # 153
MongoDB can benefit from adding more RAM to your servers.
- A. Yes
- B. No
Answer: A
NEW QUESTION # 154
You have the following configuration file: storage: dbPath: /var/mongodb/db net: bindIp: localhost port: 27000 security: authorization: enabled You have to update this file such that: * mongod sends logs to /var/mongodb/logs/mongod.log * mongod is forked and run as a daemon Select correct Answer.
- A. storage: dbPath: /var/mongodb/db net: bindIp: localhost port: 27000 security: authorization: enabled processManagement: fork: true
- B. storage: dbPath: /var/mongodb/db net: bindIp: localhost port: 27000 security: authorization: enabled systemLog: destination: file path: "/var/mongodb/logs/mongod.log" processManagement: fork: true
- C. storage: dbPath: /var/mongodb/db net: bindIp: localhost port: 27000 security: authorization: enabled systemLog: destination: file path: "/var/mongodb/logs/mongod.log"
Answer: B
Explanation:
https://docs.mongodb.com/manual/reference/configuration-options/
NEW QUESTION # 155
Which collection method do you need to use to drop a specific collection?
- A. db.collection.remove()
- B. db.collection.dropCollection()
- C. db.collection.drop()
- D. db.collection.dropIndex()
Answer: C
Explanation:
https://docs.mongodb.com/manual/reference/method/db.collection.drop/
NEW QUESTION # 156
You have the following replica set configuration: conf = { "_id": "replset", "version": 1, "protocolVersion": 1, "members": [ { "_id": 0, "host": "192.168.120.24:27017", "priority": 2, "votes": 1 }, { "_id": 1, "host": "192.168.120.24:27018", "priority": 1, "votes": 1 }, { "_id": 1, "host": "192.168.120.24:27019", "priority": 1, "votes": 1 } ] } Select all true statements about this configuration.
- A. This configuration is incorrect. You can only specify a priority of 0 or 1.
- B. This configuration is correct.
- C. This configuration is incorrect. _id field must be unique for each member in a replica set.
- D. This configuration is incorrect. Host information must be unique for each member in a replica set.
Answer: C
Explanation:
https://docs.mongodb.com/manual/replication/#replication
NEW QUESTION # 157
What is the built-in database called admin in MongoDB for?
- A. The admin database is used to store information about shards in shared MongoDB cluster.
- B. The admin database stores data describing the MongoDB server. For replica sets, it also stores information about the replication process.
- C. The admin database plays an important role in the authentication and authorization process. Certain actions performed by administrators also require access to this database.
Answer: C
Explanation:
https://docs.mongodb.com/manual/tutorial/manage-users-and-roles/
NEW QUESTION # 158
Given a companies collection where each document has the following structure: { _id: ObjectId("52cdef7c4bab8bd675297efd"), name: 'ZoomInfo', homepage_url: 'http://www.zoominfo.com', blog_url: 'http://zoominfoblogger.wordpress.com/', twitter_username: 'ZoomInfo', founded_year: 2000, email_address: '' } Extract all companies from this collection that have the same Twitter username as the company name. Which query should you use?
- A. db.companies.find( { $expr: { $eq: ['$name', '$twitter_username'] } } )
- B. db.companies.find( { $expr: { $ne: ['$name', '$twitter_username'] } } )
- C. db.companies.find( { $expr: { $eq: ['$name', 'twitter_username'] } } )
- D. db.companies.find( { $expr: { $eq: ['name', 'twitter_username'] } } )
Answer: A
Explanation:
db.companies.find( { $expr: { $eq: ['$name', 'twitter_username'] } } ) You have to use $ sign to evaluate twitter_username field. db.companies.find( { $expr: { $eq: ['name', 'twitter_username'] } } ) You have to use $ sign to evaluate name and twitter_username fields. https://docs.mongodb.com/manual/reference/operator/query/expr/
NEW QUESTION # 159
Given a companies collection where each document has the following structure:
{ _id: ObjectId('61a8b90c6d5ce6a7d8fef95e'), name: 'Facebook', tag_list: ['facebook', 'college', 'students', 'network'], description: 'Social network' }
Which of the following commands will add new fields to the updated documents?
- A. db.companies.updateMany({ "name": "Facebook" }, { "$set": { "country": "USA" } })
- B. db.companies.updateMany({ "name": "Facebook" }, { "$set": { "description": "Social media" } })
- C. db.companies.updateMany({ "name": "Facebook" }, { "$push": { "tag_list": "media" } })
Answer: A
Explanation:
https://docs.mongodb.com/manual/reference/method/db.collection.updateMany/
NEW QUESTION # 160
Suppose you want to join two collections in the same database. What aggregation stage do you need to use?
- A. $lookup
- B. $out
- C. $project
Answer: A
Explanation:
https://docs.mongodb.com/manual/reference/operator/aggregation/lookup/
NEW QUESTION # 161
Select all true statements about one-to-zillions relationships (a special case of the one-to-many relationship in MongoDB).
- A. We need to be extremely careful when writing queries that retrieve data on the zillions side.
- B. Representing this relationships with document embedding is not recommended.
- C. This relationship is created to emphasize the fact that huge cardinalities can impact design choices.
Answer: A,B,C
Explanation:
https://docs.mongodb.com/manual/tutorial/model-embedded-one-to-many-relationships-between-documents/
NEW QUESTION # 162
Given the following MongoDB URI: mongodb+srv://datascientist34:[email protected]/admin Which of the following statements are true? (select 2)
- A. The password used for authentication is ta33w9rd
- B. The user datascientist34 is trying to authenticate on database admin.
- C. There are 178 nodes in the xtr replica set.
- D. The password used for authentication is xtr-178
Answer: A,B
Explanation:
Explanation: https://docs.mongodb.com/manual/reference/connection-string/
NEW QUESTION # 163
Data modeling. You are considering the use of nesting or the references in your data model. Data read operations must be fast. Which option would be more appropriate?
- A. Use of nesting.
- B. Use of reference.
Answer: A
Explanation:
https://docs.mongodb.com/manual/core/data-modeling-introduction/
NEW QUESTION # 164
......
MongoDB C100DEV Certification Exam covers a variety of topics, including data modeling, indexing, querying, and data management. C100DEV exam is designed to test the developer's knowledge and skills in using MongoDB to create and manage databases, perform CRUD operations, and work with the MongoDB aggregation pipeline. MongoDB Certified Developer Associate Exam certification exam consists of 60 multiple-choice questions that must be completed within 90 minutes.
Latest C100DEV Exam Dumps - Valid and Updated Dumps: https://www.2pass4sure.com/MongoDB-Certified-Developer-Associate/C100DEV-actual-exam-braindumps.html
Verified C100DEV Exam Questions Certain Success: https://drive.google.com/open?id=1uDSn928z3WGIGxZTCHbtwaW3D_zqsQqI