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MongoDB C100DBA certification exam is designed to test the proficiency of candidates in various areas related to MongoDB database administration, including deployment, configuration, security, performance optimization, backup and recovery, and scaling. C100DBA exam consists of multiple-choice questions and requires a passing score of 75% or higher to obtain the certification. C100DBA exam is administered online and can be taken at any time from anywhere in the world.
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The MongoDB C100DBA certification exam is a challenging exam that aims at demonstrating the knowledge of administering and using MongoDB. The exam is designed to test your knowledge of administering, installing, configuring, monitoring, securing, and troubleshooting MongoDB. This article will cover the objectives that you should know for this certification along with some tips on how to pass it. MongoDB C100DBA Dumps is the latest and the most useful exam dumps for the MongoDB C100DBA certification exam.
To successfully pass the MongoDB C100DBA exam, candidates should have a solid understanding of MongoDB architecture, database design, indexing and querying data, replication and sharding, backup and recovery strategies, and security best practices. Additionally, candidates should be familiar with various MongoDB tools and utilities such as mongodump, mongorestore, and mongoexport. C100DBA exam consists of multiple-choice questions and scenarios that simulate real-world scenarios that database administrators might encounter. Passing the exam demonstrates that an individual possesses the skills and knowledge required to effectively manage and maintain MongoDB databases.
NEW QUESTION # 78
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: { $gt: 3, $lt: 6 }
- B. db.inventory.find( { ratings: { ratings.$: { $gt: 5, $lt: 9 } } } )
- C. db.inventory.find( { ratings: { $elemMatch: { $gte: 3, $lte: 6 } } } )
- D. db.inventory.find( { ratings: { ratings: { $gt: 5, $lt: 9 } } } )
Answer: D
NEW QUESTION # 79
Which of the following is true about aggregation framework?
- A. the aggregate command operates on a multiple collection
- B. Each aggregation operator need to return atleast one of more documents as a result
- C. A single aggregation framework operator can be used more than once in a query
- D. Pipeline expressions are stateless except accumulator expressions used with $group operator
Answer: B,C,D
NEW QUESTION # 80
You perform the following query on the sayings collection, which has the index
{ quote : "text" }:
Assuming the documents below are in the collection, which ones will the following query return? Check all that apply.
db.sayings.find( { $text : { $search : "fact find" } } )
- A. { _id : 1, quote : "That's a fact, Jack." }
- B. { _id : 2, quote : "Find out if that fact is correct." }
- C. { _id : 3, quote : "Nobody will ever catch me." }
Answer: A,B
NEW QUESTION # 81
Dada una coleccion, cuales devuelve con la siguiente query
db.coleccion.find({nombre:"ruben",apellido:"gomez"},{nombre:l,apellido:l,aficion:l});
- A. { "_id" : Objectld("580a42acdfblb5al7427d301"), "nombre" : "Luis", "apellido" : "gomez", "aficion" : u
"flipar" } - B. { "_id" : Objectld("580a42acdfblb5al7427d301"), "nombre" : "ruben", "apellido" : "Pablo" , "aficion" : u
"flipar"} - C. { "-id" : Objectld("580a42b5dfblb5al7427d302"), "nombre" : "ruben", "apellido" : "gomez", "aficion" :
v u "flipar" } - D. { "_id" : Objectld("580a42acdfblb5al7427d301"), "nombre" : "ruben", "apellido" : "gomez" >
Answer: C,D
NEW QUESTION # 82
In a replica set, a_________number of members ensures that the replica set is always able to select a primary.
- A. Odd
- B. Even
- C. 0
- D. Depends on the application architecture
Answer: A
NEW QUESTION # 83
Which mongodb tool is used to report details on number of database operations in MongoDB?
- A. mongodump
- B. mongotop
- C. mongostat
- D. mongorestore
Answer: C
NEW QUESTION # 84
Aggregation Pipelines have a limit of:
- A. 2 MB document and 100 MB RAM
- B. 16 MB document and 100 MB RAM
- C. 2 MB document and no limit on RAM
- D. No limit on document and 100 MB RAM
Answer: B
NEW QUESTION # 85
Which of the following node is used during election in a replication cluster?
- A. hidden
- B. secondary
- C. arbiter
- D. primary
Answer: C
NEW QUESTION # 86
In a collection that contains 100 post documents, what does the following command do? db. posts.
find().skip(5).limit(5)
- A. Skips the first five documents and returns the next five
- B. Limits the first five documents and then return them in reverse order
- C. Skip and limit nullify each other. Hence returning the first five documents
- D. Skips the first five documents and returns the sixth document five times
Answer: A
NEW QUESTION # 87
As per the aggregation pipeline optimization concepts, if you have a $sort followed by a $match:
- A. Providing these parameters in any order does not impact the performance
- B. MongoDB does not do any movements by default and will use the order provided
- C. $sort moves before $match
- D. $match moves before $sort
Answer: D
NEW QUESTION # 88
Which mongodb tools allow us to work with our data in a human readable format?
- A. mongodump
- B. mongoimport
- C. mongostat
- D. mongoexport
Answer: B,D
NEW QUESTION # 89
Which of the following does MongoDB use to provide High Scalability?
- A. Indexing
- B. Replication
- C. Write Concern
- D. Sharding
Answer: D
NEW QUESTION # 90
Using an arbiter allows one to easily ensure an odd number of voters in replica sets. Why is this important?
- A. To protect agains network partitions
- B. For more efficient backup operations
- C. To add greather redundancy
- D. To help in disaster recovery
- E. To enable certain read preference settings
Answer: A
NEW QUESTION # 91
Which of the following commands can cause the database to be locked?
- A. Inserting data
- B. Map-reduce
- C. Issuing a query
- D. All of the above
Answer: D
NEW QUESTION # 92
What is the output of following two commands in MongoDB: db. posts. insert({n_id":l}) db.posts.insert({"_id":l})
- A. This will throw a duplicate key error
- B. It will insert two documents and throw a warning to the user
- C. Two documents will be inserted with _id as 1
- D. MongoDB will automatically increment the _id of the second document as 2
Answer: A
NEW QUESTION # 93
Consider the following example document from the sample collection. All documents in this collection have the same schema.
Which of the following queries will replace this with the document.
- A. db.sample.update( { "_id" : 3 } , { "$set" : { "_id" : 7 , "c" : 4 } } )
- B. db.sample.update( { "_id" : 3 } , { "_id" : 7 , "c" : 4 } )
- C. db.sample.update( { "_id" : 3 } , { "_id" : 7 , "c" : 4 , { "$unset" : [ "a" , "b" ] } } )
- D. db.sample.update( { "_id" : 3 } , { "_id" : 7 , "c" : 4 } , { "justOne" : true } ) // This operation cannot be done with a single query.
Answer: C
NEW QUESTION # 94
If the value of totalKeysExamined is 30000 and the value of totalDocsExamined is 0, which of the following option is correct?
- A. The query returned 0 documents
- B. The query used an index to fetch the results
- C. The query returned 30000 documents after scanning the documents
- D. None of the above
Answer: B
NEW QUESTION # 95
Consider the following documents:
You perform the following query;
How many documents will be updated by the query?
- A. 0
- B. 1
- C. 2
- D. 3
- E. 4
Answer: C
NEW QUESTION # 96
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