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MongoDB C100DBA exam is a certification exam designed for database administrators who work with MongoDB 4.4. C100DBA exam is intended to test the candidate's knowledge of MongoDB architecture, schema design, deployment, security, and maintenance. By passing C100DBA exam, a candidate can demonstrate their expertise in administering MongoDB databases and receive a MongoDB Certified DBA Associate certification.
What is the registration procedure of MongoDB C100DBA Exam
Once the exam date has been announced by MongoDB, registration can be done. Registering for this exam is a little different from other certification exams. The steps for taking this exam must be followed. Registration for this exam will open on the date of the announcement. Registering for this certification exam is a free-of-cost process. This is a computer-based exam and is usually two hours long. MongoDB C100DBA Dumps is the best source for passing this certification exam with a high score. The exam takes place at Pearson Vue testing centers. This entry-level certification is only available in the English language. MongoDB website offers information about its training, certification, and more.
NEW QUESTION # 10
Which mongodb tool is used to report details on number of database operations in MongoDB?
- A. mongorestore
- B. mongostat
- C. mongodump
- D. mongotop
Answer: B
NEW QUESTION # 11
Which of the following commands finds all the documents in the posts collection with post timestamp field as null?
- A. db.posts.find( { post_timestamp: { $fieldtype: null } } )
- B. db.posts.find( { post_timestamp: { $type: null } } )
- C. db.posts.find( { post_timestamp : { $type; 10 > > )
- D. db.posts.find( { post_timestamp: { $fieldtype: 10 } } )
Answer: B
NEW QUESTION # 12
In a replica set, a_________number of members ensures that the replica set is always able to select a primary.
- A. Depends on the application architecture
- B. Odd
- C. Even
- D. 0
Answer: B
NEW QUESTION # 13
What is the output of the following program?
- A. 100 s
- B. 1s
- C. 100 ms
- D. 60 s
Answer: D
NEW QUESTION # 14
You perform the following operation in the shell: db.foo.insert( { } ); What gets inserted?
- A. A document will be inserted with the same _id as the last document inserted
- B. A document that matches the collection's existing schema, but with null fields
- C. No document will be inserted; an error will be raised
- D. A document with an _id assigned to be an Objectld
- E. An empty document
Answer: D
NEW QUESTION # 15
Which of the following is supported by MongoDB?
- A. Transaction Management
- B. ACID Transactions
- C. Journaling
- D. Relationships between Collections (Primary Key Foreign Key)
Answer: C
NEW QUESTION # 16
In a sharded cluster, from which node does one stop the balancer process before initiating backup?
- A. mongos node
- B. replicaset primary node
- C. config server node
- D. Any node
Answer: A
NEW QUESTION # 17
Write the command(s) are correct to enable sharding on a database "testdb" and shard a collection "testCollection" with _id as shard key.
Answer:
Explanation:
sh.enableSharding("testdb") & sh.shardCollection("testdb.testCollection", {_id : 1 }, true )
NEW QUESTION # 18
Below is a sample document in a given collection test.
{ a : 5, b : 3, c: 2, d : 1 }
Given a compound index { a: 1, b:l, c:l, d:l}, Which of the below query will not use in-memory sorting? Select all valid.
- A. db.test.find( { a: 5, b: 3 } ).sort( { c: 1, d : 1 } )
- B. db.test.find( { a: 5, b: 3 } ).sort( {c: 1 } )
- C. db.test.find( { a: 5, b: 3 } ).sort( { a: 1, b: 1, c: 1 } )
- D. db.test.find( { a: 5, b: 3 } ).sort( { a: 1} )
Answer: A,B
NEW QUESTION # 19
In mongodb how do you update a document partially?
- A. $project
- B. $update
- C. $set
- D. $modify
Answer: C
NEW QUESTION # 20
Consider the following example document:
{
"_id": Objectld("5360c0a0a655a60674680bbe"),
"user"
"login": "irOn"
"description": "Made of steel"
"date": ISODate("2014-04-30T09:16:45.836Z"),
}
>
and index creation command:
db.users.createlndex( { "user.login": 1, "user.date": -1 }, "mylndex" )
When performing the following query:
db.users.find( { "user.login": /Air.*/ }, { "user":1, "_id":0 } ).sort( { "user.date":1 } )
which of the following statements correctly describe how MongoDB will handle the query? Check all that apply.
- A. As a covered query using "mylndex" because we are filtering out "_id" and only returning "user.login"
- B. MongoDB will need to do a table/collection scan to find matching documents
- C. None of the above
- D. As an optimized sort query (scanAndOrder = false) using "mylndex" because we are sorting on an indexed field
- E. As an indexed query using "mylndex" because field "user.login" is indexed
Answer: E
NEW QUESTION # 21
Which node in a replica set does accept write operation?
- A. secondary
- B. arbiter
- C. hidden
- D. primary
Answer: D
NEW QUESTION # 22
Which of the following is true of the mechanics of replication in MongoDB? Check all that apply.
- A. Clients read from the nearest member of a replica ser by default
- B. Members of a replica set may replicate data from any other data-bearing member of the set by default
- C. Operations on the primary are recorded in a capped collection called the oplog
Answer: C
NEW QUESTION # 23
Given a collection posts as shown below having a document array comments, which of the following command will create an index on the comment author descending?
- A. db.posts.createIndex({^comments.$.author":-l});
- B. db. posts.createIndex({^comments.author" :1});
- C. db.posts.createIndex({^commerits.author";-!});
Answer: C
NEW QUESTION # 24
Addding the index {a:l} can potentially decrease the speed of which of the following operations? Check all that apply.
- A. db.collection.update({b:456>, {$inc: {a:l> })
- B. db.collection.insert( { a:341})
- C. db.collection.find( {a : 232} )
Answer: A,B
NEW QUESTION # 25
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The MongoDB C100DBA exam consists of 60 multiple-choice questions and has a duration of 90 minutes. It is proctored online, making it accessible to individuals from anywhere in the world. C100DBA exam is designed to test a candidate's ability to perform real-world tasks and solve problems that are commonly encountered in MongoDB database administration.
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