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The C100DBA Exam is a challenging and comprehensive certification exam that requires a strong understanding of MongoDB administration. Individuals who pass the exam will have demonstrated their proficiency in administering MongoDB databases and will be well-positioned to advance their careers in the field of database administration.
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To prepare for the MongoDB C100DBA certification exam, candidates need to have a good understanding of MongoDB 4.4, including its features, components, and architecture. They also need to be familiar with database administration tasks, such as backup and recovery, performance tuning, and security management. MongoDB offers several resources to help candidates prepare for the exam, including online courses, study guides, and practice exams. By passing the MongoDB C100DBA certification exam, candidates can demonstrate their proficiency in MongoDB database administration and enhance their credibility as database professionals.
MongoDB is a free and open-source cross-platform document-oriented database program. It has become one of the most popular NoSQL databases used in modern applications. As a result, many companies are seeking qualified professionals to manage their MongoDB instances. To ensure that professionals have the necessary knowledge and expertise to manage MongoDB instances, MongoDB offers a certification program. The MongoDB C100DBA (MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4)) Certification Exam is one of the exams in this program.
NEW QUESTION # 171
Which of the following are valid json documents? Select all that apply.
Answer: B,C
NEW QUESTION # 172
Consider an inventory collection that contains these documents:
{ " _id " : 1, " product " : " x-small box " , " colors " : [ " brown " , " black " , " white " ], " qty " : 50 }
{ " _id " : 2, " product " : " small box " , " colors " : [ " brown " , " white " ], " qty " : 60 }
{ " _id " : 3, " product " : " medium box " , " colors " : [ " black " , " grey " , " white " ], " qty " : 45 }
{ " _id " : 4, " product " : " large box " , " colors " : [ " grey " ], " qty " : 50 }
{ " _id " : 5, " product " : " x-large box " , " colors " : [ " grey " , " white " ], " qty " : 10 } What result set does the following query return?
db.inventory.find({
$or: [
{ " product " : " x-small box " },
{
$and: [
{ " qty " : { $ne: 50 } },
{ " colors " : { $nin: [ " brown " ] } }
]
}
]
})
Answer: B
Explanation:
The outer $or returns a document if either branch is true. Document 1 satisfies the first branch because product equals " x-small box " , so it is included regardless of the second branch. The nested $and requires both qty != 50 and the absence of " brown " from the colors array. Document 2 has quantity 60 but contains " brown " , so it fails $nin. Document 3 has quantity 45 and its colors do not include brown, so it satisfies both conditions. Document 4 has no brown but quantity is exactly 50, so it fails $ne: 50. Document 5 has quantity
10 and colors [ ' grey ' , ' white ' ], so it also satisfies both nested predicates. The final set is therefore documents 1, 3, and 5. This question also illustrates that MongoDB applies an implicit AND between multiple top-level field predicates in the same document, but here the explicit $and makes the required conjunction clear. Option D is the only answer containing exactly the matching documents.
Study Guide reference/topic:MongoDB Architecture and Core Operations - logical query operators, $or, $and,
$ne, and $nin.
NEW QUESTION # 173
What tool do you use if you want to extract a CSV from mongo?
Answer:
Explanation:
mongoexport
NEW QUESTION # 174
A MongoDB administrator needs to create a new role with only the read privileges for the products database.
What command should the administrator use?
Answer: B
Explanation:
MongoDB custom roles are defined in terms of privileges, and each privilege specifies a resource plus one or more allowed actions. For read/query access, find is a valid privilege action. To represent all normal collections in a specified database, MongoDB uses a resource document with the target database and an empty collection name, for example { db: " products " , collection: " " }. Option B therefore combines the correct resource scope with the find action and does not grant write capability. The distractors confuse built-in role names with privilege actions. read, readWrite, and readAnyDatabase are built-in roles or role concepts, not the appropriate action values for the privileges[].actions list shown here. Likewise, a literal " * " collection value is not the documented database-wide resource form for this custom privilege. In practice, an administrator could also assign MongoDB ' s built-in read role rather than creating a custom role if its permissions exactly match the requirement. Given the specific createRole() choices, however, option B is the technically correct construction.
Study Guide reference/topic:Security, Networking, and Encryption - RBAC, custom roles, resources, and privilege actions.
NEW QUESTION # 175
Addding the index {a:l} can potentially decrease the speed of which of the following operations? Check all that apply.
Answer: A,C
NEW QUESTION # 176
......
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