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MongoDB C100DBA exam is an industry-recognized certification exam that evaluates an individual's proficiency in managing and administering MongoDB databases. MongoDB is a popular NoSQL database that is widely used for its flexibility, scalability, and performance. The C100DBA Exam is designed to test the skills required to install, configure, and maintain MongoDB databases, as well as troubleshoot performance issues and ensure data availability and security.
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While preparing for the MongoDB Certified DBA Associate Exam (C100DBA), candidates should focus on gaining a deep understanding of MongoDB and its various features. They should also practice working with MongoDB and managing databases hands-on. Additionally, candidates should familiarize themselves with the exam format and practice taking mock exams to improve their chances of passing the exam on the first attempt.
MongoDB C100DBA Certification is globally recognized and highly valued in the IT industry. It demonstrates a candidate's proficiency in managing MongoDB databases and their ability to optimize database performance and ensure high availability. MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) certification is also a testament to a candidate's commitment to continuous learning and professional development in the field of database administration.
NEW QUESTION # 133
Update If Correct is an approach for which of the following concepts in MongoDB:
Answer: B
NEW QUESTION # 134
A collection named products contains the following documents:
{ " _id " : 1, " name " : " Laptop " , " price " : 1500 }
{ " _id " : 2, " name " : " Smartphone " , " price " : 800 }
{ " _id " : 3, " name " : " Tablet " , " price " : 600 }
{ " _id " : 4, " name " : " Monitor " , " price " : 300 }
{ " _id " : 5, " name " : " Headphones " , " price " : 200 }
Given the following query:
db.products.find().sort({ " price " : -1 }).limit(2)
What is the expected output?
Answer: B
Explanation:
The query first applies .sort({ price: -1 }). In MongoDB, -1 specifies descending order, so the result stream is ordered from the highest price to the lowest: Laptop at 1500, Smartphone at 800, Tablet at 600, Monitor at
300, and Headphones at 200. The subsequent .limit(2) restricts the cursor to the first two documents in that sorted sequence. Therefore, only Laptop and Smartphone are returned. Option B identifies the two lowest- priced products rather than the highest. Option C reflects the sort but ignores the limit(2) stage. Option D shows the two lowest products in ascending order and therefore contradicts both the requested sort direction and the limit semantics. For a large collection, a single-field index on price could support this sort efficiently because MongoDB can traverse an index in either direction; an ascending index can be scanned backward to satisfy a descending sort and vice versa. The logical query result, however, is independent of whether such an index exists. Option A is the correct output.
Study Guide reference/topic:MongoDB Architecture and Core Operations - cursor sorting, limiting result sets, and query result ordering.
NEW QUESTION # 135
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?
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