Test C100DBA Lab Questions - C100DBA Exam Reference

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MongoDB C100DBA certification exam consists of 60 multiple-choice questions that need to be completed within 90 minutes. C100DBA exam is available in English, Chinese, Japanese, and Korean languages. C100DBA exam can be taken online, and the candidate can schedule the exam at a time and date that is convenient for them. C100DBA Exam Fee is $150, and the candidate needs to achieve a minimum score of 65% to pass the exam.

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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.

MongoDB C100DBA Exam consists of 60 multiple-choice questions and has a time limit of 90 minutes. Candidates must achieve a score of at least 65% to pass the exam and earn the MongoDB Certified DBA Associate certification. C100DBA exam is delivered online and can be taken from anywhere in the world. Candidates who pass the exam can demonstrate to potential employers that they have the skills and knowledge required to manage MongoDB databases effectively.

MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Sample Questions (Q143-Q148):

NEW QUESTION # 143
What does the following query do when performed on the posts collection? db.posts.update({_id:l},{Title:This is post with ID 1"})

Answer: C


NEW QUESTION # 144
Below is a sample document of "orders" collection

Answer: A


NEW QUESTION # 145
Which is the default mode in which the explain() command runs?

Answer: A


NEW QUESTION # 146
In a replica set, which member is responsible for maintaining copies of the primary ' s data?

Answer: D

Explanation:
A replica-set secondary maintains a replicated copy of the primary ' s dataset. The primary records data- changing operations in its oplog, and secondary members continuously copy and apply those oplog entries asynchronously to keep their data synchronized. This redundancy allows an eligible secondary to participate in an election and potentially become primary if the current primary becomes unavailable. mongos, option B, is the query-routing process used in a sharded cluster; it does not store an application dataset copy. An arbiter, option C, participates in replica-set voting and elections but deliberately does not maintain a copy of the database data. A shard, option D, is a data partition in a sharded cluster and is normally implemented as a replica set in production, but "shard" is not the replica-set member role that replicates the primary ' s data.
Secondary behavior is central to MongoDB high availability, read-scaling options, backup strategies, and failover. Administrators monitor secondary replication lag and health to ensure the copies remain sufficiently current. Therefore the member responsible for maintaining copies of the primary ' s data is the secondary, making option A correct.
Study Guide reference/topic:Cluster Reliability and Data Resilience - replica-set primaries, secondaries, oplog replication, and redundancy.


NEW QUESTION # 147
Which of the following aggregate commands in MongoDB uses a pipeline approach with the goals of improving the aggregation performance?

Answer: B


NEW QUESTION # 148
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