C100DBA Pass4sure Questions & C100DBA Actual Test & C100DBA Practice Training

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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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Real and Updated MongoDB C100DBA Exam Questions

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MongoDB C100DBA Certification Exam is offered by MongoDB, a popular NoSQL database management system that is used by many organizations worldwide. C100DBA exam is designed to test the knowledge and skills of candidates in various areas of MongoDB database administration, including backup and recovery, security, performance tuning, and data modeling.

MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Sample Questions (Q150-Q155):

NEW QUESTION # 150
Which operations add new documents to a collection?

Answer: A,D


NEW QUESTION # 151
In a sharded replica set environment, the w Option provides ability for write concern and j Option provides ability for the data to be written on disk journal. Consider that we have a seven member replica set and we want to assure that the writes are committed to journal. What should be the value of j?

Answer: A


NEW QUESTION # 152
What is the correct read preference option to direct all read operations to the secondary?

Answer: D

Explanation:
MongoDB read preference controls which replica-set members are eligible to serve read operations. The mode secondary sends reads only to eligible secondary members. If no suitable secondary is available, the read fails rather than falling back to the primary. That strict behavior is exactly what the question asks for.
secondaryPreferred, option A, normally routes reads to secondaries but can use the primary when no suitable secondary is available, so it does not guarantee that every read is served by a secondary. Options B and C are not valid MongoDB read preference mode names. Secondary reads are useful for specific workloads, but DBAs must account for asynchronous replication: a secondary can lag the primary, so data returned from a secondary may be stale relative to the latest acknowledged primary write. MongoDB provides additional controls such as tag sets and maximum staleness settings to restrict which secondary members are considered acceptable. When the explicit requirement is to direct all reads away from the primary and exclusively to secondary members, secondary is the correct read preference. Therefore option D is correct.
Study Guide reference/topic:Cluster Reliability and Data Resilience - replica-set read preferences, secondary reads, and staleness.


NEW QUESTION # 153
A MongoDB collection named users contains sample documents with fields including name, age, address, description, city, and occupation.
The administrator uses the following query to perform a collection scan:
db.users.find({ city: " New York " , occupation: " Software Engineer " }) What compound index will improve the performance of the query the MOST?

Answer: B,D

Explanation:
The query contains equality predicates on both city and occupation, so an efficient compound index should contain both fields. Options A and C include only one query predicate plus the unrelated name field, forcing MongoDB to perform additional filtering that the index cannot resolve. Options B and D both contain the complete predicate set. For a query consisting entirely of equality predicates, MongoDB does not require those equality keys to appear in a particular order relative to one another for the query itself; { city: 1, occupation: 1 } and { occupation: 1, city: 1 } can both support the two equality conditions effectively. The original question appears to expect B because it mirrors the field order used in the query, but that distinction is not technically required under MongoDB ' s equality-key guidance. Field order becomes much more significant when the workload also needs a particular index prefix, sort order, range predicate, or when one ordering better supports additional common queries. Accordingly, the technically accurate review result is B and D, with B being the likely intended exam choice.
Study Guide reference/topic:Indexing and Query Optimization - compound indexes, equality predicates, and index key ordering.


NEW QUESTION # 154
Which of the following is a valid insert statement in mongodb? Select all valid.

Answer: B,C


NEW QUESTION # 155
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