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| Certification Vendor: | MongoDB |
|---|---|
| Exam Name: | MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) |
| Exam Number: | C100DBA |
| Exam Format: | Multiple Response, Multiple Choice |
| Available Languages: | English |
| Certificate Validity Period: | Not officially specified |
| Exam Price: | $150 USD |
| Exam Duration: | 90 minutes |
| Real Exam Qty: | 60-66 |
| Passing Score: | 490/600 |
| Related Certifications: | MongoDB Certified Developer Associate |
| Sample Questions: | MongoDB C100DBA Sample Questions |
| Exam Way: | Online proctored or authorized testing center |
| Pre Condition: | Recommended knowledge of fundamental database concepts, basic system administration, and basic JavaScript. No mandatory prerequisite exam. |
| Official Syllabus URL: | https://learn.mongodb.com/pages/mongodb-associate-database-administrator-exam |
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The best way to study for this exam is by using multiple-choice questions and practice exams because they're structured in a way that's similar to what's actually on the exam. Guide documents are also a great way to study for this exam. If you have any specific questions regarding the exam, I would recommend stopping by your local learning center to discuss with the instructors or any of their recommended people who can help you. The best way to study for this exam is by using multiple-choice questions that are similar in structure to what's actually on the exam because it'll help you become more familiar with how these types of questions are asked and answered. A good way to get started studying for this exam is through online database tutorials, site guides, and other documents. Guide documents are also a great way to study for this exam because they explain what is expected when taking the exams. Study guide documents are the best way to study for this exam. Guide documents are also a great way to study for this exam because they explain what is expected when taking the exams.
NEW QUESTION # 22
Consider a products collection:
{ " _id " : 1, " item " : " t-shirt " , " color " : " red " , " price " : 10 }
{ " _id " : 2, " item " : " sweater " , " color " : " green " , " price " : 20 }
{ " _id " : 3, " item " : " belt " , " color " : " black " , " price " : 15 }
{ " _id " : 4, " item " : " hat " , " color " : " green " , " price " : 12 } What operation modifies the price of all products that have a color value of " green " ?
Answer: A
Explanation:
The operation must update every matching document and use the $inc update operator with correct syntax.
updateMany() applies the update to all documents matching { color: " green " }. The $inc operator must be the top-level update operator and receive a field-to-amount mapping, so the valid update document is { $inc: { price: 5 } }. Option C satisfies both requirements. The sweater price increases from 20 to 25, and the hat price increases from 12 to 17. Option B uses a syntactically correct $inc expression, but the legacy update() call shown does not explicitly request a multi-document update, so it does not meet the stated requirement to modify all green products. Options A and D place $inc beneath the price field instead of placing $inc at the update-operator level, which is not valid update syntax. $inc operates atomically on each affected document and can be used with positive or negative numeric increments. Therefore, the correct multi-document update is db.products.updateMany({color: " green " }, {$inc:{price:5}}), making C correct.
Study Guide reference/topic:MongoDB Architecture and Core Operations - updateMany(), update operators, filters, and $inc.
NEW QUESTION # 23
In a replica set, a_________number of members ensures that the replica set is always able to select a primary.
Answer: B
NEW QUESTION # 24
In a replica set with a primary and two secondaries, what should the write concern be set to so only a single node is required to acknowledge a write operation before it is deemed successful?
Answer: B
Explanation:
MongoDB write concern defines the level of acknowledgment requested for a write. Setting the numeric value w: 1 means that a write is considered acknowledged after the primary has accepted it; no secondary acknowledgment is required. In a replica set with one primary and two secondaries, those secondaries can replicate the operation asynchronously after the client has already received success. That configuration is represented by { writeConcern: { w: 1 } }, making option D correct. The numeric type matters: w can be specified as an integer count or certain strings such as " majority " , but the string " 1 " is not the intended numeric node count shown by the question. Options B and C also omit the w field structure expected inside a write concern document. The durability trade-off is important: a w:1 write can be acknowledged before any secondary has replicated it, so a sudden primary failure before replication may result in that write being rolled back after failover. If the workload requires stronger durability, w: " majority " is commonly used. For exactly one acknowledging node, however, the correct setting is D.
Study Guide reference/topic:Cluster Reliability and Data Resilience - write concern, w acknowledgments, replica-set durability, and rollback risk.
NEW QUESTION # 25
Which of the following commands will return all the posts with number of likes greater than 100 and less than
200, both inclusive?
Answer: A
NEW QUESTION # 26
We can insert multiple documents in bulk using which of the following operations:
Answer: D
NEW QUESTION # 27
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