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MongoDB C100DEV Exam details, Passing Score, and Time Limit
Exam Duration: 90 minute
Exam Length: 60 Question
Language: English
Passing score: 60%
Exam Format: Multiple choice questions
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MongoDB Certified Developer Associate Exam Sample Questions (Q203-Q208):
NEW QUESTION # 203
You have the following index in a movies collection: { "title": 1, "imdb.rating": -1, "imdb.votes": -1, "type": 1 } Can the following query use the given index for both filtering and sorting?
db.movies.find( { "title": { "$lt": "M" } } ).sort( { "imdb.votes": -1 } )
- A. No
- B. Yes
Answer: A
Explanation:
No, this query does not use equality in the index prefix. When you use an index to filter and sort, the query must contain equality conditions on all prefix keys that precede the sort keys. Also, it skipped the next key in the "imdb.rating" prefix in the sort predicate. https://docs.mongodb.com/manual/indexes/
NEW QUESTION # 204
You have the following index in a movies collection: { "title": 1, "imdb.rating": -1, "imdb.votes": -1, "type": 1 } Can the following query use the given index for both filtering and sorting?
db.movies.find( { "title": "James Bond", "imdb.rating": { "$gt": 8} } ).sort( { "imdb.rating": 1 } )
- A. No
- B. Yes
Answer: B
Explanation:
Yes, although this query does not use equality in the "imdb.rating" field of the index prefix, it does use the same field for sorting. https://docs.mongodb.com/manual/indexes/
NEW QUESTION # 205
Which of the following roles provides minimal privileges needed for backing up data in MongoDB?
- A. update
- B. restore
- C. backup
Answer: C
Explanation:
https://docs.mongodb.com/manual/reference/built-in-roles/#mongodb-authrole-backup
NEW QUESTION # 206
Select all true statements regarding to pipelines and the Aggregation Framework.
- A. The Aggregation Framework provides us many stages to filter and transform data.
- B. An aggregation pipeline is an array of stages.
- C. Aggregation Framework does not have the group stage for grouping data.
- D. The aggregation pipeline cannot operate on a sharded collection.
- E. An aggregation pipeline consists of one or more stages that process documents.
Answer: A,B,E
Explanation:
https://docs.mongodb.com/manual/aggregation/
NEW QUESTION # 207
Select all true statements regarding to multikey indexes.
- A. Multikey indexes don't support indexes on multiple array fields on single documents.
- B. An index doesn't become multikey until a document that has an array value is inserted.
- C. Multikey indexes allow us to index on array fields.
Answer: A,B,C
Explanation:
https://docs.mongodb.com/manual/core/index-multikey/
NEW QUESTION # 208
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