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MongoDB C100DEV Exam covers topics

• Fundamentals of system programming
• Basic JavaScript programming
• Fundamentals of software development
• Fundamental database concepts

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MongoDB Certified Developer Associate Exam Sample Questions (Q169-Q174):

NEW QUESTION # 169
Select all true statements about text search in MongoDB.

• A. A collection can only have one text search index, but that index can cover multiple fields.
• B. Text indexes can include any field whose value is a string.
• C. To perform text searches on a collection we use $text operator.
• D. Text indexes cannot include any field whose value is an array of string elements.
• E. MongoDB provides text indexes to support text search queries on string content.
• F. To perform text search queries, you must have a text index on your collection.

Answer: A,B,C,E,F Explanation:
https://docs.mongodb.com/manual/text-search/
NEW QUESTION # 170
Can you perform the following operation?
db.users.insertOne({})

• A. Yes, it will only insert a document with an _id field (auto-generated).
• B. Yes, it will only insert a document without any fields.
• C. No, it will throw an error.

Answer: A
NEW QUESTION # 171
You have the following config file: storage: dbPath: /data/db systemLog: destination: file path: /var/log/mongod.log net: bindIp: localhost,192.168.168.62 security: keyFile: /var/pki/keyfile processManagement: fork: true Select all the directories that MongoDB must have access to

• A. /data/db
• B. /var/pki
• C. /var/log

Answer: A,B,C Explanation:
https://docs.mongodb.com/manual/reference/configuration-options/
NEW QUESTION # 172
Select all true statements about data modeling in MongoDB.

• A. Unlike SQL databases, where the table schema must be specified and declared before inserting the data, MongoDB collections don't, by default, require documents to have the same schema.
• B. The field set and data type for each field can differ across documents within a collection.
• C. MongoDB can easily handle both unstructured and structured data sets.
• D. In MongoDB we can enforce document validation rules for a collection during update and insert operations.

Answer: A,B,C,D Explanation:
https://docs.mongodb.com/manual/core/data-modeling-introduction/
NEW QUESTION # 173
Suppose you insert the following documents into a companies collection:
db.companies.insertMany([ {"name": "Facebook"}, {"name": "Twitter"} ])
Select all true statements about this command. (select 3)

• A. The _id field is not specified in any of these documents.
• B. This command will insert two documents into the collection.
• C. This command will insert one document into the collection.
• D. MongoDB will automatically create an _id field for each document and it will be unique.

Answer: A,B,D Explanation:
https://docs.mongodb.com/manual/reference/method/db.collection.insertMany/
NEW QUESTION # 174
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