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How to get next document in the cursor returned by the db.collection.find() method. (Select one)

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How can you update an array field with nested documents in MongoDB?

Using the $addToSet operator with the nested document.

Using the $set operator with the specific nested field.

Using the $[] positional operator with the nested field.

Using the $set operator with the entire updated array.

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What

does the $

out stage do?

Returns all

the documents currently in the aggregation pipeline as one large document.

Removes

documents from the aggregation pipeline.

Creates a new collection that contains the

documents in this stage of the aggregation pipeline.

✅

Removes the

current user who is running the aggregation pipeline from the database.

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What is the recommended order of fields in a compound index? (Select one.)

Equality, Sort, Range

The order of indexed fields is not important.

Range, Sort, Equality

Sort, Range, Equality

❌

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The $unset operator deletes a particular field: { $unset: { field1: "", ... } }. The specified value in the

$unset expression (i.e. "") does not impact the operation.

True

False

❌

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What is a single-field index? (Select one.)

An index that supports efficient querying against fields that are already indexed by another user-defined index

An index that supports efficient querying against multiple fields

An index that doesn't support efficient querying against fields that have an array value

An index that supports efficient querying against a single field

✅

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Using the MongoDB shell, how do you remove the customer collection and its indexes?:

db.customers.delete();

db.customers.remove({});

db.customers.drop();

✅

db.customers.remove({}).indexes();

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Given a cursor named myCursor, which command returns a boolean value?:

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Replacing a document in MongoDB will keep the original document's `_id` field.

True

False

❌

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The Principle of Least Privilege states that:

the user

administrator should have the ability to create other users.

all

users should be restricted to the lowest level of privilege.

users should have the least privilege required

for their intended purpose.

the

database should have limited access to local resources.

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