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Welcome to the Aggregation Concepts and Aggregation Mechanics MCQs Page

Dive deep into the fascinating world of Aggregation Concepts and Aggregation Mechanics with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Aggregation Concepts and Aggregation Mechanics, a crucial aspect of MongoDB. In this section, you will encounter a diverse range of MCQs that cover various aspects of Aggregation Concepts and Aggregation Mechanics, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within MongoDB.

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Check out the MCQs below to embark on an enriching journey through Aggregation Concepts and Aggregation Mechanics. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of MongoDB.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Aggregation Concepts and Aggregation Mechanics. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Aggregation Concepts and Aggregation Mechanics MCQs | Page 2 of 12

Explore more Topics under MongoDB

Q11.
Aggregation pipeline was introduced in MongoDB version ______

a.

2.1

b.

2.2

c.

2.4

d.

3.0

Discuss
Answer: (b).2.2
Q12.
Point out the wrong statement.

a.

Aggregation pipeline have some limitations on value types and result size

b.

The aggregation pipeline is a framework for data aggregation modeled on the concept of data processing pipelines

c.

Documents enter a multi-stage pipeline that transforms the documents into an aggregated results

d.

All of the mentioned

Discuss
Answer: (d).All of the mentioned
Q13.
________ calculates aggregate values for the data in a collection.

a.

db.collection.aggregate

b.

db.collection.agg

c.

db.collection.pipeline

d.

all of the mentioned

Discuss
Answer: (a).db.collection.aggregate
Q14.
Cursors returned from aggregation only supports cursor methods like ________________

a.

cursor.hasNext()

b.

cursor.Next()

c.

cursor.has()

d.

all of the mentioned

Discuss
Answer: (a).cursor.hasNext()
Q15.
Point out the wrong statement.

a.

Some pipeline stages may generate new documents or filter out documents

b.

Pipeline stages do need to produce one output document for every input document

c.

Pipeline stages can appear multiple times in the pipeline

d.

None of the mentioned

Discuss
Answer: (b).Pipeline stages do need to produce one output document for every input document
Q16.
______ can be used to iterate the cursor of document results returned by db.collection.find().

a.

it

b.

next

c.

cur

d.

none of the mentioned

Discuss
Answer: (a).it
Q17.
To handle large datasets, set _________ option to true to enable writing data to temporary files.

a.

enableDiskUse

b.

allowDiskUse

c.

validateDiksUse

d.

none of the mentioned

Discuss
Answer: (b).allowDiskUse
Q18.
Syntax for specifying an initial batch size for the cursor is ________________

a.

cursor: { batchSize: <string> }

b.

cursor: { batchSize: <int> }

c.

cur: { batchSize: <int> }

d.

none of the mentioned

Discuss
Answer: (b).cursor: { batchSize: <int> }
Q19.
Query shape consists of a combination of query, sort, and _________ specifications.

a.

selection

b.

projection

c.

collection

d.

none of the mentioned

Discuss
Answer: (c).collection
Q20.
Which of the following method is overrided by Index filters?

a.

hint

b.

plan

c.

execute

d.

all of the mentioned

Discuss
Answer: (a).hint
Page 2 of 12

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