MongoDB MCQ: MongoDB Multiple Choice Questions and Answers

MongoDB MCQ with answers and explanations for placement tests and job interviews. These solved MongoDB MCQs are useful for the campus placement for all freshers including Engineering Students, MCA students, Computer and IT Engineers, etc.

Our MongoDB MCQ (MongoDB Multiple Choice Questions ) focuses on various parts of the MongoDB cross-platform and its concept. It will be useful for anyone learning MongoDB platform Basics, Essentials, and/or Fundamentals. We will regularly update the quiz and most interesting thing is that questions come in a random sequence. So every time you will feel new questions.

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Guideline of MongoDB MCQ:

This MongoDB MCQ is intended for checking your MongoDB platform knowledge. It takes 1 hour to pass the MongoDB MCQ. If you don’t finish the MongoDB MCQ within the mentioned time, all the unanswered questions will count as wrong. You can miss the questions by clicking the “Next” button and return to the previous questions by the “Previous” button. Every unanswered question will count as wrong. MCQ on MongoDB has features of randomization which feel you a new question set at every attempt.

In this MongoDB Quiz, we have also implemented a feature that not allowed the user to see the next question or finish the MongoDB quiz without attempting the current MongoDB MCQ.

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MongoDB MCQ

MongoDB MCQ: MongoDB Multiple Choice Questions and Answers

1 / 55

Which MongoDB shell command should you use to back up a database?

2 / 55

You need to delete the index you created on the description field. Which command will accomplish this?

3 / 55

A MongoDB instance has at least what three files?

4 / 55

How do you find documents with a matching item in an embedded array?

5 / 55

To import a JSON array into Mongo, what flags are needed with MongoDBimport?

6 / 55

What is the recommended way to delete a user?

7 / 55

You have a collection of thousands of students. You'd like to return the second set of 20 documents from the sorted collection. What is the proper order in which to apply the operations?

8 / 55

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

9 / 55

MongoDB ships with a variety of files. Which file runs the MongoDB shell?

10 / 55

You need to get the names of all the indexes on your current collection. What is the best way to accomplish this?

11 / 55

You would like the stats() command to return kilobytes instead of bytes. Which command should you run?

12 / 55

In an MongoDB mapReduce command, the reduce function should ____.

13 / 55

Given a cursor named myCursor, pointing to the customers collection, how to you get basic info about it?

14 / 55

Which field is required of all MongoDB documents?

15 / 55

Given an ObjectId in _id, how do you get the time it was created?

16 / 55

Which command returns all of the documents in the customers collection?

17 / 55

Which query bypasses the first 5 customers and returns the next 10?

18 / 55

Which command adds members to the replica set from MongoDB shell?

19 / 55

What is true about indexes?

20 / 55

What is the purpose of an arbiter in a replica set?

21 / 55

Why are ad-hoc queries useful?

22 / 55

By default, applications direct their read operations to which member of the replica set?

23 / 55

What is NOT a standard role in MongoDB?

24 / 55

You'd like a set of documents to be returned in last name, ascending order. Which query will accomplish this?

25 / 55

In the MongoDB shell, how can you tell if an index was used with a query?

26 / 55

Which shell query displays all citizens with an age greater than or equal to 21?

27 / 55

To cleanly shut down MongoDB, what command should you use from the MongoDB shell?

28 / 55

What is the preferred format to store geospatial data in MongoDB?

29 / 55

You have two text fields in your document and you'd like both to be quickly searchable. What should you do?

30 / 55

You want to modify an existing index. What is the best way to do this?

31 / 55

From the MongoDB shell, how do you create a new document in the customers collection?

32 / 55

You would like to know how many different categories you have. Which query will best get the job done?

33 / 55

You want to know how many types of items you have in each category. Which query does this?

34 / 55

You have a collection named restaurants with the geographical information stored in the location property, how do you create a geospatial index on it?

35 / 55

What the primary database in a replica set fails, when does failover begin?

36 / 55

Which command returns a specific document in the user's collection?

37 / 55

Given a cursor named myCursor, pointing to the customers collection, how to you get basic info about it?

38 / 55

To import a CSV file into MongoDB, which command should you issue?

39 / 55

You have just secured your previously unsecured MongoDB server, but the server is still not requiring authentication. What is the best option?

40 / 55

Choose the shell command that connects to a MongoDB database.a

41 / 55

Given a customer collection which includes fields for gender and city, which aggregate pipeline shows the number of female customers in each city? (Alternative: How can you view the execution performance statistics for a query?)

42 / 55

What is the correct option to set up Kerberos when starting MongoDBd?

43 / 55

One of the documents in your collection has an _id based upon an older database design and you want to change it. You write an update command to find the document and replace the _id but the _id isn't changed. How should you fix the issue?

44 / 55

You are going to do a series of updates to multiple records. You find setting the multi option of the update() command too tiresome. What should you do instead?

45 / 55

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

46 / 55

What does a MongoDB collection consist of?

47 / 55

What is the correct query to find all of the people who have a home phone number defined?

48 / 55

Suppose your aggregation pipeline terminated with an exception referring to exceeded memory limit. What is the best way to resolve the issue?

49 / 55

On a newly created collection, which field will have an index?

50 / 55

How often do the members of a replica set send heartbeats to each other?

51 / 55

How do you create a text index?

52 / 55

A compound index allows you to ___ ?

53 / 55

To restrict the number of records coming back from a query, which command should you use?

54 / 55

Which programming language is used to write MongoDB queries? (Alternative: In the MongoDB shell, what programming language is used to make queries?)

55 / 55

Which MongoDB shell command deletes a single document?

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