MongoDB Interview Questions - 31 | Snaprecruit.com

MongoDB Interview Questions - 31 | Snaprecruit.com

MongoDB interview questions part 31

MongoDB interview questions part 31

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Total Questions: 20

1. Object_Id is similar to _________ key in Relational Databases

Correct Answer is : primary

2. Object_Id is similar to _________ key in Relational Databases

Correct Answer is : primary

3. Point out the correct statement :

Correct Answer is : ObjectIds are small, likely unique, fast to generate, and ordered

4. Point out the correct statement :

Correct Answer is : ObjectIds are small, likely unique, fast to generate, and ordered

5. Which of the field is reserved for use as a primary key ?

Correct Answer is : _id

6. Which of the field is reserved for use as a primary key ?

Correct Answer is : _id

7. In the mongo shell, you can access the creation time of the ObjectId, using the ______ method..

Correct Answer is : getTimestamp()

8. In the mongo shell, you can access the creation time of the ObjectId, using the ______ method..

Correct Answer is : getTimestamp()

9. Point out the wrong statement :

Correct Answer is : None of the mentioned

10. Point out the wrong statement :

Correct Answer is : None of the mentioned

11. To ensure functioning replication, do not store values that are of the _______ regular expression type in the _id field.

Correct Answer is : None of the mentioned

12. To ensure functioning replication, do not store values that are of the _______ regular expression type in the _id field.

Correct Answer is : None of the mentioned

13. GridFS uses a _________ index on the chunks collection for the files_id and n fields.

Correct Answer is : unique

14. GridFS uses a _________ index on the chunks collection for the files_id and n fields.

Correct Answer is : unique

15. The ______ field is always the first field in the document.

Correct Answer is : _id

16. The ______ field is always the first field in the document.

Correct Answer is : _id

17. The GridFS index allows efficient retrieval of __________ using the files_id and n values

Correct Answer is : chunks

18. The GridFS index allows efficient retrieval of __________ using the files_id and n values

Correct Answer is : chunks

19. Which of the following query is used to generate a new ObjectId, use the ObjectId() constructor with no argument

Correct Answer is : x = ObjectId()

20. Which of the following query is used to generate a new ObjectId, use the ObjectId() constructor with no argument

Correct Answer is : x = ObjectId()

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