MongoDB Interview Questions - 13

1. ______________ documents capture relationships between data by storing related data in a single document structure.

A. Capped

B. Embedded

C. External

D. Internal

Correct Answer is : Embedded

2. Point out the wrong statement :

A. The key decision in designing data models for MongoDB applications revolves around the structure of documents and how the application represents relationships between data

B. There are two tools that allow applications to represent these relationships: references and embedded documents

C. When designing data models, always consider the application usage of the data (i.e. queries, updates, and processing of the data) as well as the inherent structure of the data itself

D. All of the mentioned

Correct Answer is : All of the mentioned

3. A ____________ data model with embedded data combines all related data for a represented entity in a single document.

A. normalized

B. denormalized

C. non relational

D. relational

Correct Answer is : denormalized

4. For the __________ storage engine, if the document size exceeds the allocated space for that document, MongoDB relocates the document on disk.

A. MAPv1

B. MAPv2

C. MAPv3

D. MAPv4

Correct Answer is : MAPv3

5. With MongoDB 3.0.0,the default use of the Power of _________ Allocations minimizes the occurrences of re-allocations as well as allows for the effective reuse of the freed record space.

A. 2 Sized

B. 3 Sized

C. 4 Sized

D. 5 Sized

Correct Answer is : 2 Sized

6. ___________ strategy is used to explicitly avoid document growth.

A. deallocation

B. allocation

C. pre-allocation

D. none of the mentioned

Correct Answer is : pre-allocation

7. Each index in MongoDB requires at least _________ of data space.

A. 8KB

B. 28KB

C. 68KB

D. 108KB

Correct Answer is : 8KB

8. Which of the following information is captured by database profiler ?

A. Read operations

B. Write operations

C. Cursor Operations

D. All of the mentioned

Correct Answer is : All of the mentioned

9. Point out the correct statement :

A. A limit() value of 0 (i.e. .limit(0)) is equivalent to setting no limit

B. The behavior of limit() is undefined for values less than -231 and greater than 231

C. You can use the ulimit command at the system prompt to check system limits

D. All of the mentioned

Correct Answer is : All of the mentioned

10. Which of the following collection is capped ?

A. system.index

B. system.replica

C. system.profile

D. all of the mentioned

Correct Answer is : system.profile

11. The ___________ provides information for various lock types and lock modes held during the operation.

A. admin.system.authlocks

B. system.profile.locks

C. admin.system.locks

D. all of the mentioned

Correct Answer is : system.profile.locks

12. Point out the wrong statement :

A. Beginning with version 3.0, MongoDB ships with the WiredTiger storage engine

B. Some global operations, typically short lived operations involving multiple databases, still require a global “instance-wide” lock

C. The MMAPv1 storage engine uses collection-level locking

D. None of the mentioned

Correct Answer is : None of the mentioned

13. Which of the following keyword represents lock on collection ?

A. Database

B. Collection

C. Metadata

D. All of the mentioned

Correct Answer is : Collection

14. How many types of locking modes exist in MongoDB ?

A. 1

B. 2

C. 3

D. More than 3

Correct Answer is : More than 3

15. Which of the following represents number of times the operation acquired the lock in the specified mode ?

A. system.profile.locks.acquireCount

B. system.profile.locks.acquireWaitCount

C. system.profile.locks.Count

D. none of the mentioned

Correct Answer is : system.profile.locks.acquireCount

16. __________ can be used to limit the size of the result document for a query operation.

A. limit()

B. aggregate()

C. skip()

D. none of the mentioned

Correct Answer is : limit()

17. Which of the following code is used for successful exit of task ?

A. 0

B. 1

C. 2

D. 3

Correct Answer is : 0

18. Point out the correct statement :

A. 2 is returned by mongod if there is a mismatch between hostnames specified on the command line and in the local.sources collection

B. When an index covers a query, MongoDB can both match the query conditions and return the results using only the index keys

C. Both 2 and 4 are returned by mongod if there is a mismatch between hostnames specified on the command line and in the local.sources collection

D. All of the mentioned

Correct Answer is : 2 is returned by mongod if there is a mismatch between hostnames specified on the command line and in the local.sources collection

19. Instance exits cleanly is represented by ___ exit code

A. 4

B. 1

C. 2

D. 3

Correct Answer is : 4

20. Which of the follwing code is returned by mongod if a moveChunk operation fails to confirm a commit ?

A. 5

B. 6

C. 7

D. 3

Correct Answer is : 5

MongoDB interview questions part 13

MongoDB interview questions part 13

Take as many assements as you can to improve your validate your skill rating

Total Questions: 20

1. ______________ documents capture relationships between data by storing related data in a single document structure.

2. Point out the wrong statement :

3. A ____________ data model with embedded data combines all related data for a represented entity in a single document.

4. For the __________ storage engine, if the document size exceeds the allocated space for that document, MongoDB relocates the document on disk.

5. With MongoDB 3.0.0,the default use of the Power of _________ Allocations minimizes the occurrences of re-allocations as well as allows for the effective reuse of the freed record space.

6. ___________ strategy is used to explicitly avoid document growth.

7. Each index in MongoDB requires at least _________ of data space.

8. Which of the following information is captured by database profiler ?

9. Point out the correct statement :

10. Which of the following collection is capped ?

11. The ___________ provides information for various lock types and lock modes held during the operation.

12. Point out the wrong statement :

13. Which of the following keyword represents lock on collection ?

14. How many types of locking modes exist in MongoDB ?

15. Which of the following represents number of times the operation acquired the lock in the specified mode ?

16. __________ can be used to limit the size of the result document for a query operation.

17. Which of the following code is used for successful exit of task ?

18. Point out the correct statement :

19. Instance exits cleanly is represented by ___ exit code

20. Which of the follwing code is returned by mongod if a moveChunk operation fails to confirm a commit ?

Similar Interview Questions

Search for latest jobs

For Employers

For Partner

For Jobseekers

Help

Follow Us

snaprecruit

Download mobile appsJust Swipe to apply for jobs. Try it out !