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MongoDB interview questions part 30
MongoDB interview questions part 30
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Total Questions: 20
1. Point out the correct statement :
A. Database commands cannot return statistics regarding the current database state with greater fidelity
B. Monitoring is a critical component of all database administration
C. The MongoDB distribution does not include utilities that quickly return statistics about instances’ performance and activity
D. All of the mentioned
Show Correct Answer
Correct Answer is :
Database commands cannot return statistics regarding the current database state with greater fidelity
2. _________ tracks and reports the current read and write activity of a MongoDB instance, and reports these statistics on a per collection basis.
A. mongostat
B. mongod
C. mongotop
D. all of the mentioned
Show Correct Answer
Correct Answer is :
mongotop
3. _______ method is useful tool for identifying the database instance’s in-progress operations.
A. db.current
B. db.currentOp
C. db.Op
D. none of the mentioned
Show Correct Answer
Correct Answer is :
db.currentOp
4. Point out the correct statement :
A. MMS offers point in time recovery of MongoDB replica sets
B. MongoDB provides a web interface that exposes diagnostic and monitoring information in a simple web page
C. db.Status() outputs an account of the state of a MongoDB instance
D. none of the mentioned
Show Correct Answer
Correct Answer is :
MongoDB provides a web interface that exposes diagnostic and monitoring information in a simple web page
5. ___________ returns a general overview of the status of the database, detailing disk usage, memory use, connection, journaling, and index access.
A. dbStats
B. db.serverStatus()
C. db.stats()
D. none of the mentioned
Show Correct Answer
Correct Answer is :
db.serverStatus()
6. The ________ reflect the amount of storage used, the quantity of data contained in the database, and object, collection, and index counters.
A. dbStats
B. db.serverStatus()
C. db.statserver()
D. none of the mentioned
Show Correct Answer
Correct Answer is :
dbStats
7. ________ provides statistics that resemble dbStats on the collection level
A. dbStats
B. db.serverStatus()
C. db.statserver()
D. collstats
Show Correct Answer
Correct Answer is :
collstats
8. Which of the following command returns quickly and does not impact MongoDB performance ?
A. dbStats
B. db.serverStatus()
C. db.stats()
D. none of the mentioned
Show Correct Answer
Correct Answer is :
db.serverStatus()
9. Which of the following document details the state and configuration of the replica set and statistics about its members ?
A. replSetGetStatus
B. db.serverStatus()
C. db.stats()
D. none of the mentioned
Show Correct Answer
Correct Answer is :
none of the mentioned
10. The enabled setting for mongod and mongos instances disables the __________ status page.
A. home
B. primary
C. secondary
D. none of the mentioned
Show Correct Answer
Correct Answer is :
home
11. Which of the following is not a NoSQL database ?
A. SQL Server
B. MongoDB
C. Cassandra
D. None of the mentioned
Show Correct Answer
Correct Answer is :
SQL Server
12. Point out the correct statement :
A. Documents can contain many different key-value pairs, or key-array pairs, or even nested documents
B. MongoDB has official drivers for a variety of popular programming languages and development environments
C. When compared to relational databases, NoSQL databases are more scalable and provide superior performance
D. All of the mentioned
Show Correct Answer
Correct Answer is :
All of the mentioned
13. Which of the following is a NoSQL Database Type ?
A. SQL
B. Document databases
C. JSON
D. All of the mentioned
Show Correct Answer
Correct Answer is :
Document databases
14. Which of the following is a wide-column store ?
A. Cassandra
B. Riak
C. MongoDB
D. Redis
Show Correct Answer
Correct Answer is :
Cassandra
15. Point out the wrong statement :
A. Non Relational databases require that schemas be defined before you can add data
B. NoSQL databases are built to allow the insertion of data without a predefined schema
C. NewSQL databases are built to allow the insertion of data without a predefined schema
D. All of the mentioned
Show Correct Answer
Correct Answer is :
Non Relational databases require that schemas be defined before you can add data
16. “Sharding” a database across many server instances can be achieved with :
A. LAN
B. SAN
C. MAN
D. All of the mentioned
Show Correct Answer
Correct Answer is :
SAN
17. Most NoSQL databases support automatic __________, meaning that you get high availability and disaster recovery
A. processing
B. scalability
C. replication
D. all of the mentioned
Show Correct Answer
Correct Answer is :
replication
18. Which of the following are the simplest NoSQL databases ?
A. Key-value
B. Wide-column
C. Document
D. All of the mentioned
Show Correct Answer
Correct Answer is :
Key-value
19. ________ stores are used to store information about networks, such as social connections.
A. Key-value
B. Wide-column
C. Document
D. Graph
Show Correct Answer
Correct Answer is :
Graph
20. NoSQL databases is used mainly for handling large volumes of ______________ data.
A. unstructured
B. structured
C. semi-structured
D. all of the mentioned
Show Correct Answer
Correct Answer is :
unstructured
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