Which of the following is not a part of Cassandra architecture?
column
memtable
sstable
cache
Q.2.
Mongo looks for a database server listening on port
27017
8080
23
443
Q.3.
Initial release of MongoDB was in the year?
2000
2005
2009
2011
Q.4.
Which command in Mongodb is equivalent to SQL select?
find ()
search()
document
none
Q.5.
Point out the correct statement :
Hadoop is an ideal environment for extracting and transforming small volumes of data
Hadoop stores data in HDFS and supports data compression/decompression
The Giraph framework is less useful than a MapReduce job to solve graph and machine learning
all
Q.6.
MongoDB supports query joins between collections.
True
false
Q.7.
What is the maximum size of a MongoDB document?
2MB
16MB
12MB
No limit.Depends on RAM
Q.8.
Which is not a supported index type in MongoDB?
TTL Index
Neospatial
Unique
None of These
Q.9.
Which of the following line skips the first 5 documents in the bios collection and returns all remaining documents?
db.bios.find().limit( 5 )
db.bios.find().skip( 1 )
db.bios.find().skip( 5)
db.bios.find().sort( 5 )
Q.10.
Does MongoDB supports query joins between collections ?
Yes
No
Q.11.
Which command returns all of the documents in the customers collection?
db.customers.all();
db.find().customers();
db.customers.find();
db.customers.show();
Q.12.
How do you find documents with a matching item in an embedded array?
db.customers.findmatch ({“jobs”:”secretary”})
db.customers.find ({“jobs:secretary”})
db.customers.find ({“jobs”:[“secretary”]})
db.customers.find ({“jobs”:”secretary”})
Q.13.
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?
Set the replace option to true.
Use the replaceOne() command instead.
You can’t. Once set, the _id field cannot be changed.
Use the updateOne() command instead.
Q.14.
Which programming language is used to write MongoDB queries? (Alternative: In the MongoDB shell, what programming language is used to make queries?)
Python
JavaScript
SQL
TypeScript
Q.15.
You have two text fields in your document and you’d like both to be quickly searchable. What should you do?
Create a text index on each field.
MongoDB is not able to do this.
Create a compound text index using both fields.
Create a text index on one field and a single field index on the other.
Q.16.
Given an ObjectId in _id, how do you get the time it was created?
getDateTime(_id)
_id.createDate()
_id.getTimestamp()
_id.getDateTime()
Q.17.
Suppose your aggregation pipeline terminated with an exception referring to exceeded memory limit. What is the best way to resolve the issue?
Set useMemory to twice amount indicated in exception.
Switch a 64 bit instance of MongoDB.
Increase the memory of the MongoDB server.
Set allowDiskUse to true.
Q.18.
You have just secured your previously unsecured MongoDB server, but the server is still not requiring authentication. What is the best option?
Restart the mongod process.
Issue the secure() command.
Issue the mongoimport command.
Issue the authenticate() command.
Q.19.
Is MongoDB better than other SQL databases?
Yes
No
Q.20.
Which of the following method corresponds to Order by clause in SQL?
sort()
order()
orderby()
All the above
Support mcqgeeks.com by disabling your adblocker.
Please disable the adBlock and continue. Thank you.