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WorksheetsBDA Unit Test II
Total questions: 20
Worksheet time: 20mins
Three types of collection used in Cassandra_______
Array,List,Map
List,map,struct
List,Set,Map
set,map,array
A contained user to hold application data in Cassandra--------
Document
table
Keyspaces
records
Which command in Mongodb is equivalent to SQL select?
find ()
search()
document
none
MongoDB process collection of documents using _________ operations
Hbase
Hive
Map-reduce
none
Which one of the following is equivalent in MongoDB select* from employee order by salary desc;?
db.employee.find.sort({“salary”:1}]
db.employee.sort ({“salary”:-1}]
db.employee.find.sort ({“salary”:-1}
db.employee.sort({“salary”:1}]
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
Which of the following operation adds a new document to the users collection ?
add
insert
truncate
drop
Which of the following format is supported by MongoDB ?
XML
BSON
SQL
All
MongoDB has been adopted as ________ software by a number of major websites and services
backend
frontend
both
none
In aggregation pipeline, the _______ pipeline stage provides access to MongoDB queries.
$catch
$match
$batch
All
here are _________ types of read requests that a coordinator can send to a replica
3
2
4
1
Which of the following is not a NoSQL database ?
SQL
MONGODB
CASSANDRA
NONE
Which of the following is a NoSQL Database Type
MONGODB
JSON
CASSANDRA
A & C
the term nosql was introduced by______
brewers
doug cutting
carlo strozzi
none
CRUD operation in mognodb are______
create read update drop
create read update delete
create read update local
none
Point out the wrong statement :
Non Relational databases require that schemas be defined before you can add data
NoSQL databases are built to allow the insertion of data without a predefined schema
NewSQL databases are built to allow the insertion of data without a predefined schema
all
MongoDB supports query joins between collections.
True
false
Which of the following is not a part of Cassandra architecture?
column
memtable
sstable
cache
default block size on hdfs?
64MB
128MB
64KB
256MB
caassandra was born at?
yahoo
none
