CASSANDRA QUIZ DESCRIPTION

Following represent column in NoSQL______

  • Field
     

  • Document
      

  • Database
     

  • Collection

Who developed by NoSQL ?

  • Alen turing
        

  • Carlo Strozzi
     

  • Mayank K.
     

  • None of them

Job tracker runs on

  • Namenode
      

  • Secondary datanode
      

  • Datanode
     

  • Secondary namenode

NoSQL database are most often referred to as ..........

  • Network
      

  • Relational
     

  • Distributed
     

  • None of the above

Hadoop do need specialised hardware to process the data.

  • True

  • False

Cassandra uses the ________ in the background to allow the nodes to communicate with each other and detect any faulty nodes in the cluster.
 

  • Gossip Protocol
     

  • Commit Protocol
     

  •  Mem Protocol
     

  •  Talk Protocol

What is the full form of HDFS?

  • Highly distributed file shell
     

  • Hadoop directed file system
     

  • Hadoop distributed file system
     

  • Highly distributed file system.

 Which of the following is a primary classification for nosql architectures

  • Document & Graph Database
      

  • Key / value database
       

  • column-oriented database
     

  • All of the Above

Which method builds the cluster with the given contact points?

  • ResultSet execute()
     

  • Session connect()
     

  • Cluster build()
     

  • Cluster.Builder addContactPoint()

Select the upper limit for counters of a Map Reduce job?

  •  ~50
      

  • ~150
      

  • ~5s
      

  • ~15

Which of the following is a characteristic of a NoSQL database?

  • Uses JSON
      

  • Requires JOINs
     

  • Needs a schema
     

  • Uses tables for storage

Which of them is a memory-resident data structure?
 

  • Data center
     

  • SSTable
     

  • Mem-table
     

  • Bloom filter

What is the role of journal node?

  •  Report the edit log information of the blocks in the data node.
     

  • Report the location of the blocks in a data node
        

  • Report the Schedules when the jobs are going to run
     

  • Report the activity of various components handled by resource manager

Which of the following is true about hadoop high availability?

  • Hadoop High Availability feature supports only single Namenode within a Hadoop cluster.
     

  • Hadoop High Availability feature tackles the namenode failure problem for all the components in the hadoop stack.
     

  • Hadoop High Availability feature tackles the namenode failure problem only for the MapReduce component in the hadoop stack.
      

  • All of the Above

The core principle of nosql is __________.

  • Low availability
       

  • High availability
       

  • Both A and B
     

  • None of the above

 Identify the incorrect statement?

  •  All the znodes are prefixed using the default /hbase location
      

  • The znodes that you’ll most often see are the ones that coordinate operations like Region Assignment
      

  • .ZooKeeper provides an interactive shell that allows you to explore the ZooKeeper state
     

  • All of the above

Which architecture does NoSQL follow?

  •  Shared Memory
      

  • Shared Nothing
     

  • Shared Disk
        

  • Shared Nothing Architecture

 CQL stands for?
 

  • Cassandra Query Language
     

  • Cluster Query Language
     

  • Commit Query Language
     

  • Component Query Language

Select the correct parameter to describes destination directory which would contain the archive ?

  • archiveName
     

  • destination
        

  • source
     

  • None of these

A __________ is a special column, therefore, it is also a key-value pair, but it stores a map of sub-columns.

  •  sub column
     

  • key column
     

  • super column
     

  • column

Which of the following is a unit of replication in Cassandra?
 

  • Row
     

  •  Column
     

  • Both A and B
     

  •  None of the above

Which of the following feature overcomes this single point of failure?

  • HDFS federation
       

  • Erasure coding
      

  • High availability
     

  • None of these

Which of the following are the simplest NoSQL databases?

  • Document
      

  • Wide column
     

  • Key value
     

  • All of them

Which NoSQL database is best?

  • MongoDB
      

  • ElasticSearch
     

  • DynamoDB
     

  • All of the above

What was hadoop written in?

  • Perl
      

  • Java (software platform)
       

  • Lua (programming language)
      

  • Java (programming language)

 InputFormat class calls the ________ function and computes splits for each file and then sends them to the jobtracker.

  • getSplits
     

  • gets
     

  • puts
      

  • None of theseC

Cassandra has peer-to-peer distributed system across its nodes.

  • TRUE
     

  •  FALSE
     

  •  Can be true or false
     

  • Can not say

What are the advantages of 3x replication schema in hadoop?

  • Reliability
        

  • Fault tolerance
     

  • High availability
     

  • All of the Above

In HDFS put command is used to...........

  • Copy files from local file system to HDFS.
       

  • Copy files from from HDFS to local filesystem.
     

  • Copy files or directories from HDFS to local filesystem.
      

  • Copy files or directories from local file system to HDFS.

What are the advantages of NoSQL?

  •  It does not have schema.
     

  • Read/Write throughput is very high.
      

  •  Horizontal scalability can be achieved easily.
     

  • All of the above