CASSANDRA QUIZ DESCRIPTION

Job tracker runs on

  • Namenode
      

  • Secondary datanode
      

  • Datanode
     

  • Secondary namenode

Which technologies is a document store database?

  •  Cassandra
      

  • CouchDB
     

  • HBase
       

  • Hive

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

  • archiveName
     

  • destination
        

  • source
     

  • None of these

Hadoop is open source.

  •  True only for Apache Hadoop
      

  • True only for Apache and Cloudera Hadoop.
     

  • Always True
     

  • Always False

The core principle of nosql is __________.

  • Low availability
       

  • High availability
       

  • Both A and B
     

  • None of the above

Can NoSQL replace SQL?

  • Yes

  • No

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

  •  ~50
      

  • ~150
      

  • ~5s
      

  • ~15

When a file in HDFS is deleted by a user

  • It is lost forever
     

  • It goes to trash if configured.
     

  • File sin HDFS cannot be deleted
     

  • It becomes hidden from the user but stays in the file systemB

In which year NoSQL was released

  • 1996
     

  • 1997
     

  • 1998
     

  • 1999

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.

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

  • HDFS federation
       

  • Erasure coding
      

  • High availability
     

  • None of these

Which of the following license is Hadoop distributed under ?

  • Middleware
     

  • Apache License 2.0
     

  • Shareware
       

  • Mozilla

Which of the following genres does Hadoop produce ?

  • Distributed file system
      

  • JSP
     

  • JAX-RS
       

  • Java Message Service

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

  • Row
     

  •  Column
     

  • Both A and B
     

  •  None of the above

fetchdt command is not used to check for various inconsistencies.

  • True

  • False

Which architecture does NoSQL follow?

  •  Shared Memory
      

  • Shared Nothing
     

  • Shared Disk
        

  • Shared Nothing Architecture

 Which of the following is not a strong feature for NoSQL databases?

  • Scalability
      

  • Relational data
     

  • Faster data access than RDBMS.
     

  • All of the above

What do you mean by data locality feature in Hadoop?

  •  Co-locate the data with the computing nodes.
     

  • Store the same data across multiple nodes.
     

  • Distribute the data across multiple nodes.
      

  • Relocate the data from one node to another.

 CQL stands for?
 

  • Cassandra Query Language
     

  • Cluster Query Language
     

  • Commit Query Language
     

  • Component Query Language

 Which of the following is a primary classification for nosql architectures

  • Document & Graph Database
      

  • Key / value database
       

  • column-oriented database
     

  • All of the Above

Cassendra is a?

  • Centralised database
     

  • End-user database
     

  • NoSQL database
     

  •  Relational database

 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 method builds the cluster with the given contact points?

  • ResultSet execute()
     

  • Session connect()
     

  • Cluster build()
     

  • Cluster.Builder addContactPoint()

Select the default size of distributed cache?

  • 10 GB
      

  • 15 GB
     

  • 13 GB
       

  • 11 GB

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

  • Network
      

  • Relational
     

  • Distributed
     

  • None of the above

List the different kinds of NoSQL data stores?

  •  Key-value store
     

  • Column family store
      

  • Graph store
     

  • All of the above

Programming language used in cassendra?
 

  • C
     

  • Java
     

  • C++
     

  • Net

What was hadoop written in?

  • Perl
      

  • Java (software platform)
       

  • Lua (programming language)
      

  • Java (programming language)

Choose the right advantage of 3x replication schema in Hadoop?

  • Fault tolerance
     

  • Reliability
      

  • High availability
       

  • All of the above

Hive also support custom extensions written in ___________ .

  • C
      

  • Java
     

  • C#
        

  • C++