Q.1
A ________ serves as the master and there is only one NameNode per cluster.
  • a) Data Node
  • b) NameNode
  • c) Data block
  • d) Replication
Q.2
Point out the correct statement.
  • a) DataNode is the slave/worker node and holds the user data in the form of Data Blocks
  • b) Each incoming file is broken into 32 MB by default
  • c) Data blocks are replicated across different nodes in the cluster to ensure a low degree of fault tolerance
  • d) None of the mentioned
Q.3
HDFS works in a __________ fashion.
  • a) master-worker
  • b) master-slave
  • c) worker/slave
  • d) all of the mentioned
Q.4
________ NameNode is used when the Primary NameNode goes down.
  • a) Rack
  • b) Data
  • c) Secondary
  • d) None of the mentioned
Q.5
Point out the wrong statement.
  • a) Replication Factor can be configured at a cluster level (Default is set to 3) and also at a file level
  • b) Block Report from each DataNode contains a list of all the blocks that are stored on that DataNode
  • c) User data is stored on the local file system of DataNodes
  • d) DataNode is aware of the files to which the blocks stored on it belong to
Q.6
Which of the following scenario may not be a good fit for HDFS?
  • a) HDFS is not suitable for scenarios requiring multiple/simultaneous writes to the same file
  • b) HDFS is suitable for storing data related to applications requiring low latency data access
  • c) HDFS is suitable for storing data related to applications requiring low latency data access
  • d) None of the mentioned
Q.7
The need for data replication can arise in various scenarios like ____________
  • a) Replication Factor is changed
  • b) DataNode goes down
  • c) Data Blocks get corrupted
  • d) All of the mentioned
Q.8
________ is the slave/worker node and holds the user data in the form of Data Blocks.
  • a) DataNode
  • b) NameNode
  • c) Data block
  • d) Replication
Q.9
HDFS provides a command line interface called __________ used to interact with HDFS.
  • a) “HDFS Shell”
  • b) “FS Shell”
  • c) “DFS Shell”
  • d) None of the mentioned
Q.10
HDFS is implemented in _____________ programming language.
  • a) C++
  • b) Java
  • c) Scala
  • d) None of the mentioned
Q.11
For YARN, the ___________ Manager UI provides host and port information.
  • a) Data Node
  • b) NameNode
  • c) Resource
  • d) Replication
Q.12
Point out the correct statement.
  • a) The Hadoop framework publishes the job flow status to an internally running web server on the master nodes of the Hadoop cluster
  • b) Each incoming file is broken into 32 MB by default
  • c) Data blocks are replicated across different nodes in the cluster to ensure a low degree of fault tolerance
  • d) None of the mentioned
Q.13
For ________ the HBase Master UI provides information about the HBase Master uptime.
  • a) HBase
  • b) Oozie
  • c) Kafka
  • d) All of the mentioned
Q.14
During start up, the ___________ loads the file system state from the fsimage and the edits log file.
  • a) DataNode
  • b) NameNode
  • c) ActionNode
  • d) None of the mentioned
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