Hadoop Online Quiz

Q 1 - HDFS block size is larger as compared to the size of the disk blocks so that

A - Only HDFS files can be stored in the disk used.

B - The seek time is maximum

C - Transfer of a large files made of multiple disk blocks is not possible.

D - A single file larger than the disk size can be stored across many disks in the cluster.

Q 2 - The main goal of HDFS High availability is

A - Faster creation of the replicas of primary namenode.

B - To reduce the cycle time required to bring back a new primary namenode after existing primary fails.

C - Prevent data loss due to failure of primary namenode.

D - Prevent the primary namenode form becoming single point of failure.

Q 3 - The default replication factor for HDFS file system in hadoop is

A - 1

B - 2

C - 3

D - 4

Q 4 - Which of the below property gets configured on core-site.xml ?

A - Replication factor

B - Directory names to store hdfs files.

C - Host and port where MapReduce task runs.

D - Java Environment variables.

Q 5 - The Zookeeper

A - Detects the failure of the namenode and elects a new namenode.

B - Detects the failure of datanodes and elects a new datanode.

C - Prevents the hardware from overheating by shutting them down.

D - Maintains a list of all the components IP address of the Hadoop cluster.

Q 6 - YARN stands for

A - Yahoo’s another resource name

B - Yet another resource negotiator

C - Yahoo’s archived Resource names

D - Yet another resource need.

Q 7 - The comman used to copy a directory form one node to another in HDFS is

A - rcp

B - dcp

C - drcp

D - distcp

Q 8 - The number of tasks a task tracker can accept depends on

A - Maximum memory available in the node

B - Not limited

C - Number of slots configured in it

D - As decided by the jobTracker

Q 9 - What is distributed cache?

A - The distributed cache is special component on name node that will cache frequently used data for faster client response. It is used during reduce step.

B - The distributed cache is special component on data node that will cache frequently used data for faster client response. It is used during map step.

C - The distributed cache is a component that caches java objects.

D - The distributed cache is a component that allows developers to deploy jars for Map-Reduce processing.

Q 10 - Which one of the following is not a main component of HBase?

A - Region Server.

B - Nagios.

C - ZooKeeper.

D - Master Server.