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 - Zookeeper ensures that

A - All the namenodes are actively serving the client requests

B - Only one namenode is actively serving the client requests

C - A failover is triggered when any of the datanode fails.

D - A failover can not be started by hadoop administrator.

Q 3 - Which of this is not a scheduler options available with YARN?

A - Optimal Scheduler

B - FIFO scheduler

C - Capacity scheduler

D - Fair scheduler

Q 4 - Which of the below property gets configured on hdfs-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 - Which of the below apache system deals with ingesting streaming data to hadoop

A - Ozie

B - Kafka

C - Flume

D - Hive

Q 6 - Which of the following is not a goal of HDFS?

A - Fault detection and recovery

B - Handle huge dataset

C - Prevent deletion of data

D - Provide high network bandwidth for data movement

Q 7 - The replication factor of a file in HDFS can be changed using

A - changerep

B - rerep

C - setrep

D - xrep

Q 8 - Which technology is used to store data in Hadoop?

A - HBase

B - Avro

C - Sqoop

D - Zookeeper

Q 9 - How does Hadoop process large volumes of data?

A - Hadoop uses a lot of machines in parallel. This optimizes data processing.

B - Hadoop was specifically designed to process large amount of data by taking advantage of MPP hardware.

C - Hadoop ships the code to the data instead of sending the data to the code.

D - Hadoop uses sophisticated caching techniques on name node to speed processing of data.

Q 10 -What is a Sequence File?

A - A Sequence File contains a binary encoding of an arbitrary number of homogeneous writable objects.

B - A Sequence File contains a binary encoding of an arbitrary number of heterogeneous writable objects.

C - A Sequence File contains a binary encoding of an arbitrary number of WritableComparable objects, in sorted order.

D - A Sequence File contains a binary encoding of an arbitrary number key-value pairs. Each key must be the same type. Each value must be same type.