Q 1 - The concept using multiple machines to process data stored in distributed system is not new.

The High-performance computing (HPC) uses many computing machines to process large volume of data stored in a storage area network (SAN). As compared to HPC, Hadoop

A - Can process a larger volume of data.

B - Can run on a larger number of machines than HPC cluster.

C - Can process data faster under the same network bandwidth as compared to HPC.

D - Cannot run compute intensive jobs.

Q 2 - In the local disk of the namenode the files which are stored persistently are −

A - namespace image and edit log

B - block locations and namespace image

C - edit log and block locations

D - Namespace image, edit log and block locations.

Q 3 - The property used to set the default filesystem for Hadoop in core-site.xml is-

A - filesystem.default

B - fs.default

C - fs.defaultFS

D - hdfs.default

Q 4 - The command to check if Hadoop is up and running is −

A - Jsp

B - Jps

C - Hadoop fs –test

D - None

Q 5 - The output of a mapper task is

A - The Key-value pair of all the records of the dataset.

B - The Key-value pair of all the records from the input split processed by the mapper

C - Only the sorted Keys from the input split

D - The number of rows processed by the mapper task.

Q 6 - When a backup node is used in a cluster there is no need of

A - Check point node

B - Secondary name node

C - Secondary data node

D - Rack awareness

Q 7 - The data from a remote hadoop cluster can

A - not be read by another hadoop cluster

B - be read using http

C - be read using hhtp

D - be read suing hftp

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

A - HBase

B - Avro

C - Sqoop

D - Zookeeper

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 - In order to apply a combiner, what is one property that has to be satisfied by the values emitted from the mapper?

A - Combiner can be applied always to any data

B - Output of the mapper and output of the combiner has to be same key value pair and they can be heterogeneous

C - Output of the mapper and output of the combiner has to be same key value pair. Only if the values satisfy associative and commutative property it can be done.