Hadoop Mock Test 2 - Sanfoundry

10%

Question 1 of 10

1. The ________ option allows applications to add jars to the classpaths of the maps and reduces.

optionname

-archives

all of the mentioned

-libjars

Question 1 of 10

Question 2 of 10

2. __________ tools is used to generate proxy objects in Java to easily work with the objects.

MapReduce

Avro

Lucene

kafka

Question 2 of 10

Question 3 of 10

3. Which of the following is based on the DEFLATE algorithm?

Gzip

All of the mentioned

Bzip2

LZO

Question 3 of 10

Question 4 of 10

4. Point out the correct statement.

All of the mentioned

Including schemas with the Avro messages allows any application to deserialize the data

The serialized data is in a compact binary format that doesn't require proxy objects or code generation

Apache Avro is a framework that allows you to serialize data in a format that has a schema built in

Question 4 of 10

Question 5 of 10

5. The ____________ is an iterator which reads through the file and returns objects using the next() method.

DatumReader

None of the mentioned

DatumRead

DatReader

Question 5 of 10

Question 6 of 10

6. Point out the correct statement.

None of the mentioned

Data locality means movement of the algorithm to the data instead of data to algorithm

When the processing is done on the data algorithm is moved across the Action Nodes rather than data to the algorithm

Moving Computation is expensive than Moving Data

Question 6 of 10

Question 7 of 10

7. Which of the following supports splittable compression?

LZO

Bzip2

Gzip

All of the mentioned

Question 7 of 10

Question 8 of 10

8. Point out the wrong statement.

None of the mentioned

The Hadoop archive exposes itself as a file system layer

Hadoop archives are immutable

Archive rename, deletes and creates return an error

Question 8 of 10

Question 9 of 10

9. Point out the wrong statement.

The intermediate, sorted outputs are always stored in a simple (key-len, key, value-len, value) format

The total number of partitions is the same as the number of reduce tasks for the job

None of the mentioned

The Mapper outputs are sorted and then partitioned per Reducer

Question 9 of 10

Question 10 of 10

10. Gzip (short for GNU zip) generates compressed files that have a _________ extension.

.gz

.gzp

.gzip

Question 10 of 10