Hadoop Mock Test 4 - Sanfoundry

10%

Question 1 of 10

1. Which hdfs command is used to check for various inconsistencies?

fetchdt

fsk

none of the mentioned

fsck

Question 1 of 10

Question 2 of 10

2. ___________ mode allows you to suppress alerts for a host, service, role, or even the entire cluster.

Safe

Maintenance

Secure

All of the mentioned

Question 2 of 10

Question 3 of 10

3. __________ mode is a Namenode state in which it does not accept changes to the name space.

None of the mentioned

Recover

Rollback

Safe

Question 3 of 10

Question 4 of 10

4. Which of the following operator executes a shell command from the Hive shell?

Question 4 of 10

Question 5 of 10

5. __________ is a variant of SequenceFileInputFormat that converts the sequence file’s keys and values to Text objects.

SequenceFile

All of the mentioned

SequenceAsTextInputFormat

SequenceFileAsTextInputFormat

Question 5 of 10

Question 6 of 10

6. Point out the wrong statement.

SequenceFileAsTextInputFormat is a variant of SequenceFileInputFormat that retrieves the sequence file’s keys and values as opaque binary objects.

SequenceFileAsBinaryInputFormat is a variant of SequenceFileInputFormat that retrieves the sequence file’s keys and values as opaque binary objects

None of the mentioned

Hadoop sequence file format stores sequences of binary key-value pairs

Question 6 of 10

Question 7 of 10

7. The key, a ____________ is the byte offset within the file of the beginning of the line.

ShortReadable

LongWritable

LongReadable

All of the mentioned

Question 7 of 10

Question 8 of 10

8. Point out the correct statement.

The Pig load/store API is aligned with Hadoop InputFormat class only

LoadPush has methods to push operations from Pig runtime into loader implementations

LoadMeta has methods to convert byte arrays to specific types

All of the mentioned

Question 8 of 10

Question 9 of 10

9. Point out the wrong statement.

Putting a component into maintenance mode prevent events from being logged

None of the mentioned

If you set the HBase service into maintenance mode, then its roles (HBase Master and all Region Servers) are put into effective maintenance mode

If you set a host into maintenance mode, then any roles running on that host are put into effective maintenance mode

Question 9 of 10

Question 10 of 10

10. Point out the correct statement.

The minimum split size is usually 1 byte, although some formats have a lower bound on the split size

All of the mentioned

The maximum split size defaults to the maximum value that can be represented by a Java long type

Applications may impose a minimum split size

Question 10 of 10