In hdfs the distributed cache is used in which of the

22. In HDFS the Distributed Cache is used in which
of the following
a. Mapper phase only
b. Reducer phase only
c. In either phase, but not on both sides
simultaneously
d. In either phase
Answer: d
23. Which of the following type of joins can be
performed in Reduce side join operation?
24. A Map reduce function can be written: 25. In the map is there any input format? 26. Which MapReduce phase is theoretically able to utilize features of the underlying file system in order to
optimize parallel execution?
a. Split
b.Map
c. Combine
d.Reduce
Answer: a
-21

22
27. Which method of the FileSystem object is used
for reading a file in HDFS
28. The world’s largest Hadoop cluster. 29. The Big Data Tackles Facebook are based on
on________ Hadoop.
30. Which SequenceFile are present in Hadoop I/O
?
a. 2
b. 8
c. 9
d. 3
Answer: c
31. slowest compression technique is ______ 32. Which of the following is a typically
compresses files which are best available
techniques.10% to 15 %.
33. Which of the following is provides search
technology? and Java-based indexing
34. Are defined with Avro schemas _____
a. JAVA
b. XML

c. All of the mentioned
d. JSON
Answer: d
35. _________ of the field is used to Thrift
resolves possible conflicts.