Hadoop interview questions part 30
Hadoop interview questions part 30
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Total Questions: 20
1. ______________ is method to copy byte from input stream to any other stream in Hadoop.
Correct Answer is : IOUtils
2. _____________ is used to read data from bytes buffers .
Correct Answer is : write()
3. Point out the wrong statement :
Correct Answer is : The output of the Reducer is re-sorted
4. Interface ____________ reduces a set of intermediate values which share a key to a smaller set of values.
Correct Answer is : Reducer
5. Reducer is input the grouped output of a :
Correct Answer is : Mapper
6. The output of the reduce task is typically written to the FileSystem via :
Correct Answer is : OutputCollector
7. Applications can use the _________ provided to report progress or just indicate that they are alive.
Correct Answer is : Reporter
8. Which of the following parameter is to collect keys and combined values ?
Correct Answer is : output
9. Kafka is comparable to traditional messaging systems such as :
Correct Answer is : ActiveMQ
10. Point out the correct statement :
Correct Answer is : All of the mentioned
11. Many people use Kafka as a replacement for a ___________ solution.
Correct Answer is : log aggregation
12. _______________ is a style of application design where state changes are logged as a time-ordered sequence of records.
Correct Answer is : Event sourcing
13. Point out the wrong statement :
Correct Answer is : All of the mentioned
14. Kafka uses __________ so you need to first start a ZooKeeper server if you don’t already have one.
Correct Answer is : Zookeeper
15. __________ is the node responsible for all reads and writes for the given partition.
Correct Answer is : leader
16. __________ is the subset of the replicas list that is currently alive and caught-up to the leader.
Correct Answer is : isr
17. Kafka uses key-value pairs in the ____________ file format for configuration.
Correct Answer is : Property
18. __________ is the amount of time to keep a log segment before it is deleted.
Correct Answer is : log.retention
19. __________ provides the functionality of a messaging system.
Correct Answer is : Kafka
20. Point out the correct statement :
Correct Answer is : A topic is a category or feed name to which messages are published
