Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)

Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)

Hadoop Interview Questions

Questions Answers Views Company eMail

What does heartbeat in hdfs means?

What does hdfs mean?

Would you be able to change the block size of hdfs files?

Characterize data integrity? How does hdfs ensure information integrity of data blocks squares kept in hdfs?

Does hdfs enable a customer to peruse a record, which is already opened for writing?

What is the throughput?

How does hdfs give great throughput?

Will various customers write into an hdfs record simultaneously?

Clarify the difference between nas and hdfs.

What do you mean by meta information in hdfs?

Can we change the document present in hdfs?

What does rack awareness algorithm means and why is it utilized as a part of hadoop?

477

What does rack awareness algorithm means?

528

What does the high availability of a name-node means? How is it accomplished?

446

What does name-node mean in hadoop?

511

Un-Answered Questions { Hadoop }

What is heartbeat in hdfs?

702

Define the use of Source Command in Cassandra?

What is SerDe in Apache Hive ?

972

Explain Spark join() operation?

296

explain Metadata in Namenode?

981

How is Flume-NG different from Flume 0.9?

While loading data into a hive table using the load data clause, how do you specify it is a hdfs file and not a local file ?

767

How data or file is written into HDFS?

Is it possible to search for files using wildcards?

691

What are the ways to launch Apache Spark over YARN?

298

What is the key- value pair in MapReduce?

838

What are common spark ecosystems?

336

What do you understand by snitches?

Can I run an ensemble cluster behind a load balancer?

If the source data gets updated every now and then, how will you synchronize the data in hdfs that is imported by sqoop?

162

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