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

Big Data Interview Questions

Questions Answers Views Company eMail

Is there a date data type in Hive?

743

What do you mean by schema on reading?

713

Can a table be renamed in Hive?

735

What is throughput? How does HDFS provide good throughput?

File permissions in HDFS?

What is Hadoop HDFS – Hadoop Distributed File System?

How to change the replication factor of data which is already stored in HDFS?

What is Block in HDFS?

How to copy a file into HDFS with a different block size to that of existing block size configuration?

Can multiple clients write into an HDFS file concurrently?

Why is block size set to 128 MB in Hadoop HDFS?

107

Does HDFS allow a client to read a file which is already opened for writing?

How HDFS client divide the file into the block while storing inside HDFS?

What is the difference between Input Split and an HDFS Block?

What is NameNode and DataNode in HDFS?

Un-Answered Questions { Big Data }

Clarify how job tracker schedules an assignment?

419

What happen on the namenode when a client tries to read a data file?

461

What relational operators can we use that are related to combining and splitting in Pig language?

553

What are basic steps to be performed while working with big data?

565

Describe Accumulator in detail in Apache Spark?

314

What is a "map" in Hadoop?

797

List the languages supported by Apache Spark?

313

What is Flatten and what it do in PIG?

638

Explain what are the basic parameters of a mapper?

811

List the various HDFS daemons in HDFS cluster?

What is Text Input Format?

680

Name some companies that use Hadoop?

957

can you run Apache Spark On Apache Mesos?

312

What is the biggest shortcoming of Spark?

317

What is the reason of using hbase?

187

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