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

Big Data Interview Questions

Questions Answers Views Company eMail

Describe HDFS Federation?

What is active and passive NameNode in HDFS?

228

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

How data or file is read in Hadoop HDFS?

How HDFS helps NameNode in scaling in Hadoop?

What is Fault Tolerance in Hadoop HDFS?

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

What is a Block Scanner in HDFS?

Differentiate HDFS & HBase?

How data or file is written into Hadoop HDFS?

In HDFS, how Name node determines which data node to write on?

What is Secondary NameNode in Hadoop HDFS?

How to restart NameNode or all the daemons in Hadoop HDFS?

Why HDFS performs replication, although it results in data redundancy in Hadoop?

Can multiple clients write into a Hadoop HDFS file concurrently?

Un-Answered Questions { Big Data }

What does rack awareness mean?

418

How do you specify the table creator name when creating a table in hive?

701

Why cloudera is used?

481

How one can format Hadoop HDFS?

Explain partitions?

280

How to get the single file as the output from MapReduce Job?

636

How does yarn work with spark?

291

Describe Partition and Partitioner in Apache Spark?

305

What are the benefits yarn brings in to hadoop?

430

Is hadoop still in demand?

456

When does queuefullexception occur?

655

Can we deploy job tracker other than name node?

684

What is the difference between Column and SuperColumn?

150

What is mlib?

293

Name different types of primary keys in Cassandra?

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