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

Big Data Interview Questions

Questions Answers Views Company eMail

How does hdfs provides good throughput?

Can we have different replication factor of the existing files in hdfs?

How will you perform the inter cluster data copying work in hdfs?

Suppose there is file of size 514 mb stored in hdfs (hadoop 2.x) using default block size configuration and default replication factor. Then, how many blocks will be created in total and what will be the size of each block?

125

List the files associated with metadata in hdfs?

Define data integrity? How does hdfs ensure data integrity of data blocks stored in hdfs?

What is a rack awareness algorithm and why is it used in hadoop?

What is a block?

What is throughput? How does hdfs provides good throughput?

Replication causes data redundancy and consume a lot of space, then why is it pursued in hdfs?

Define hadoop archives? What is the command for archiving a group of files in hdfs.

What do you mean by the high availability of a namenode?

What is the difference between nas (network attached storage) and hdfs?

What is a rack awareness algorithm?

What is the problem in having lots of small files in hdfs?

Un-Answered Questions { Big Data }

Explain about hlog and wal in hbase.

305

What is keyspace in Cassandra?

While installing, why does apache have three config files - srm.conf, access.conf and httpd.conf?

571

Name three data source available in SparkSQL

307

Explain what is hadoop?

434

can you run Apache Spark On Apache Mesos?

311

Can kafka be utilized without zookeeper?

515

What is bag data type in Pig?

678

What is the use of coordinator node in read?

What is data processing in big data?

692

What are the capabilities of kafka?

553

Explain the lookup() operation in Spark?

231

Are job tracker and task trackers present in separate machines?

462

what is the difference between order by and sort by in Hive?

703

How can one set space quota in Hadoop (HDFS) directory?

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