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

Big Data Interview Questions

Questions Answers Views Company eMail

Why hbase is a schema-less database?

184

What is the use of ycsb?

173

what are the key components of hbase?

173

name few other popular column oriented databases like hbase.

203

What is hfile ?

291

Is hbase an os independent approach?

189

How can you make sure of logical grouping of cells in the hbase?

203

Mention how many operational commands in hbase?

288

What is the role of zookeeper in hbase?

185

When should you use a reducer?

630

Can you tell us how many daemon processes run on a hadoop system?

595

Difference between mapreduce and spark

688

What is identity mapper and identity reducer?

644

What is heartbeat in hdfs? Explain.

681

What is identity mapper and chain mapper?

669

Un-Answered Questions { Big Data }

How many types of rdd are there in spark?

316

What are the different file permissions in the HDFS for files or directory levels?

146

Explain Accumulator in Spark?

433

What happens when two users try to access to the same file in HDFS?

Is the keyword ‘FUNCTIONAL’ a User Defined Function (UDF)?

552

What is Input Split in hadoop?

982

What are the main key structures of hbase?

167

What is spark reducebykey?

268

Explain what is zookeeper in kafka? Can we use kafka without zookeeper?

537

What purpose would an engineer use spark?

407

What do you know about Partition in Kafka?

659

Define durable writes?

How many Mappers run for a MapReduce job?

609

How many partitions are created by default in Apache Spark RDD?

307

What is a Secondary Namenode? Is it a substitute to the Namenode?

1032

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