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

Big Data Interview Questions

Questions Answers Views Company eMail

What is Apache Spark and what are the benefits of Spark over MapReduce?

282

What are the cases where Apache Spark surpasses Hadoop?

285

What is the bottom layer of abstraction in the Spark Streaming API ?

801

Which the fundamental data structure of Spark

315

List the advantage of Parquet file in Apache Spark?

462

What does map transformation do? Provide an example.

319

What are the different ways of representing data in Spark?

270

What are the features of Spark?

293

What are shared variables in Apache Spark?

329

What are the various libraries available on top of Apache Spark?

316

Explain the operations of Apache Spark RDD?

288

What are the limitations of Apache Spark?

283

State the difference between persist() and cache() functions.

321

What is Directed Acyclic Graph(DAG)?

312

What are Actions? Give some examples.

319

Un-Answered Questions { Big Data }

Explain how can you check whether namenode is working beside using the jps command?

443

On what basis name node distribute blocks across the data nodes in HDFS?

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

712

List the files associated with metadata in hdfs?

What is Output Format in MapReduce?

704

What is the most widely used API Write Data to Cassandra ?

Define actions in spark.

2244

Differentiate between describe and describe extended?

710

Why is space not freed up when I issue drop table?

Why do people use spark?

274

what are the nodes in the Hadoop cluster?

1053

Differentiate between the terms: node, a cluster, and data center in cassandra?

What is a dataset? What are its advantages over dataframe and rdd?

297

What do you understand by bloom filter in cassandra?

What is anti-entropy?

For More Un-Answered { Big Data } Questions Click Here