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Hadoop Interview Questions
Questions Answers Views Company eMail

What is the advantage of hadoop over java serialization?

 43

What are the disadvantages of hadoop serialization?

 34

Who is intended audience to learn avro?

 38

What is the maximum size of string data type supported by hive? Mention the hive support binary formats.

 704

What is available mechanism for connecting from applications, when we run hive as a server?

 819

If you run a select * query in hive, why does it not run mapreduce?

 792

Can we run unix shell commands from hive? Can hive queries be executed from script files? How? Give an example.

 849

What is the precedence order of hive configuration?

 983

Why hive does not store metadata information in hdfs?

 1000

Whenever we run hive query, new metastore_db is created. Why?

 731

How hive can improve performance with orc format tables?

 774

How to change the column data type in hive? Explain rlike in hive.

 750

What are the uses of explode hive?

 771

how can we access the sub directories recursively?

 849

How do we write our own custom serde?

 748

Un-Answered Questions { Hadoop }

When we create an rdd, does it bring the data and load it into the memory?

360

What is Rack Awareness? What is its need in Hadoop?

573

How to access HDFS?

56

Explain what is a task tracker in hadoop?

504

When we write a= load …, what does 'a' called?

581

What rdd stands for?

337

Is a distributed machine learning framework on top of spark?

352

What are possible types of Channel Selectors?

105

Differentiate HDFS & HBase?

52

Why scala is used in spark?

349

What is closing out ledgers?

1

Mention what are the data components used by Hadoop?

694

What are the design goals of zookeeper?

1

What is azure spark?

314

How to optimize Hadoop MapReduce Job?

680

For More Un-Answered { Hadoop } Questions Click Here