Apache Impala Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Impala Interview Questions

Questions Answers Views Company eMail

How does impala compare to hive and pig?

How does impala achieve its performance improvements?

Can I use impala to query data already loaded into hive and hbase?

What happens when the data set exceeds available memory?

How much memory is required?

Are results returned as they become available, or all at once when a query completes?

Why do I have to use refresh and invalidate metadata, what do they do?

Why does my select statement fail?

Does impala performance improve as it is deployed to more hosts in a cluster in much the same way that hadoop performance does?

164

Can I do transforms or add new functionality?

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

Is avro supported?

Un-Answered Questions { Apache Impala }

Can impala be used for complex event processing?

169

What impala use for authentication?

Can I do insert … select * into a partitioned table?

Can I do trforms or add new functionality?

How to call impala built-in functions?

What are the differences between relational databases and impala?

Why do I have to use refresh and invalidate metadata, what do they do?

What are impala built-in functions?

Is avro supported?

What is used to store data generally?

How does impala compare to hive and pig?

What is the maximum number of rows in a table?

What size is recommended for each node?

214

How does impala process join queries for large tables?

Why does my insert statement fail?

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