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?

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 }

What load do concurrent queries produce on the namenode?

What happens when the data set exceeds available memory?

Can impala do user-defined functions (udfs)?

How do I configure hadoop high availability (ha) for impala?

Is impala intended to handle real time queries in low-latency applications or is it for ad hoc queries for the purpose of data exploration?

What size is recommended for each node?

172

What is impala data types?

Why does my insert statement fail?

How to call impala built-in functions?

Can impala be used for complex event processing?

156

What is the no. Of threads created by impala?

What features from relational databases or hive are not available in impala?

Compare hive, hbase, and impala?

What is impala?

128

How do I try impala out?

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