Apache Storm Interview Questions and Answers

Apache Storm Interview Questions and Answers

Apache Storm, in easy terms, is a distributed framework for real time process of massive data like Apache Hadoop is a distributed framework for batch processing. Apache Storm works on task similarity principle wherever within the same code is executed on multiple nodes with totally different input data.

Apache Storm adds reliable real-time data processing capabilities to Enterprise Hadoop. Storm on YARN is powerful for scenarios requiring real-time analytics, machine learning and continuous monitoring of operations. It is originally created by Nathan Marz and team at BackType, the project was open sourced after being acquired by Twitter. It uses custom created “spouts” and “bolts” to define information sources and manipulations to allow batch, distributed processing of streaming data. The initial release was on 17 September 2011.

A Storm application is meant as a “topology” within the form of a directed acyclic graph (DAG) with spouts and bolts acting because the graph vertices. Edges on the graph are named streams and direct data from one node to a different. Together, the topology acts as a data transformation pipeline. At a superficial level the general topology structure is similar to a MapReduce job, with the main difference being that data is processed in real time as opposed to in individual batches. Additionally, Storm topologies run indefinitely until killed, while a MapReduce job DAG must eventually end.

What is Apache storm?

Why use Apache Storm?

Explain the major components of Apache Storm system?

What are the components of Apache Storm?

Can you explain the Spout Creation?

Can you define stream and stream grouping in Apache Storm?

Can you explain the common configurations in Apache Storm?

Explain how Storm UI can be used in topology?

Define combiner aggregator in Apache Storm?

Can we run Apache as a root? If yes, what are the security risks?

Explain how you can streamline log files using Apache storm?

When should you call the clean-up method?

Can you define Toplogy_Message_Timeout_secs in Apache storm?

In which folder are Java Applications stored in Apache?

Can you define Multiviews?

Can you define ZeroMQ?

What are the distinct layers of Storm’s Codebase?

Can you define mod_vhost_alias?

Can you define struct?

Can you explain the difference between raw data and processed data?

What is data integrity and what are the methods available to reduce threats to it?

Explain the difference between Apache Kafka and Apache Storm?

Does Apache act as a Proxy server?

How to check for the httpd.conf consistency and any errors in it?

How to stop Apache?

Can you explain Distributed Messaging System?

Can you explain combinerAggregator?

Can you define Trident?

What are the benefits of Apache Storm?