Apache Solr Interview Questions For Freshers & Experienced

  • Question 1) Please Explain what is Apache Solr?
  • Question 2) Enlist some advantage of Apache Solr?
  • Question 3) What is Solr Cloud?
  • Question 4) What is request handler in Solr?
  • Question 5) Explain the internal architecture of Apache solr?
  • Question 6) What is Apache lucene?
  • Question 7) List few difference between Apache Solr and Lucene?
  • Question 8) What is Apache Solr Core?
  • Question 9) What configuration files are available in Apache Solr?
  • Question 10) What are streaming expressions in Apache Solr?
  • Question 11) List few difference between Apache Solr and Apache Drill?
  • Question 12) Do we need different server to run Solr?
  • Sharad Jaiswal
  • 03rd Oct, 2019
  • 555 Followers

Apache Solr Interview Questions
Updated ON

03rd Oct, 2019

No. of Questions

12

Posted In

Search Engines

Author

Sharad Jaiswal

Apache Solr Interview Questions

Q1. Please Explain what is Apache Solr?

Apache Solr is the server that is Open source basically used for the construct search applications.

It is released very recently on 29 December 2019, developer of Apache Solr is Apache Software Foundation.Some operations which are performed by the Apache Solr are:- indexing, querying, mapping, ranking the outcome.

Apache Solr has the following important features:-

  • Faceted Search and Filtering
  • Batch and Streaming processing
  • Allows you to perform a multilingual Keyword search
  • Automatic Load Balancing
  • Comprehensive HTML Admiration Interfaces
  • Recommendations & Spell Suggestions are supported

Q2. Enlist some advantage of Apache Solr?

Apache Solr seems to be focused on E-commerce. Advantages of Apache Solr is XML, HTTP, real-time indexing, auto failover, auto-recovery, flexible with XML configuration.

Applications of Apache Solr are:-

  • DuckDuckGo
  • Replace fast or Google search
  • Drupal integration
  • Loggly
  • Future
  • Auto suggestions

Q3. What is Solr Cloud?

SolrCloud — it's a distributed design centered on horizontal scaling wherever multiple nodes run an instance of solr that communicate with one another through zookeeper.

Here are some terminologies used by the SolrCloud are:-

  • cluster
  • node
  • leader
  • collection
  • shard
  • transaction log
  • partition
  • replication factor

Q4. What is request handler in Solr?

Request Handler processes request coming back to Solr. These may be question requests or index update requests.

It is a Solr plugin that is used to explain the logic carry out for any appeal. It is based on the requirements.

Q5. Explain the internal architecture of Apache solr?

The architecture of the Apache Solr contains the following components.

Request Handler - It handles all the requests sent to the Apache Solr. These requests are mainly queries sent to request or update.

Search Component - This is the search component for doing spell checking, query, hit highlighting, faceting, etc.

Query Parser - This component verifies the queries for syntactical errors.

Response Writer - This component generates the required formatted output for the user queries.

Analyzer - It examines the text fields and generates a token stream.

Update Request Processor - This is a set of plugins that includes signature, logging, and indexing. All the update requests are sent to this item, and modifications are performed on it such as dropping, adding a field, etc.

Q6. What is Apache lucene?

Apache Lucene is developed by the Apache software foundation released on December 29, 2019. Written in JAVA language.

In Lucene application program interface (API) remains the same in every case whatever format of the file.

The main components of Apache Lucene are:- Lucene Core, PyLucene, Solr, Open Relevance Project.

There are some Lucene-based projects given below:-

  • Apache Nutch
  • Apache Solr
  • Swiftype
  • Kinosearch
  • CrateDB
  • Compass

Q7. List few difference between Apache Solr and Lucene?

Apache Solr is a standalone predefined web app which follows Lucene. While Lucene is a low-level library of JAVA that is used for implementing searching, indexing, etc.

Functions of Solr are:-

  • Hit highlighting
  • Replication
  • XML/HTTP and JSON APIs
  • Web administration interface
  • Caching
  • Faceted Search and Filtering etc

Functions of Lucene are:-

  • Scalable
  • High-Performance
  • Indexing
  • Powerful
  • Accurate
  • Efficient Search Algorithm
  • Cross-Platform Solution

Q8. What is Apache Solr Core?

Collection per Server is called a core.

Apache Solr Core contains all the Solr configuration, first of all, we need to do the operations like indexing, analyzing.

The core is that a part of the server that runs one assortment.

Q9. What configuration files are available in Apache Solr?

The configuration files are available in the XML format. The solrconfig. xml file is that the configuration file with the foremost parameters touching Solr itself.

Q10. What are streaming expressions in Apache Solr?

The streaming expression is used to provide the best streaming processing language for Solr cloud.

Some functions are given below:-

  • Fast interactive MapReduce
  • Streaming NLP
  • Aggregations Publish/subscribe messaging
  • Request/response stream processin
  • Anomaly detection

Q11. List few difference between Apache Solr and Apache Drill?

Few differences between Apache Solr and Apache Drill are:-

  • Apache drill is an RDBMS while Solr is a search engine.
  • Both are open source.
  • Apache drill supports only C++ while Solr supports .Net, Java, JavaScript, PHP, Perl, Python, Ruby, etc.
  • Apache Drill is a free SQL Query engine while solr is a widely used search engine based on Apache Lucene.

Q12. Do we need different server to run Solr?

Yes however we don't need any different server when you want to run Solr at the local level & you can run it very easily if someone not required high availability.

In different cases, the no. of servers are also different, like if you want to improve the response time bit required. For bit more servers required.

About Author :

  • Author of Apache Solr Interview Questions

    Sharad Jaiswal

    Sharad Jaiswal is Sr. Web Developer from Noida area. He have rich experience in PHP, Angular Js, React, javascript and Node .If you any query or project on these programming you can drop your enquiry in comment section.

Leave A Comment :

Valid name is required.

Valid name is required.

Valid email id is required.