Apache Solr Interview Questions

by Azhar Uddin Technical Architect

If you're looking for Apache Solr Interview Questions & Answers for Experienced or Freshers, you are at right place. There are lot of opportunities from many reputed companies in the world. According to research Apache Solr has a market share of about 35%. So, You still have opportunity to move ahead in your career in Apache Solr Development. Mindmajix offers Advanced Apache Solr Interview Questions 2018 that helps you in cracking your interview & acquire dream career as Apache Solr Developer.

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Q. WHAT IS APACHE SOLR?
Apache Solr is a standalone full-text search platform to perform searches on multiple websites and index documents using XML and HTTP. Built on a Java Library called Lucence, Solr supports a rich schema specification for a wide range and offers flexibility in dealing with different document fields. It also consists of an extensive search plugin API for developing custom search behavior.

Q. WHAT FILE CONTAINS CONFIGURATION FOR DATA DIRECTORY?
Solrconfig.xml file contains configuration for data directory.

Q. WHAT FILE CONTAINS DEFINITION OF THE FIELD TYPES AND FIELDS OF DOCUMENTS?
schema.xml file contains definition of the field types and fields of documents.

Q. WHAT ARE THE FEATURES OF APACHE SOLR?

Allows Scalable, high performance indexing Near real-time indexing
Standards-based open interfaces like XML, JSON and HTTP
Flexible and adaptable faceting
Advanced and Accurate full-text search
Linearly scalable, auto index replication, auto failover and recovery
Allows concurrent searching and updating
Comprehensive HTML administration interfaces
Provides cross-platform solutions that are index-compatible

Q. WHAT IS APACHE LUCENE?
Supported by Apache Software Foundation, Apache Lucene is a free, open-source, high-performance text search engine library written in Java by Doug Cutting. Lucence facilitates full-featured searching, highlighting, indexing and spellchecking of documents in various formats like MS Office docs, HTML, PDF, text docs and others.

Q. WHAT IS REQUEST HANDLER?
When a user runs a search in Solr, the search query is processed by a request handler. SolrRequestHandler is a Solr Plugin, which illustrates the logic to be executed for any request.Solrconfig.xml file comprises several handlers (containing a number of instances of the same SolrRequestHandler class having different configurations).

Q. WHAT ARE THE ADVANTAGES AND DISADVANTAGES OF STANDARD QUERY PARSER?
Also known as Lucence Parser, the Solr standard query parser enables users to specify precise queries through a robust syntax. However, the parser’s syntax is vulnerable to many syntax errors unlike other error-free query parsers like DisMax parser.

Q. WHAT IS THE USE OF FIELD TYPE?
Field type defines how Solr would interpret data in a field and how that field can be queried.

Q. WHAT ALL INFORMATION IS SPECIFIED IN FIELD TYPE?
A field type includes four types of information:

Name of field type
Field attributes
An implementation class name
If the field type is Text Field , a description of the field analysis for the field type.

Q.EXPLAIN FACETING IN SOLR.
As the name suggests, Faceting is the arrangement and categorization of all search results based on their index terms. The process of faceting makes the searching task smoother as users can look for the exact results.

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