Apache Solr is the popular, blazing fast open source enterprise search platform from the Apache Lucene project. Its major features include powerful full-text search, hit highlighting, faceted search, dynamic clustering, database integration, rich document handling, and geospatial search. Solr is highly scalable, providing distributed search and index replication, and it powers the search and navigation features of many of the world's largest internet sites.

Solr maxDox and numDocs

Multiple choice question

When seeing the maxDoc and numDocs, sometimes you will find they does not match the number each other.

Please select the reason below.

solr optimization

Multiple choice question

If you repeated committing the index, the performance of searching would be degrading. When you would like to optimize your index by curl or from browser, what kind of parameter is needed?



Solr tLog

Short answer question

From Solr 4.0 it is embedded "tLog" directory. If you would not like to make "tLog" directory, which of sentences should be commented out in solrconfig.xml?

autoCommit in solr

Short answer question

When you would like to set autoCommit depending on the number of documents, what do you need to describe in solrconfig.xml?

What is this parameter in Solr?

Short answer question

What the word of parameter is mentioned with this explanation?


When a new searcher is opened, its caches may be prepopulated with cached object from caches in the old searcher. This parameter is the number of the parameter that will be regenerated in the new searcher. You will proably want to base this parameter setting on how long it takes to be prepopulated.

Simple Apache Solr quiz

Attempts allowed:Unlimited
Pass rate:75 %
Backwards navigation:Allowed

Solr quiz about settings and configuring Solr.

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Solr commit

True/false question

The transaction of Solr is little bit different from RDMS. For example other user add the index A and not commit it, and then you commit it , is it possible for you to search index A ?

Apache Solr Highlighting

Multiple choice question

Solr highlighting returns relevent snippets of each returned document, and highlights terms from the query within those context snippets.
Querying with highlight on (hl=true) causes a highlighting section to be added to the response with the words to highlight surrounded with <em> (for emphasis) tags.
In order for a field may be highlighted, which properties must this field have?

Solr synonyms

Multiple choice question

When using searching system, you would like to use the synonym function. It could be better if you get good result when searching with mistyping word. For example, it is good if you get the documents containing the word of "google" when searching with the "gooogle" (adding one more "o").

For replacing the "gooogle" with the "google" at the timing of indexing, what kind of statement is needed in synonyms.txt?

How can you sort on a field that you do want to be tokenized for searching

Multiple choice question

Sorting in Solr can be done on the "score" of the document, or on any multiValued="false" indexed="true" field provided that field is non-tokenized (ie: has no Analyzer).
How can you sort on a field that you do want to be tokenized for searching?

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