How do I index the folllowing query in mongodb?

How do I index the folllowing query in mongodb?

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stackoverflow.com/questions/15252781/​how-do-i-index-the... - Cached

FAQ: MongoDB for Application Developers - The MongoDB 2.4 Manual
As a client program assembles a query in MongoDB, ... How do I query for
fields that have ... or that change the indexed field on the index used by
the query; ...
docs.mongodb.org/manual/faq/developers - Cached

MongoDB
MongoDB (from "humongous") ... Full Index Support ... Rich, document-based
queries. Fast In-Place Updates ...
www.mongodb.org - Cached

Indexing Overview - The MongoDB 2.4 Manual
The following queries would then use that index, ... Do not confuse sparse
indexes in MongoDB with block-level indexes in other databases.
docs.mongodb.org/manual/core/indexes - Cached

How do I ensure index on first element of an array in MongoDB ...
the following query works as expected when there is no index ... I do not
understand what is happening here, ... (MongoDB demands an index for this)
stackoverflow.com/questions/9485584/how-​do-i-ensure... - Cached

Unleashing the power of geospatial indexing with Scala and ...
Right now I'm following some geospatial tweets and came across an
interesting one about a new option to add a geospatial index to a MongoDB.
... do a geospatial query:
blog.xebia.com/2010/03/28/mongodb-​geospatial-index - Cached

Comparing MongoDB, MySQL, and TokuMX Data Layout | Tokutek
... whereas MongoDB is schemaless. Let's look at an example. In MongoDB,
we can do the following: ... Query OK, 0 rows affected (0.02 ... index on
"a", MongoDB ...
www.tokutek.com/2013/07/comparing-​mongodb-mysql-and... - Cached

The MongoDB NoSQL Database Blog
MongoDB (from 'humongous') ... The following query finds the states with
the highest average delays, ... with the index, the query finished in less
than 5 seconds ...
blog.mongodb.org - Cached

Spring Data MongoDB - Reference Documentation
... Analyzing class class org.spring.example.Person for index information.
DEBUG work.data.mongodb ... the following query ... for MongoDB. What do
you ...
static.springsource.org/spring-data/​data-document/docs/... - Cached

MongoDB Indexes and Indexing • myNoSQL
But how do you define indexes in MongoDB? ... it's time to have some fun
with MongoDB queries and indexes! ... MongoDB Index and Indexing ...
nosql.mypopescu.com/post/1312926692 - Cached