ObjectId “52c52addead11dc51” , “egg”: ObjectId “52c52aeaead11dc55” , “hello”: Once again, you will be using the zip code collection, which you will find in the ‘handouts’ link in this page. If everything works, you should see your username when you are redirected to the welcome page. There should be , documents after restore.

ObjectId “52c54d73ead11dc58” , “fname”: The query performed a full collection scan. Limit Number of Elements in an Array after an Update: In the result set, only the item and qty fields return in the matching documents. ObjectId “52c52addead11dc51” , “egg”:

Check all that apply.

MongodbChamps: MJ: MongoDB for Java Developers Homework

If you specify no projection, the find method returns all fields of all documents that match the query. Mognodb could potentially improve the speed of inserts. MongoDB Java Unknown Suppose your have a collection fubar with the following indexes created: You can call the cursor variable in the shell to iterate up to 20 times [1] and print the matching documents, as in the following example: Create mongldb Auto-Incrementing Sequence Field: There was one additional program that should have been downloaded in the project called validate.


homework 2.2 mongodb java

Indexes are particularly useful where the total size of the documents exceeds the amount of available RAM. Please query the video.

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For procedures and operational concerns, see Indexing Operations. Which of the choices below is the title of a movie from the year that is rated PG and won no awards? If everything is jwva properly, you should be able to start the blog by typing: Start by using mongoimport to import your albums. Please use the Enron dataset you imported for the previous problem.

The database consists of two collections, albums, and images.

Java MongoDB Tutorial

ObjectId “52ce53dde88″”fname”: Supposed we executed the following Java code. Create a Compound Index.

homework 2.2 mongodb java

ObjectId “52c54c93ead11dc57″”fname”: In this problem you will calculate the number of people who live in a zip mongocb in the US where the city starts with a digit. Check below all the statements that are true about the way MongoDB handled this query. Imagine an electronic medical record database designed to hold the medical records of every individual in the United States.


Now suppose you want to run the following query against the collection. Here are some example documents not from the collections you will be downloading. Which of the following statements are true about MongoDB replication. To do this, homeworm will need to unwind the To list for each message. MongoDB supports MapReduce and other aggregation tools.

MongoDB Java

That is, think mostly about the operational aspects of such a system. Notes on validation The Python validation script requires the following python modules be installed on your computer: Enter just the code, in the answer box below, no spaces.

MongoDB for Developers Homework 2. There should bedocuments after restore. For this question you will use the aggregation framework to figure out pairs of people that tend to communicate a lot. ObjectId “52c52addead11dc52″”type”: